B-Spec + GT2 + STU + FF at Buttonwillow Raceway Park
No mapCal Club 2024, Cal Club 2023
This track has been raced on 4 configurations (The Circuit, 2.57 mi; 2.92 mi; 1.83 mi; 3.02 mi). Laps on different configurations are not comparable, so only events on the 2.57 mile layout are shown; switch above to see the others.
One session is left out because the timing does not look like full laps: Cal Club 2023 Qualifying #2.
One run is left out as not that car's own laps (far quicker than the car managed in any other session and than anyone else in its class all week; usually a swapped transponder): Thomas Lepper in Cal Club 2026 Grp 1 EP FP HP B-Spec Race 1 (1:42.146; the car's best in any other session was 2:12.311 and the rest of the class's best all week 2:09.353).
One row per driver and car (a driver who changed cars has a row for each). Each cell is that driver's best in that car across the selected events, with the session it was set in. Best 5-lap stint is the mean of the driver's quickest five consecutive race laps, and consistency is how far their median race lap sat behind their best in that race (small is a driver who does it every lap); both come from the race with the best stint. The fastest in each column is purple, and a car whose best lap is more than 115% of the fastest in its class is greyed (marked ">115%" beside the driver) and left out of the colour scale. Click a column to sort, a row to highlight it.
Theoretical lap is the sum of the best sectors, whichever laps they came from, and never slower than the best lap (where a car's fastest laps were recorded without sector times, its best lap is used). The 115% mark is about the car's best lap only: a car whose best lap is within 115% of the fastest in its class is never marked. Greyed sectors with no theoretical lap mean the sector times on file do not add up to a believable lap. Letters refer to the events above; Q is qualifying, R a race.
Sectors
S1 SF → IM1 0.65 mi
S2 IM1 → IM2 0.75 mi
S3 IM2 → SF 1.17 mi
Spd In → Out 0.03 mi
Sectors are numbered in lap order from start/finish, whatever each event's timing called them; the loop names are SCCA timing's.
By car
Car
Class
Drivers
Lap
Qual
Race
Trap
S1
S2
S3
Chevrolet Camaro
GT2
3
1:42.698Tim Carroll
1:42.698Tim Carroll
1:44.128Tim Carroll
149.2Jean Meynet
28.543Jean Meynet
29.839Tim Carroll
44.262Tim Carroll
Ford Mustang
GT2
1
1:45.818Brad McAllister
1:45.818Brad McAllister
1:46.926Brad McAllister
115.9Brad McAllister
28.729Brad McAllister
30.833Brad McAllister
45.847Brad McAllister
Dodge Challenger
GT2
1
1:46.922Ben Valentine
1:46.922Ben Valentine
1:47.171Ben Valentine
132.9Ben Valentine
29.689Ben Valentine
30.929Ben Valentine
45.990Ben Valentine
Porsche GT3
GT2
2
1:47.914Rocky Crocker
1:47.914Rocky Crocker
1:48.433Rocky Crocker
155.7Rocky Crocker
29.826Rocky Crocker
31.456Rocky Crocker
46.030Rocky Crocker
Porsche GT3
GT2
1
1:47.914Rocky Crocker
1:47.914Rocky Crocker
1:48.433Rocky Crocker
155.7Rocky Crocker
29.826Rocky Crocker
31.456Rocky Crocker
46.030Rocky Crocker
Porsche GT3 Cup
GT2
1
1:57.745Robert Kelley
1:57.745Robert Kelley
1:58.760Robert Kelley
125.1Robert Kelley
32.864Robert Kelley
33.998Robert Kelley
50.578Robert Kelley
Swift Db6
FF
2
1:49.259Edward Erlandson
1:55.247Johnnie Crean
1:54.993Johnnie Crean
124.5Johnnie Crean
31.358Johnnie Crean
32.841Johnnie Crean
47.766Edward Erlandson
SWIFT DB-6 Honda
FF
1
1:49.259Edward Erlandson
47.766Edward Erlandson
Swift Db6
FF
1
1:54.993Johnnie Crean
1:55.247Johnnie Crean
1:54.993Johnnie Crean
124.5Johnnie Crean
31.358Johnnie Crean
32.841Johnnie Crean
50.291Johnnie Crean
Chevrolet Corvette
GT2
1
1:49.904Igor Lyustin
1:50.345Igor Lyustin
1:49.904Igor Lyustin
145.8Igor Lyustin
30.271Igor Lyustin
31.850Igor Lyustin
47.568Igor Lyustin
Mazda RX-3
STU
1
1:50.913Tony Rivera
1:50.913Tony Rivera
1:52.737Tony Rivera
135.2Tony Rivera
30.415Tony Rivera
32.456Tony Rivera
47.999Tony Rivera
Mazda RX-7
GT2/STU
4
1:51.013Guy Laidig
1:51.013Guy Laidig
1:52.486Guy Laidig
138.7Guy Laidig
30.134Guy Laidig
32.225Guy Laidig
47.907Guy Laidig
Piper DL7-Honda
FF
1
1:51.118Eric Poulsen
1:52.044Eric Poulsen
1:51.118Eric Poulsen
114.7Eric Poulsen
30.276Eric Poulsen
31.650Eric Poulsen
48.818Eric Poulsen
Mazda Miata
STU
1
1:51.602Whitfield Gregg
2:02.264Whitfield Gregg
2:01.538Whitfield Gregg
116.3Whitfield Gregg
30.652Whitfield Gregg
32.263Whitfield Gregg
48.687Whitfield Gregg
BMW M3
STU
1
1:52.380Wilson Powell
1:55.401Wilson Powell
1:53.843Wilson Powell
102.6Wilson Powell
30.577Wilson Powell
32.372Wilson Powell
49.215Wilson Powell
SWIFT DB-
FF
1
1:53.098Edward Erlandson
1:53.098Edward Erlandson
1:54.741Edward Erlandson
133.7Edward Erlandson
30.951Edward Erlandson
32.299Edward Erlandson
49.791Edward Erlandson
Honda S2000
STU
1
1:53.640Rylan Hazelton
1:55.834Rylan Hazelton
1:53.640Rylan Hazelton
134.8Rylan Hazelton
30.582Rylan Hazelton
32.779Rylan Hazelton
49.779Rylan Hazelton
BMW 330
STU
1
1:56.492Sean Lovett
1:56.492Sean Lovett
1:57.049Sean Lovett
133.7Sean Lovett
31.816Sean Lovett
33.669Sean Lovett
50.941Sean Lovett
Dodge VIPER
GT2
1
1:57.753Robert Kelley
2:00.453Robert Kelley
1:59.538Robert Kelley
92.9Robert Kelley
31.983Robert Kelley
33.965Robert Kelley
51.553Robert Kelley
Nissan 300ZX
STU
1
1:59.183James Slechta
1:59.183James Slechta
2:00.458James Slechta
132.0James Slechta
32.882James Slechta
34.528James Slechta
51.773James Slechta
Mazda MX-5
STU
2
1:59.707Oscar Jackson
2:04.115Dale Shoemaker
1:59.707Oscar Jackson
125.9Dale Shoemaker
32.339Oscar Jackson
34.219Oscar Jackson
52.330Oscar Jackson
Mini Cooper
B-Spec
2
2:09.353Trenton Kramer
2:09.353Trenton Kramer
2:09.916Trenton Kramer
121.5Trenton Kramer
34.887Trenton Kramer
37.301Trenton Kramer
56.951Trenton Kramer
Mazda 2
B-Spec
3
2:10.149Ali Naimi
2:11.287Ali Naimi
2:10.149Ali Naimi
117.2Ali Naimi
34.986Ali Naimi
37.336Ali Naimi
57.011Ali Naimi
Toyota Yaris
B-Spec
1
2:10.513Joseph Gersch
2:10.513Joseph Gersch
2:10.749Joseph Gersch
118.3Joseph Gersch
35.332Joseph Gersch
37.456Joseph Gersch
57.202Joseph Gersch
The best any driver of each car managed across the selected events, with who set it. Spellings and model years of the same car are grouped; click a row marked ▸ to see each version. Grouping is worked out from the names, so tell us if two cars are wrongly merged or split.
Rule changes between these events
Cal Club 2023 → Cal Club 2024 2023-02-24 to 2024-02-23
B-Spec Early Model Mini
#33363 from John Phillips · Rule change · TB 23-03 (2023-03 Fastrack)
fasterB-Spec Mini Cooper R56 MT/AT and Clubman R55 fuel pressure regulator increased from 40mm to 41mm with OE catalyst.
In BSPEC Spec Lines, Mini Cooper (R56) MT (07-10), change Notes as follows: “40 1mm FPR required with OE catalyst” “OBX header part #10-2101-2S permitted with 40mm FPR.” In BSPEC Spec Lines, Mini Cooper (R56) AT (07-10), change Notes as follows: “40 1mm FPR required with OE catalyst” “OBX header part #10-2101-2S permitted with 40mm FPR.” In BSPEC Spec Lines, Mini Cooper Clubman (R55) (07 - 10), change Notes as follows: “40 1mm FPR required with OE catalyst”
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“OBX header part #10-2101-2S permitted with 40mm FPR.”
STU E&O STU NA Weight Chart.
#33737 from Eric Heinrich · Rule change · TB 23-03 (2023-03 Fastrack)
fasterSTU minimum weight chart updated: 2450cc to 2595lbs, 2600cc to 2710lbs.
FF Add Fast Forward Part Numbers for Honda Fit Engine
#33752 from Formula/Sports Racing Committee · Rule change · TB 23-03 (2023-03 Fastrack)
neutralFF Honda Fit engine adds Fast Forward part number alternatives for intake, exhaust, oil system, and scavenge pump components.
In FC/FF, GCR section 9.1.1.B.14.a.6, change as follows: "For all Honda part numbers in these specifications, superc seding part numbers are considered equivalent. In FC/FF, GCR section 9.1.1.B.14.f.5, change as follows: "Cylinder head breather restrictor must be used as supplied by HPD or Fast Forward, unmodified.: HPD PN: 15262-F21S-A200; Fast Forward PN: FF200-503." In FC/FF, GCR section 9.1.1.B.14.k.2, change as follows: "The upper manifold, air box and throttle body assembly must be used as delivered from Honda, HPD, or Fast Forward as noted below."
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In FC/FF, GCR section 9.1.1.B.14.k.2, insert as follows: "a. Intake manifold: HPD PN: 17210-F21S-A210; Fast Forward PN: FF200-201. b. Throttle body: Honda Fit: PN: 16400ZZ5024; HPD PN: 16400ZZ5024; Fast Forward PN: FF200-104. c. Throttle lever: HPD PN: 17330-F21S-A210; Fast Forward PN: FF200-101." In FC/FF, GCR section 9.1.1.B.14.k.3, change as follows: "All gaskets and sensors utilized on the inlet manifold from head to throttle body must be Honda Fit OEM, or HPD supplied or Fast Forward as noted below. a. Gasket In. manifold: HPD PN: 17105-RB0-004, Honda Fit OEM. b. Gasket, EGR chamber cover: HPD PN: 17146-RB0-004, Honda Fit OEM. c. Gasket In. port: HPD PN: 17115-RB0-007, Honda Fit OEM. d. Gasket, restrictor: HPD PN: 17399-F21S-A200, (2 required) HPD; Fast Forward PN: FF200-109. Two required." In FC/FF, GCR section 9.1.1.B.14.k.5, change as follows: "The Honda Fit engine is required to have an HPD supplied air inlet restrictor supplied by HPD or Fast Forward: HPD PN: 17344- F21S-A201; Fast Forward PN: FF200-110, with internal diameter of 30.5mm and thickness of 3.175mm (0.125 inches) correctly installed within the intake system." In FC/FF, GCR section 9.1.1.B.14.m.1, change as follows: "The exhaust manifold must be as supplied by HPD or Fast Forward:, HPD part # PN: 18150-F21S-A200 or # PN: 1818 50-F21S-B200; Fast Forward PN: FF500-001 or PN: FF500-002." In FC/FF, GCR section 9.1.1.B.14.n.1, change as follows: "The oil pan, baffle plate, and scavenge pump filter fittings must be as supplied by HP or Fast Forward as noted below. No modifications are permitted. a. Oil pan: HPD PN: 11200-F21S-A210 or PN: 11200-F21S-C240; Fast Forward PN: FF100-201A or PN: FF100-201B. b. Oil pan baffle plate: HPD PN: 11221-F21S-A210; Fast Forward PN: FF100-202. c. Oil scavenge pump filter fittings (2 required): HPD PN: 15180-F21S-A210; Fast Forward PN: FF100-204." In FC/FF, GCR section 9.1.1.B.14.n.3, change as follows: "The scavenge pump and internal scavenge pump parts must be as supplied from HPD or Fast Forward as noted below." In FC/FF, GCR section 9.1.1.B.14.n.3, change as follows: "b. Rotor outside diameter: HPD 44.400mm (1.748 inches):; Fast Forward 40.640mm (1.600 inches). c. Scavenge pump rotor set: HPD PN: 15450-F21S-A20; Fast Forward PN: FF100-110. d. Oil pump: HPD PN: 15100-F21S-A200; Fast Forward PN: FF100-100A. e. Scavenge pump cartridge: 15111-F21S-A21; Fast Forward PN: FF100-127. f. Scavenge pump port A: HPD PN: 15137-F21S-A20; Fast Forward PN: FF100-101. g. Scavenge pump port B: HPD PN: 15139-F21S-A20; Fast Forward PN: FF100-102. h. Scavenge pump shaft: HPD PN: 15510-F21S-A20; Fast Forward PN: FF100-103. i. Scavenge pump front cover: HPD PN: 15070-F21S-A21; Fast Forward PN: FF100-104."
B-Spec Helper Versus Tender springs.
#33866 from Frank Schwartz · Rule change · TB 23-03 (2023-03 Fastrack)
slowerB-Spec may use helper springs up to 500 pounds rate; tender springs now prohibited.
In B-Spec Category Specifications, GCR Section 9.1.10.E.36., change as follows: "Suspension: competitors may use the OEM suspension, the specific suspension kit approved on the spec line or any B14 Bilstein shock or strut with no modifications except as required for mounting or to achieve allowed camber. Any camber plate may be used, but may not alter caster. Caster shall be within factory specification. Any part required to adapt the B14’s to the car must be submitted for approval by the CRB and added to the individual spec line. Any spring, including ‘helper’ or ‘tender’ springs, up to a maximum spring rate of 500 pounds may be used. Helper springs made of thin flat wire that are designed to take up the gap between the main spring and shock/strut at full travel are allowed. Tender springs are not allowed. Spring are allowed to be strapped or zip tied to the body. The purpose of the strap should be to keep the spring in place when the axle goes into rebound.
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The strap can serve no other function. Bump stops may be deleted but cannot be modified or substituted and shall serve no other purpose. Adjustable sway bar end links may be used on all cars. Sway bars may be disconnected and removed."
GT2 Adding Ginetta G56 GTA Factory ProTune for GT2 Class
#33825 from Robert Mueller · Rule change · TB 23-04 (2023-04 Fastrack)
unclearGT2 Ginetta G56 GTA may now use Factory installed ProMap ECU Map.
In GT Cars - Ginetta, Ginetta G56 GTA, add to Notes as follows: "May use Factory installed ProMap ECU Map."
neutralSTU Mazda BP5A classified at 1839 cc maximum displacement, 2023-04-01.
In STU Spec lines, classify Mazda BP5A as follows: STU Maximum Displacement (cc's) Minimum Weight Notes Mazda BP5A 1839 Chart May use engine in its entirety or specific components from the engine.
B-Spec T5 Rules Feedback
#33595 from Morgan Trotter · Rule change · TB 23-05 (2023-05 Fastrack)
neutralB-Spec and C-Spec wording clarified: CATEGORY to CATEGORIES, rules priority clarified for tire sizes, rim widths, springs, anti-roll bars, performance equipment.
In B-Spec, GCR Section 9.1.10.B, add as follows: “9.1.10. B-SPEC and C-SPEC CATEGORY CATEGORIES B-Spec (B-Spec) C-Spec (C-Spec) 9.1.10 continues in the B-SPEC and C-SPEC Category Rules.” In B-Spec, GCR Section 9.1.10.B-SPEC Category, change as follows: “These specifications are presented as an adjunct to the Manufacturer’s Service Manual. They are not meant to supersede the information that is in the manual that legitimately applies to the make, model, and year of car with the exception of the
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following items: TIRE SIZES, RIM WIDTHS, SPRINGS, ANTI-ROLL BAR(S), and PERFORMANCE EQUIPMENT. In the case of the foregoing exceptions, the B-Spec these Competition Rules will have priority. These specifications reflect the best information available at the time of publication. Any error found in this edition will be updated when reliable specifications are available from the manufacturer/manufacturer distributor or other sources recognized by SCCA®, Inc. A. Definition The B-Spec and C-Spec CATEGORY categories shall be considered primarily as a form for the membership to race street stock automobiles. Eligibility of cars may be discontinued at any time, for any reason other than competitive stature. The burden of proof lies upon any participant seeking action against another participant. NOTE: A Shop/Service Manual or its equivalent for the specific make, model, and year of automobile is required to be in the possession of each entrant. Manufacturer Shop/Service Manuals may come in the form of printed material, microfiche, CD, DVD, and/or Internet access to manufacturer website databases. It is the responsibility of the competitor to provide the electronic device capable of accessing the data for compliance verification. If Manufacturer Shop/Service Manuals are not available, then the competitor shall have a copy of the official SCCA® Vehicle Technical Sheet (VTS) with them at every event and shall present it for reference when officially requested. The manual is intended to aid SCCA® Technical Scrutineers in identifying parts and the configuration of the automobile. Overhaul procedures that in the slightest way would increase performance are not to be utilized (e.g., milled heads/blocks, porting, etc.). Blueprinting and balancing are inconsistent with the philosophy of this class and are not permitted. B. Automobile Eligibility Only those cars listed on spec lines are eligible to compete. Cars classified will be approved by EPA and DOT for sale in the United States and by Environment Canada for sale in Canada. They shall be models available to the general public for purchase. Additions and deletions of automobiles shall be at the discretion of the SCCA®. The vehicle identification number (VIN) shall correspond with the model automobile classified. At least one VIN plate or stamping shall remain in place on the dashboard or chassis that corresponds with the model automobile classified. C. Classification Classifications of automobiles eligible for competition will be reviewed on an annual basis and will be effective as of January 1st. D. Technical and Safety Items The following represent the only safety items and modifications permitted and required on automobiles involved in B Spec and C-Spec competition. Cars must meet comply with the GCR. The addition of safety items not specifically listed is not permitted. No permitted component/modification shall additionally perform a prohibited function. 1. Roll cages shall be contained entirely within the driver/passenger compartment and must comply with GCR Section 9.4, Roll Cages for GT and Production Based Cars. 2. Installation of a fire extinguisher or fire system as specified in GCR Section 9.3, Fire System. 3. Installation of a safety harness system as specified in GCR Section 9.3, Driver’s Restraint System. 4. All cars shall run with both front door windows fully open (down) if equipped, and shall have a driver’s side window safety net per GCR Section 9.3, Window Safety Nets. Any cars where a window safety net cannot be installed, arm restraints shall be used. Arm restraints are not an acceptable substitute for window nets in other cars. Window safety nets shall be mounted in such a manner to provide protection in the event the driver’s door opens. Rear windows shall be run in the closed (up) position. 5. Passive restraint systems shall be deactivated.* 6. Air bag systems shall be disarmed and may be removed.* If so equipped, the rolling door lock mechanism may be deactivated by unplugging the components. 7. The driver’s seat (only) shall be replaced with a one-piece, bucket-type race seat. Standard seat tracks/brackets may be modified, reinforced, and/or removed to facilitate replacement mountings provided they perform no other function. 8. Steering lock mechanisms may be removed or disabled. 9. An electrical master switch may be installed. *If car is used on public roads, these items should be replaced, reactivated, rearmed, etc. when not in competition. E. Vehicle Preparation The following represents the only items authorized in the preparation of a vehicle for B-Spec and C-Spec competition other than safety items as required in Section 9.1.7.D, Technical and Safety Items. Modifications shall not be made unless specifically authorized herein. No permitted component/modification shall additionally perform a prohibited function. 1. Appearance shall be neat and clean. Automobiles that are dirty either externally or in the engine or passenger compartments, or that show bodywork damage or that are partially or totally in primer, or that do not bear the prescribed identification marks shall not be approved for competition. Vehicles may be painted any color(s). 2. Towing eyes per GCR Section 9.3, Towing Eyes, shall be fitted. 3. Hubcaps, wheel trim rings, jack, and tools shall be removed. 4. All mud flaps shall be removed. 5. Spare wheels and tires may be removed. Spare tire covers and trunk mats and/or trunk carpeting shall be removed if they present a hazard as a loose flying or flapping object. 6. All adjustments shall be at the manufacturer’s specification and/or within the manufacturer’s specified tolerances unless they are specifically allowed in the GCR (example camber angle). 7. Tires: a. Tires shall be Hankook 205/50R15 C51 or Hankook 200/580R15 Z217. No mixing of wet and dry tires on the same car. Tires must be run unmodified. b. When using the wet tire, all cars get a 0.2” lower ride height allowance due to smaller radius of the wet tire. 8. Wheels: Required wheel/rim diameter is fifteen inches (15”). Maximum wheel/rim width is seven inches (7”). Minimum Wheel/rim weight shall be 13 lbs. All wheels shall be one-piece metal castings or metal two piece welded. All four wheels must be the same dimensional offset. Aftermarket wheel studs and/or wheel bolts are allowed. Wheel bolts may be replaced with studs and nuts. Wheel spacers are allowed, the same thickness spacer must be used on all four corners. Wheels are permitted any offset provided the tire tread (that portion of the tire that contacts the ground) does not protrude beyond the fender opening when viewed from the top perpendicular to the ground. 9. Radio/stereo audio equipment and air conditioning refrigerant systems are the only options permitted and may be non- manufacturer, standard equipment. Two way radios may be used. Hand controls are allowed in those instances where the driver can demonstrate the physical need for them. Removal of rear window wipers and wiper motor is allowed. 10. Fuel, coolant, oil fluid hoses and clamps, oil filters, fuel filters, and belts (fan, alternator, etc.) may be substituted with others of equivalent manufacturer’s specifications. 11. Brake fluid: May be substituted with other equivalent manufacturer’s specification. 12. Lubricants: Lubricants may be substituted with any lubricant. Additives are unrestricted. 13. Spark Plugs: Authorized spark plugs listed in spark plug manufacturer’s application charts, owner’s manual, manufacturer’s shop/service manual, or equivalent justified by one cross reference chart. Use of resistor- or non resistor spark plug allowed. 14. “Special performance” specifications from the manufacturer that go beyond those listed on a specification line for a car will not be considered valid. Any manufacturer determined to be supplying false specifications to competitors or to SCCA will be advised that the specifications shall be withdrawn and/or the eligibility of the car(s) involved will be terminated. The SCCA® Club Racing Board (CRB) is authorized to implement these terminations on an immediate basis without Board of Directors (BoD) approval. In the case of service circulars, recalls, etc., the burden of proof of validity will be upon the competitor. 15. Ride height: Minimum ride height is six (6) inches, to be measured without driver at the lowest point of the rocker panels, but not to include welded seams or fasteners. A vehicle may have a ride height listed in the spec line, the competitor must conform to the spec line. 16. Batteries may be replaced with those of alternate manufacture provided they are of similar amp hour (Ah) capacity and weight. Battery must remain in stock location. Additional hold-down brackets are allowed. 17. Weight: The minimum weight as listed on the B Spec and C-Spec line is with driver and ballast may be added to meet the listed minimum weight. Refer to section 9.3. Ballast, for placement of the ballast. If a cool suit system is utilized, the cool suit system shall be weighed with the car as it came off the track. A. The ballast shall be in segments no lighter than ten (10) pounds and no heavier than fifty (50) pounds. B. Each segment shall be fastened with a minimum of two (2) one-half inch (1/2”) bolts and positive lock nuts of SAE Grade 5/Metric 8.8 or better, and shall utilize large diameter, load distributing washers. 18. Fuel: Only the fuel type specified by the owner’s or manufacturer’s shop/service manual may be used. Refer to GCR Section 9.3, Fuel, for permitted fuel specifications. 19. Removal of Air Conditioning System: The manufacturer’s or aftermarket air conditioning system may be removed. Items that serve a dual purpose, such as the alternator/air conditioning compressor bracket, may not be substituted. Idler pulleys and belts may be substituted as needed when compressor is removed. 20. Removal of radio and speaker components is permitted. Removal of horn and cruise control system is permitted. 21. A radiator screen of minimum one-fourth inch (1/4”) mesh may be added in front of the radiator and contained within the bodywork. 22. Air filter elements may be substituted with other air filters of equivalent specifications and fit in the standard location with no modifications. The filter element must be substantiated by a minimum of one (1) manufacturer cross-reference for specific vehicle application. 23. Any brake pad or lining may be used. Metal or plastic dust shields may be removed or modified by removing material. 24. Standard replacement brake rotors/drums may be obtained from sources other than the original manufacturer provided they are the exact equivalent. 25. The Club Racing Board may approve the use of automatic transmissions and/or hand controls on a case-by-case basis. 26. Interior mirror(s) may be replaced with a multi-panel type mirror, but shall not extend beyond the confines of the interior. 27. Only OE catalyst are permitted. The exhaust system downstream of the primary catalyst may be replaced provided: A. Said replacement system retains the same original configuration, e.g., routing, single, dual, etc. B. The system exits from the body in the same approximate location(s) as the original. When an original equipment single exhaust system is cosmetically split into dual outlets, it is permitted to continue as a single system provided it exits in approximately the same location as one of the originals. C. The system meets all appropriate event-specific sound level requirements. D. All oxygen sensors must be intact and in stock location. E. Primary catalytic converter may not be modified in any way. F . The Mazda 2, Fiat 500, 2007-10 Mini Cooper all may remove the primary cat/exhaust manifold to install their approved header. All oxygen sensors must be maintained. The original heat shields or heat wrap may be used to insulate the replacement header from objects they come close to. 28. Aftermarket steering wheels, and their required mounting modifications, are permitted. Removable steering wheels are permitted. 29. Lap Timing and Data Acquisition Devices that perform no function other than to relay lap times to the driver (Longacre Hot Lap, Intercomp Lap Timer, etc.) are permitted, along with the required mounting hardware and connections. Stand-alone data acquisition systems (GPS or accelerometer-based) are allowed. One connection from the OBD2 port to the stand-alone data acquisition system is permitted. No additional sensors may be added and the data acquisition system must not tie into the vehicle electronics in any other manner beyond this allowance. The SCCA may install a standalone data box in a competitor’s car at any time. Refusal of the installation of the data box will result in disqualification. Analog (needle type) gauges for oil pressure, oil temp and water temp may be added as long as they are not tied into the vehicles ECU in any way. Stand alone shift lights may be added. 30. Sunroofs, Targa tops, and T-tops are only permitted if installed by the manufacturer of the vehicle. If installed they must be retained in the closed position and securely bolted in place unless the operating rails adequately secure the panel. Glass panels are permitted. Glass panels may be replaced with a ferrous metal panel. Components (motors, cables, rails) may be removed provided the panel is securely retained. 31. Hatchback “privacy covers” must be completely removed. 32. Cosmetic plastic engine covers may be removed. 33. Original brake and clutch hoses may be replaced by braided stainless steel brake lines and clutch lines. 34. Interiors may be removed including seats, seat brackets, carpet, carpet padding, rear door panels, OEM seat belts, interior trim, and headliners. Front door window glass, front window operating mechanism, inner door trim panel, armrest, map pockets, wiring harnesses for front door locks, power mirrors, seat wiring, etc., and inside front door latch/lock operating mechanism may be removed. Original radio/ stereo audio equipment and air conditioner refrigerant systems may be removed. Heater cores, and hoses, must remain except duct work under seats. Duct work behind the dash may be trimmed but not removed to allow for roll cage installation. 35. Maximum 3.5 degrees negative camber is allowed on front and rear suspensions. Strut suspensions may adjust camber by the use of eccentric bolts (crash bolts) at the strut-to-spindle, slotted strut mounting holes at the spindle, and/or by use of any slotted camber only adjuster plate at the top of the strut mounting plate. If upper strut slotted plates are used, they shall be located on existing chassis structure and may not serve as reinforcement for that structure. Modifications to the top of the strut tower may be made to allow for camber adjustment only. Modifications to the existing holes must only be moved straight inboard even if the existing slots would translate the top of the strut rearward. On other forms of suspension, camber adjustment may be achieved by the use of shims and/or eccentric bolts (crash bolts). 36. Suspension: competitors may use the OEM suspension, the specific suspension kit approved on the spec line or any B14 Bilstein shock or strut with no modifications except as required for mounting or to achieve allowed camber. Any camber plate may be used, but may not alter caster. Caster shall be within factory specification. Any part required to adapt the B14’s to the car must be submitted for approval by the CRB and added to the individual spec line. Any spring, including ‘helper’ or ‘tender’ springs, up to a maximum spring rate of 500 pounds may be used. Helper springs made of thin flat wire that are designed to take up the gap between the main spring and shock/strut at full travel are allowed. Tender springs are not allowed. Springs are allowed to be strapped or zip tied to the body. The purpose of the strap should be to keep the spring in place when the axle goes into rebound. The strap can serve no other function. Bump stops may be deleted but cannot be modified or substituted and shall serve no other purpose. Adjustable sway bar end links may be used on all cars. Sway bars may be disconnected and removed. If a manufacture does not offer an upgrade, a competitor may submit a shock and spring package for approval by the CRB. At the time of approval, that kit will become the standard for that make and model until the manufacture submits a factory supported kit. The competitor supplied kits needs to be comprised of the following: • Any non-adjustable shock absorber intended for the specific make model and year car is allowed. The shock absorber must be installed in the original mounting locations. Remote shocks are not permitted. Threaded shock bodies or adjusters may be used. • Any spring up to a maximum spring rate of 500 pounds may be used with the OEM suspension, the manufacturer’s upgraded suspension kit, or the Bilstein B14 suspension kit. 37. ECU/PCM: OEM ECU/PCMs is required. Alternate engine calibrations are allowed. The car may meet federal emission standards, but shall provide OBD II compliant data to the data link connector. Manufacturers may provide a stability control override procedure or module. 38. B Spec and C-Spec front and rear toe settings are free. Rear toe adjustments may be achieved by the use of shims. 39. Fenders and wheel openings shall remain unmodified. It is permitted to roll under or flatten any interior lip on the wheel opening for tire clearance. Cars with plastic/composite fenders may remove any interior wheel opening lip, but the resulting material edge shall be no thinner than the basic fender material thickness. Non metallic inner fender liners may be removed. 40. An oil catch can is permitted. 41. Optional Hood Pins may be added to supplement the original hood latch system. All parts of the original hood latch system must remain in the car. 42. Brake ducts are permitted, but they must serve no other purpose. Duct openings may be created by the removal of the fog lights. Alternatively, duct openings may be created by opening 2 sections up to 14.5 square inches each of stock false grills originally located in the front fascia, or radiator shroud, but in this case while fog lamps may be removed. Fog light holes must be completely covered. The stock headlamp location is not permitted for brake ducting. 43. Automatic and cvt transmissions versions of all legal cars are legal for competition in B-Spec and C-Spec meeting their spec line. Models with OEM paddle shifters are acceptable. Auxiliary transmission coolers may be approved on a case by case basis. Part numbers must be submitted and added to the cars spec line. 44. Auxiliary transmission coolers may be approved on a case by case basis. Part numbers must be submitted and added to the cars spec line. 45. Restrictor – BS B-Spec and C-Spec cars whose spec line require a restrictor will follow the definition of a Flat Plate Restrictor (FPR) outlined in Appendix F with only one exception, B-Spec and C-Spec requires the thickness of the Restrictor to be 0.050” to 0.079. 46. All B-Spec and C-Spec cars in post-race impound at all Majors and Super Tour races shall open their hoods and hatches/trunks for the purpose of visual inspection by other competitors. Competitors may thereafter initiate a protest as permitted under the GCR.” In GCR, CONTENTS, change as follows: “9.1.9.2 TOURING (T2-T5 4) CATEGORY” “T5 697” In GCR, Section 9.1.9. TOURING CATEGORY CLASSES, remove as follows: “Touring 5 (T5) Regional Class” In GCR, Section 9.3.22. FIRE SYSTEM, change as follows: “All cars shall be equipped with an On-Board Fire System except T3, T4, T5,” In GCR, Section 9.1.9.2 TOURING (T2-T5) CATEGORY header, change as follows: “TOURING (T2-T5 4) CATEGORY” In GCR, Section 9.1.9.2 TOURING (T2-T5) CATEGORY, change as follows: “Touring car eligibility: Cars are eligible for the class they are listed with a specification line and with the specific allowances permitted. In addition T2-T5 4 cars may race one class up in touring classes above their specification line class as long as they are a legal T2-T5 4 car and conform to their specification line allowances as classified. T5 is a Regional only class.” In GCR, Section 9.1.9.2.D.1.e.1., change as follows: “Any overbore up to .020” permitted T2- T5 4with +30 lbs. penalty. Oversize OEM equivalent pistons are required. This allowance does not apply to any car adhering to spec rules.” In GCR, Section 9.1.9.2.D.1.i.5., change as follows: “T2- T5 4 only:” In GCR, Section 9.1.9.2.D.5.a.1., change as follows: “T2- T5 4:” “Spherical bearings/bushings are not permitted in T2- T5 4 except for the specific examples listed in the class rules or vehicle spec line.” In GCR, Section 9.1.9.2.D.5.b.2., change as follows: “T4 and T5 only” In GCR, Section 9.1.9.2.D.5.b.2.c., change as follows: “T3, T4 and T5 4:” In GCR, Section 9.1.9.2.D.5.b.2.d., change as follows: “T2- T5 4 only:” In GCR, Section 9.1.9.2.D.7.a.3., remove as follows: “T5 only: (unless specified on spec line) Any aftermarket wheel allowed.” In GCR, Section 9.1.9.2.D.7.b., remove as follows: “ T5 has a maximum tire width of 225 and a minimum aspect ratio of 45.” In GCR, Section 9.1.9.2.D.10.c., remove as follows: “All cars shall have, as a minimum, a fire extinguisher meeting the specifications of GCR Section 9.3 Fire System. Touring 2 cars must have a fire system installed. Touring 3,and Touring 4, and Touring 5” In GCR, Section 9.1.9.2.E.1., remove as follows: “Touring Category Classes are as follows: T2, T3, T4 and T5 4:” In GCR, Touring Spec Lines, remove 9.1.9.2. T5 Spec Line in it’s entirety.
GT2 Request to class 2011 Porsche Cayman S
#33771 from Coyote Black · Rule change · TB 23-05 (2023-05 Fastrack)
neutral2009-2012 Porsche Cayman S classified in GT2, 3.4L, RWD, no PDK transmission allowed.
In GT Cars - Porsche, classify Porsche Cayman ‘S’ as follows: GT Cars - Porsche Model Years Body Style Drive- line Wheel- base (in) Notes Porsche Cayman ‘S’ 09-12 2 dr. Coupe RWD 95.08 3.4L No PDK Transmission
GT2 Please classify Fields Cardinal V8
#33784 from James Rogersn · Rule change · TB 23-05 (2023-05 Fastrack)
neutralFields Cardinal V8 classified in GT1 with Ford V8 engine, 4.9L displacement, 2100 lbs minimum weight.
In GT Spec Lines, GT1 Cars - Fields Cardinal, classify Fields Cardinal V8 as follows: GT1 Cars – Fields Cardinal Model Years Body Style Drive- line Wheel- base (in) Notes Fields Cardinal V8 2023 2 Dr. RWD 92.0 Roll Cage MUST be modified to comply with
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GCR Section 9.4. In GT Spec Lines, GT1Engines - classify Ford V8 as follows: GT1 Engines - Ford Engine Family Engine Type Bore x
A specification table follows in the original; it is not shown here.
B-Spec T5 Mazda 3 Spec Line Addition
#33536 from Morgan Trotter · Rule change · TB 23-06 (2023-06 Fastrack)
In C-Spec Spec Lines, classify Mazda 3i Touring 2.0 Skyactive MT (12-13) as follows:
A specification table follows in the original; it is not shown here.
B-Spec T5 Ride Height Rules.
#33552 from Michael Ogren · Rule change · TB 23-06 (2023-06 Fastrack)
neutralB-Spec minimum ride height set to 6 inches, C-Spec to 5½ inches.
In B-Spec and C-Spec Categories Specifications, GCR Section 9.1.10.E.15., add the following: "Ride height: For B-Spec Minimum ride height is six (6) inches, for C-Spec Minimum ride height is five and a half (5½) inches,"
B-Spec T5 Spring Allowance
#33557 from Mike Ogren · Rule change · TB 23-06 (2023-06 Fastrack)
neutralB-Spec springs capped at 500# front and rear; C-Spec at 600# front, 800# rear; both may be strapped to body.
In B-Spec and C-Spec Categories Specifications, GCR Section 9.1.10.E.36., add the following: "Suspension: B-SPEC competitors may use the OEM suspension, the specific suspension kit approved on the spec line or any B14 Bilstein shock or strut with no modifications except as required for mounting or to achieve allowed camber. C-Spec competitors may use the OEM Suspension, the specific suspension kit approved on the spec line or TBD. Any camber plate may be used, but may not alter caster. Caster shall be within factory specification. Any part required to adapt the B14’s to the car must be submitted for approval by the CRB and added to the individual spec line. Any spring, including ‘helper’ or ‘tender’ springs, up to a maximum spring rate of 500 pounds may be used. for B-Spec the maximum spring rate is 500# front and rear, for C-Spec the maximum spring rate is 600 pounds front and 800 pounds rear. Spring are allowed to be strapped or zip tied to the body. The
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purpose of the strap should be to keep the spring in place when the axle goes into rebound. The strap can serve no other function. Bump stops may be deleted but cannot be modified or substituted and shall serve no other purpose. Adjustable sway bar end links may be used on all cars. Sway bars may be disconnected and removed.
B-Spec T5 Wheel Minimum Weight
#33558 from Mike Ogren · Rule change · TB 23-06 (2023-06 Fastrack)
neutralB-Spec wheels minimum weight set to 13 lbs, C-Spec to 17 lbs.
In B-Spec and C-Spec Categories Specifications, GCR Section 9.1.10.E.8., add the following: "Wheels: For B-Spec Required wheel/rim diameter is fifteen inches (15”). Maximum wheel/rim width is seven inches (7”). Minimum Wheel/rim weight shall be 13 lbs. For C-Spec Required wheel/rim diameter is seventeen inches (17”). Maximum wheel/rim width is eight inches (8”). Minimum Wheel/rim weight shall be 17 lbs.."
B-Spec T5 Tire Options
#33641 from Frank Schwartz · Rule change · TB 23-06 (2023-05 Fastrack)
In B-Spec and C-Spec Categories Specifications, GCR Section 9.1.10.E.7.a., add the following: "For B-Spec: Tires shall be Hankook 205/50R15 C51 or Hankook 200/580R15 Z217. No mixing of wet and dry tires on the same car. For C-Spec: Tires shall be 225/45R17. DOT Tires must be run unmodified.
fasterB-Spec and C-Spec Chevrolet Sonic allows ZZP aluminum radiator #ZZP-ZZ013; Hatch MT restrictor increases to 34mm.
In B-Spec Spec Lines, Chevrolet Sonic 4dr Sedan MT (12-19), add to Notes as follows: "Allow Aluminum Radiator #ZZP-ZZ013." In B-Spec Spec Lines, Chevrolet Sonic 4dr Sedan AT (12-19), change as follows: Car: "Chevrolet Sonic 4dr SedanHatch AT (12-19)" Notes:"Allow Aluminum Radiator #ZZP-ZZ013." In B-Spec Spec Lines, Chevrolet Sonic 4dr Hatch MT (12-19) , add to Notes as follows: "6T40e automatic equipped only. 33 34mm flat plate restrictor required. GM suspension kit #23123679 permitted. Allow rear sway bar ZZ Performance #ZZ-SNCRSB. Allow Aluminum Radiator #ZZP-ZZ013."
B-Spec Fasteners for Bumper Caps
#33797 from Kent Carter · Rule change · TB 23-06 (2023-05 Fastrack)
neutralB-Spec and C-Spec bumper caps now allow positive fasteners like machine screws and T-nuts or rivet-nuts; self-drilling and sheet metal screws prohibited.
In B-Spec and C-Spec Categories Specifications, GCR Section 9.1.10.E., add the following: "47. Positive fasteners may be used to attach the bumper caps to the OEM bumper cap clips and may include a machine screw and T-nut or a rivet-nut. Pointed screws such as self-drilling/tapping or sheet metal screws are prohibited."
B-Spec Allow CAN Bus Connection to Data Systems
#33806 from Kent Carter · Rule change · TB 23-06 (2023-05 Fastrack)
neutralB-Spec and C-Spec allow CAN bus connections to data systems for monitoring only; systems must not send data.
In B-Spec and C-Spec Categories Specifications, GCR Section 9.1.10.E.29., change as follows: "Lap Timing and Data Acquisition Devices that perform no function other than to relay lap times to the driver (Longacre Hot Lap, Intercomp Lap Timer, etc.) are permitted, along with the required mounting hardware and connections. Stand-alone data acquisition systems (GPS or accelerometer-based) are allowed. One connection from the OBD2 port to the stand-alone data acquisition system is permitted. No additional sensors may be added and the data acquisition system must not tie into the vehicle electronics in any other manner beyond this allowance. The SCCA may install a standalone data box in a competitor’s car at any time. Refusal of the installation of the data box will result in disqualification. Analog (needle type) gauges for oil pressure, oil temp and water temp may be added as long as they are not tied into the vehicles ECU in any way. Stand
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alone shift lights may be added. Connections to the CAN bus are permitted for the purpose of reading CAN data to monitor vehicle and driver performance using data logging systems, dashboards and indicators. All connected systems must remain 'silent' on the CAN bus: they may receive data but must not send data on the BUS. GPS-based data acquisition and coaching devices are permitted."
B-Spec Request Ford Fiesta weight reduction 25lbs
#33890 from Andrew Doyle · Rule change · TB 23-06 (2023-05 Fastrack)
fasterB-Spec Ford Fiesta 5dr and 4dr lose 25 lbs each, to 2470 lbs minimum weight.
In B-Spec Spec Lines, Ford Fiesta 5dr Hatchback (11-19), change Weight as follows: "2495 2470" In B-Spec Spec Lines, Ford Fiesta 4dr Sedan (11-19), change Weight as follows: "2495 2470"
B-Spec Threaded Metal Inserts for Plastic Intake Manifolds
#34164 from Kent Carter · Rule change · TB 23-06 (2023-06 Fastrack)
neutralB-Spec and C-Spec allow metal threaded inserts in plastic intake manifolds for throttle body fasteners.
In B-Spec and C-Spec Categories Specifications, GCR Section 9.1.10.E., add the following: "48. All cars which use throttle body to intake fasteners directly into a plastic intake, are allowed to convert the intakes to accommodate a metal threaded insert. This is done for the sole reason that repeated removal of the restrictor plate wears the threads in the intake and eventually causes the need to replace the intake."
B-Spec BoB Adjustments
#34208 from Club Racing Board · Rule change · TB 23-05 (2023-05 Fastrack)
unclearB-Spec Ford Fiesta 5dr and 4dr lose 25 lbs each to 2470; Honda Fit MT and CVT lose 50 lbs each to 2525; Mazda2 loses 50 lbs to 2280; Kia Rio restrictor increases from 39 to 41 mm; Mini Cooper variants gain 75 lbs to 2675 with larger restri…
The popularity of BSPEC has brought heightened attention to the Balance of Performance (BoP). Given the wide diversity of eligible cars and their designs, driving ability, car preparation/tuning levels, and other variables outside of SCCA’s control, the BoP in this class has been remarkably close. As compared to IMSA’s job of balancing cars which are all professionally prepared, driven, and highly instrumented, the job of our advisory committees and CRB is considerably more difficult. There are most certainly outliers and cars which are superior under certain conditions, but in the absence of BoP regulations which vary from track to track a perfect balance every weekend is not to be expected. The BoP is set by SCCA for what is perceived to be the ultimate tune and best driver in a given car across the entire racing season and over as many tracks as can be reasonably sampled. If a car is not prepared, tuned, and driven to its ultimate capability we cannot expect that it will be on par with cars of other manufacture which
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are to such level; the BoP is not a handicap program. And, while the class is named “BSPEC”, it is not a spec class as is FE2 or SRF3. The more experienced mechanics and drivers will certainly have an advantage over those who only race a few times per season. Anecdotal observations do not serve the SCCA in working towards a proper BoP, yet that is the type of information most commonly provided in support of a requested change. Hard data and experience are what drive change to the BoP. Despite what we believe to be an excellent BoP for this class, there is always room for improvement. The BSPEC Advisory Committee has recently been charged with the considerable task of classifying cars and refining the technical specifications for the new T5/CSPEC class and, as a result, does not have sufficient time or resources to address the immediate demands for BoP adjustments in BSPEC. As a result, veteran CRB members Peter Keane, Tom Start, and Sam Henry have poured through BSPEC data reports from events over the past eighteen (18) months and have recommended to the CRB the following changes which were approved during its most recent meeting. These changes will be effective beginning 5/1/2023 for positive adjustments and 6/1/2023 for negative adjustments. Data will be gathered as possible with a focus on continued improvement. Comments and suggestions regarding same should be forwarded through the official letter system. Your continuing support of BSPEC and SCCA is greatly appreciated. In B-SPEC Spec Lines, Ford Fiesta 5dr Hatchback (11-19), change Weight as follows: “2495 2470” In B-SPEC Spec Lines, Ford Fiesta 4dr Sedan (11-19), change Weight as follows: “2495 2470” In B-SPEC Spec Lines, Honda Fit MT (15-19), change Weight as follows: “2575 2525” In B-SPEC Spec Lines, Honda Fit CVT (15-19), change Weight as follows: “2575 2525” In B-SPEC Spec Lines, Kia Rio 5-door/LX (12-19), change Notes as follows: “39 41mm flat plate restrictor required.” In B-SPEC Spec Lines, Mazda2 (10-14), change Weight as follows: “2330 2280” In B-SPEC Spec Lines, Mini Cooper (R56) MT (07-10), change as follows: Weight: “(Effective 6/1/2023) 2600 2675” Notes: “(Effective 6/1/2023) 41 44mm FPR required with OE catalyst.” In B-SPEC Spec Lines, Mini Cooper (R56) AT (07-10), change as follows: Weight: “(Effective 6/1/2023) 2600 2675” Notes: “(Effective 6/1/2023) 41 44mm FPR required with OE catalyst.” In B-SPEC Spec Lines, Mini Cooper Clubman (R55) (07 - 10), change as follows: Weight: “(Effective 6/1/2023) 2600 2675” Notes: “(Effective 6/1/2023) 41 44mm FPR required with OE catalyst.” In B-SPEC Spec Lines, Mini Cooper (R56LCI) MT (11-13), change as follows: Weight: “(Effective 6/1/2023) 2600 2675” Notes: “(Effective 6/1/2023) 41 43mm FPR required.” In B-SPEC Spec Lines, Mini Cooper (R56LCI) AT (11-13), change as follows: Weight: “(Effective 6/1/2023) 2600 2675” Notes: “(Effective 6/1/2023) 40 43mm FPR required.” In B-SPEC Spec Lines, Mini Cooper Countryman (R60) (11-16), change as follows: Weight: “(Effective 6/1/2023) 2600 2675” Notes: “(Effective 6/1/2023) 41 42mm flat plate restrictor required.” In B-SPEC Spec Lines, Mini Cooper Paceman (R61) (11-16), change as follows: Weight: “(Effective 6/1/2023) 2600 2675” Notes: “(Effective 6/1/2023) 41 42mm flat plate restrictor required.” In B-SPEC Spec Lines, Mini Cooper Clubman (R55) (11-15), change as follows: Weight: “(Effective 6/1/2023) 2600 2675” Notes: “(Effective 6/1/2023) 41 42mm flat plate restrictor required.” In B-SPEC Spec Lines, Mini Cooper Coupe (R58) (12-15), change as follows: Weight: “(Effective 6/1/2023) 2600 2675” Notes: “(Effective 6/1/2023) 40 42mm flat plate restrictor required.”
GT2 appendix letter #33635
#34206 from Ian Barberi · Rule change · TB 23-06 (2023-07 Fastrack)
neutralGT2 BMW engines: 3.4L 6-cyl at 2575 lbs, 4.0L V8 at 2900 lbs, 4.5L V8 at 2950 lbs, 5.0L V8 at 3000 lbs; S54 with 97mm stroke permitted at 2800 lbs.
In GT2-ST Spec Lines, BMW E46 M3 & E36 / BMW Z3 / BMW 5000cc V8, change notes as follows: "The 3.4 liter 6 cyl. (87.0 bore x 93.0 stroke) is permitted at 2575lbs. 4.0L V8 permitted at 2900lbs. 4.5L V8 permitted at 2950lbs. 5.0L V8 permitted at 3000lbs. Flossman body kit permitted as found at http://www.racingpartsbmw.de/start/eng/start.htm. Trans Am SGT spec: Regular shifter 3000 lbs., paddle shifter plus 150 lbs. 95mm S54 crankshaft @ +150lbs. Lang Racing part# S54-95mm-StrokerCrk. S54 engine is permitted a 97mm stroke crankshaft (part #VAC-SC-S54) @2800lbs."
B-Spec Hyundai Accent Restrictor Plate
#34331 from Jose Fabian · Rule change · TB 23-06 (2023-07 Fastrack)
fasterB-Spec Hyundai Accent GS Hatchback restrictor plate increases from 39mm to 41mm.
In B-Spec Spec Lines, Hyundai Accent GS Hatchback (13-19), change Notes as follows: "39 41mm"
B-Spec Hyundai Accent 2012 Model
#34332 from Jose Fabian · Rule change · TB 23-06 (2023-07 Fastrack)
neutralB-Spec Hyundai Accent GS Hatchback model years corrected from 13–19 to 12–19.
In B-Spec Spec Lines, Hyundai Accent GS Hatchback (13-19), change model as follows: "Hyundai Accent GS Hatchback (13 12 -19)"
GT2 Remove Weight and Restrictor Penalty for Corvette C7 Body
#34342 from Jorge A Nazario · Rule change · TB 23-06 (2023-07 Fastrack)
fasterGT2 Corvette C7 restrictor increases from 73mm to 77mm flat plate, removing weight penalty.
In GT2/ST, Chevrolet Corvette (2014-2019) change as follows: Restrictor: "73 7mm flat plate"
STU 2022 Toyota GR Cup for STU
#34449 from Club Racing Board · Rule change · TB 23-06 (2023-05 Fastrack)
neutralToyota GR Cup and GR86 Cup (2022-) newly classified in STU at 2700 lbs with 2387 cc engine.
In STU Spec Lines, Toyota GR Cup (2022-), classify as follows:
A specification table follows in the original; it is not shown here.
B-Spec Initial car classifications and spec lines
#34461 from Kent Carter · Rule change · TB 23-09 (2023-09 Fastrack)
neutralC-Spec adds Chevrolet Cruze, Ford Focus, Honda Civic, Mazda 3i, Toyota Corolla, VW Jetta; updates Dodge Dart, Mazda3s, Toyota Corolla specs.
In C-Spec Spec Lines, add Chevrolet Cruze (10-16) as follows:
A specification table follows in the original; it is not shown here.
GT2 GT2 Mazda 20B 3 rotor ENO
#34765 from Grand Touring Committee · Rule change · TB 23-09 (2023-09 Fastrack)
fasterGT2 Mazda 20B 3 rotor loses 220 lbs, to 2280, consolidating two spec lines.
In GT2 Spec Lines, Engines - MAZDA, combine both 20B to one spec lines and keep the following: Weight: "2500 2280" Notes: "Must run +100 lbs. for Grand Am transaxle and independent rear suspension. Must comply with all other GT2 rules."
GT2 Late E & O
#34966 from Scotty B White · Rule change · TB 23-10 (2023-10 Fastrack)
fasterGT2-ST Dodge Viper including Comp Coupe, ACR/ACR-X with VRL front fascia loses 100 lbs.
RM 23-10 GT2-ST Dodge Viper, incl Comp Coupe, ACR/ACR-X VRL Front Fascia As an Errors and omissions fix to what was originally intended for these cars, the Club Racing Board and Board of Directors have approved the following: In GT2-ST, Dodge Viper, incl Comp Coupe, ACR/ACR-X add VRL front fascia -100lbs to all Spec Lines.
B-Spec B-Spec Tire
#35034 from Club Racing Board · Rule change · TB 23-11 (2023-11 Fastrack)
neutralB-Spec adds Goodyear Eagle RS dry and wet tires as options alongside Hankook; Hankook restricted to regional events from 2024.
RM 23-11 In GCR Section 9.1.10.7., change as follows: "For the remainder of 2023, B-Spec entrants will be allowed to compete on both Hankook and Goodyear Tires. For B-Spec Tires shall be Hankook 205/50R15 C51, or Hankook 200/580R15 Z217, P205/50ZR15 Goodyear Eagle RS (Dry tire) Catalog #D4850 or P205/50ZR15 Goodyear Eagle RS-R (Wet tire) Catalog #D4851. For C-Spec: Tires shall be 225/45R17. No mixing of wet and dry tires on the same car. Tires must be run unmodified. Effective 1-1-2024 Hankook Tires will be allowed at regional events only, through 6-30-2024."
GT2 Errors in GTCS Headings and Use of the Terms Category and ClassChange existing GTL and GTA Rules
#34453 from David Gomberg · Rule change · TB 23-12 (2023-12 Fastrack)
neutralGTL spec lines moved to contiguous position with GT2 and GT3; GTA category and spec lines renumbered and moved behind GTL.
from the current (or before) Table of Contents (TOC), to what is shown in the after TOC. GTL spec lines will now be contiguous with GT2 and 3 spec lines. GTA category and spec lines will be moved and renumbered behind GTL. GTA Section will not change but page numbers will, (as shown in Red italics). 9.1.2.F. GT-2, 3, LITE Category Specifications 314 GT2 Cars 327 GT2/ST 341 GT3 Cars 348
neutralB-Spec allows Hankook tires at regionals only through 6-30-2024; Goodyear only from 7-1-2024 for all events.
In GCR, Section 9.1.10.E.7., change as follows: "a. For the remainder of 2023, B-Spec entrants will be allowed to compete on both Hankook and Goodyear Tires. For B-Spec Tires shall be Hankook 205/50R15 C51, Hankook 200/580R15 Z217, P205/50ZR15 Goodyear Eagle RS (Dry tire) Catalog #D4850 or P205/50ZR15 Goodyear Eagle RS-R (Wet tire) Catalog #D4851. Effective 1-1-2024 Hankook Tires will be allowed at regional events only, through 6-30-2024. Effective 7-1-2024 Goodyear is the only legal specified tire allowed in B-spec for all events. For C-Spec: Tires shall be 225/45R17. No mixing of wet and dry tires on the same car. Tires must be run unmodified. Effective 1- 1-2024 Hankook Tires will be allowed at regional events only, through 6-30-2024. b. When using the Hankook wet tire, all cars get a 0.2” lower ride height allowance due to smaller radius of the wet tire."
B-Spec Update 12-19 Nissan Versa Spec Line & Adjust BOP
#35074 from Matt Wolfe · Rule change · TB 24-01 (2024-01 Fastrack)
In B-Spec Spec Lines, Nissan Versa (2012), change Model as follows: "Nissan Versa Sedan (2012-2019)" In B-Spec Spec Lines, Nissan Versa Note (2013), change as follows: Model: "Nissan Versa Note Hatchback (2013-2019)" Min Weight: "2550 2490" In B-Spec Spec Lines, Nissan Versa (2013-), delete Spec Line in its entirety.
GT2 Dodge Viper Gen 3 hybrid Kit Update Request
#35200 from Sean McCann · Rule change · TB 24-01 (2024-01 Fastrack)
slowerGT2-ST Dodge Viper hybrid kit restrictor reduced from 50mm to 45mm flat plates.
In GT2-ST Spec Lines, Dodge Viper, incl Comp Coupe, ACR/ ACR-X change NOTES as follows: 8300 OEM: "Stock OEM engine. Engine long block, valve train, and intake system must meet stock, shop manual specifications. Hybrid update including Mopar Performance Part #P5156137. May use Mopar part #5038554AF (Gen 5 Intake Manifold manifold allowed with (2) 55mm flat plates) and 8.4L mechanical throttle body allowed. VRL Front Fascia -100lbs." 8300: "Hybrid update including Mopar Performance Part # P5156137, Mopar part #5038554AF manifold and 8.4L mechanical throttle body allowed using (2) 50 45mm flat plate restrictors. VRL Front Fascia –100lbs." 8400: "Intake and Throttle Body from Mopar Performance Part # P5156137allowed using (2) 50 45mm flat plate restrictors. , Mopar part #5038554AF manifold (Gen 5 Intake Manifold allowed with (2) 50mm flat plates) VRL Front Fascia -
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100lbs 8400 OEM 3225 Stock OEM engine. Engine long block."
B-Spec Clarifying the ECU and Data Acquisition language
#35236 from Kent Carter · Rule change · TB 24-01 (2024-01 Fastrack)
neutralB-Spec and C-Spec ECU and data acquisition rules clarified: ECU must be unaltered OE, no device capable of altering ECU characteristics permitted; data acquisition expanded to allow tachometer, air-fuel ratio, cylinder head temperature sen…
In GCR, Section 9.1.10.E.37., change as follows: "ECU/PCM: OEM ECU/PCMs is required. Alternate engine calibrations are allowed. The car may meet federal emission standards, but shall provide OBD II compliant data to the data link connector. Manufacturers may provide a stability control override procedure or module. ECU/PCM: All electronic control systems (ECU/PCM/ABS, etc) must be unaltered, model- appropriate US domestic market OE devices unless otherwise permitted on the spec line. Alternate engine calibrations are allowed but no changes are permitted and no device capable of altering ECU characteristics may be present in the car from the time the car enters the grid until after impound and any stewards’ actions. OBD II compliant data correct for the car must be present at the data link connector. Malfunction codes (‘check engine light’) may be present. Manufacturers or competitors may
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submit ABS, stability control and speed limiter override procedures or modules for approval and listing on the spec line." In GCR, Section 9.1.10.E.29., change as follows: "Lap Timing and Data Acquisition Devices that perform no function other than to relay lap times to the driver (Longacre Hot Lap, Intercomp Lap Timer, etc.) are permitted, along with the required mounting hardware and connections. Stand-alone data acquisition systems (GPS or accelerometer-based) are allowed. The SCCA may install a standalone data box in a competitor’s car at any time. Refusal of the installation of the data box will result in disqualification. Analog (needle type) gauges for oil pressure, oil temp and water temp may be added as long as they are not tied into the vehicles ECU in any way. Stand alone shift lights may be added. Connections to the CAN bus are permitted for the purpose of reading CAN data to monitor vehicle and driver performance using data logging systems, dashboards and indicators. All connected systems must remain ‘silent’ on the CAN bus: they may receive data but must not send data on the BUS. GPS-based data acquisition and coaching devices are permitted. Data acquisition systems (GPS or accelerometer-based), lap timers, and coaching systems are allowed. Tachometer, shift lights, oil pressure and temperature, coolant pressure and temperature, air-fuel ratio, and cylinder head temperature sensors may be added, integrated into a data acquisition system, and/or displayed to the driver from entry into the grid until the end of impound and stewards’ actions connections to the CAN bus are permitted only for the purpose of reading CAN data to monitor and display vehicle and driver performance using data acquisition systems, dashboards and indicators. All connected systems must remain ‘silent’ on the CAN bus: they may receive data but must not be capable of sending or altering data on the bus, nor may they be capable of changing ECU behavior. Collected data may be displayed to the driver. Devices must be securely mounted. External devices may not be connected to the car during impound without the permission of a steward or tech official."
neutralFF Honda Fit gains Fast Forward FF800-100 oversize piston ring pack option.
In FF, GCR section 9.1.1.B.14.e.3.a, add the following: "The standard ring pack, PN 13011-RB1-004 (Riken) or 13011-RB1-006 (Nippon), or the oversize ring pack, PN 13021-RB7-Z01 (Riken), or 13021-RB7-Z02 (Nippon), or FF800-100 (Fast Forward), may be used."
STU ST Electric-Assisted Steering Systems
#35066 from Jose Osiris Pena · Rule change · TB 24-02 (2024-01 Fastrack)
neutralSTL and STU power steering rules clarified to permit electric-assisted and hydraulic-assisted steering systems.
In GCR, Section 9.1.4.M.16., change as follows: "Power steering may be modified in any of the following ways: a. disconnected , pump, belt, pulley, and hoses may be removed. Hoses may also be looped. Steering rack or box may be modified internally to work without pump. b. an OEM manual steering rack for that model may be fitted c. an electric power steering pump may be fitted d. an OEM electric-assisted steering system may be used or any column mounted electric steering assist may be used e. an OEM hydraulic-assisted steering system may be used"
B-Spec Split Spec Line of Automatic and Manual 2nd Gen (09-14) Fit
#35251 from Matt Wolfe · Rule change · TB 24-02 (2024-02 Fastrack)
neutralB-Spec Honda Fit MT (09-14) and AT now split into separate spec lines with distinct allowances.
In B-Spec Spec Lines, classify Honda Fit AT (09-14): "09-14 Honda Fit AT" Gear Ratios: "2.99, 1.68, 1.07, 0.76, 0.55" Final Drive: "4.56" Notes: Allow damper and spring set 51600F23SA100, Damper FR LH 51605F23SA100, Damper FR RH 51606F23SA100, Damper RR 52610F23SA100, Spring adjust asy RR 52691F23SA010. Seat upper FR spring 51688F23SA200, 51402FC4YA00 front helper spring and 51403FC4YA00 front spacer permitted. Front Damper Mount P/N 51920-F23S-A30 is allowed. Allow rear sway bar Progress # 62.1061. Allow Setrab 50-119-7612 transmission cooler in addition to OEM. Any
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aftermarket exhaust/header allowed. (Effective date 1/1/24) Any Cold Air Intake Package allowed (any manufacturer) with a 25lb adder. In B-Spec Spec Lines, Honda Fit MT (09-14) make changes as follows: Or 2.99, 1.68, 1.07, 0.76, 0.55 in automatic Or 4.56 in automatic "Alternate transmission ratio’s and final drive are for automatic equipped cars only and allow Setrab 50-119-7612 transmission cooler in addition to OEM. Any aftermarket exhaust/header allowed for the Automatic Transmission Honda Fit."
B-Spec Equalize Mazda 2 Headers and clean up spec line
#35259 from Matt Wolfe · Rule change · TB 24-02 (2024-02 Fastrack)
slowerB-Spec Mazda 2 10-14 weight increases 70 lbs to 2350, cat-delete headers now permitted.
In B-Spec Spec Lines, Mazda2 (10-14), change as follows: Weight: "Effective 3-1-2024: 2280 2350" Notes: "Helper springs F&R 0000-04-9926, Spring spacer F&R 0000-04-9925, Front sway bar end links adjstbl 0000-04- 2202, Rear sway bar 0000-04-2203-RR or 0000-04-2312, Modified strut bearing plate 0000-04-2204, Crash bolt set 0000- 04-2205, Allow rear torque bar Corksport #Mz2-3-070. Cold air intake Corksport Mz2-6-117-31100 and air duct Mz2-6- 120-10 are allowed. Effective 3-1-2024: Exhaust Header (cat delete) HB.EM 60-404-S-SS, HP-MZD001, or Mazda Motorsports PN 0000-06-2410 permitted. Powerflex PFR19-1511BX2 rear suspension bushings allowed. Allow Mazda part number 0000-01-2501-CR Radiator. Allow Mazda undertray part number DO8C-56- 110A, DO8C-56-311, DO7A-56-
fasterGT1, GT2, GT3, GTL, GTX rear spoiler maximum surface area limit of 295.0 square inches removed.
In GCR Section 9.1.2.G (GTA Category Specifications), change as follows: “9.1.2.G.III.I The single-plane rear spoiler must be mounted at an angel angle from 50 to 75 degrees (perpendicular to the ground being 90 degrees) and may not extend beyond the rear bumper when viewed from directly above the rear bumper. Spoilers must be a minimum of .063 aluminum or Lexan and may vary in overall height to match the contours of the bodywork. The rear spoiler dimensions shall not exceed 59.0 inches wide by 5.0 inches in height, (measured on the material surface) , or 295.0 square inches total surface area. Braces to prevent spoiler deflection are allowed, but may serve no other purpose.”
B-Spec Rear Sway Bar Request for Nissan Versa and Versa Note 2013-
#35323 from Richard Osborne · Rule change · TB 24-02 (2024-02 Fastrack)
neutralB-Spec Nissan Versa and Versa Note 2013-2019 now permit Hardrace HR-Q0146 19mm rear sway bar.
In B-Spec Spec Lines, Nissan Versa (2013-), change as follows: Model: "Nissan Versa (2013-2019)" Notes: "Hardrace HR-Q0146 19mm rear sway bar permitted." In B-Spec Spec Lines, Nissan Versa Note (2013-), change as follows: Model: "Nissan Versa Note (2013-2019)" Notes: "Hardrace HR-Q0146 19mm rear sway bar permitted."
B-Spec Eliminate Redundant Trans Cooler Rule
#35353 from Matt Wolfe · Rule change · TB 24-02 (2024-01 Fastrack)
neutralB-Spec and C-Spec eliminate case-by-case auxiliary transmission cooler approval requirement.
In GCR, Section 9.1.10.E.44., eliminate and renumber accordingly: "44. Auxiliary transmission coolers may be approved on a case by case basis. Part numbers must be submitted and added to the cars spec line."
B-Spec Fix Sonic Hatchback MT Spec Line
#35371 from Jonathan Wickert · Rule change · TB 24-02 (2024-01 Fastrack)
neutralB-Spec Chevrolet Sonic 5dr Hatch MT allows aluminum radiator #ZZP-ZZ013.
In B-Spec Spec Line, Chevrolet Sonic 5dr Hatch MT (12-19), add to Notes the following: "Allow Aluminum Radiator #ZZP-ZZ013."
GT2 REDUCE C6 CORVETTE WEIGHT WITH OEM 7 LITER ENGINE REDUCE BY 150LB
#35385 from Mike McGinley · Rule change · TB 24-02 (2024-02 Fastrack)
fasterGT2 Chevrolet Corvette 7011 OEM 7 liter weight reduced 150 lbs, to 3125 lbs.
In GT2/ST Chevrolet Corvette 7011 OEM change weight as follows: “3275 3125“
GT2 GT Direct Injection allowance and rules
#35437 from Grand Touring Committee · Rule change · TB 24-02 (2024-01 Fastrack)
fasterGT1/GT2/GT3/GTL/GTX Direct Injection now permitted if OE, using only OE pump, hoses, injectors.
In GCR, Section 9.1.2.F.7.5.E. change as follows: “Direct Injection is not permitted only if it came OE and must be installed using only OE high pressure pump(s), hard and soft hoses and injectors.”
GT2 GT2/3 remove Direction Injection not allowed in Spec line notes
#35439 from Grand Touring Committee · Rule change · TB 24-02 (2024-02 Fastrack)
fasterGT2/3 Nissan, Mazda, Mitsubishi 4G93, QR25DE/DD, QE25DE/DD Direct Injection now permitted per 9.1.2.F.7.5.E.
In GT2/3 modify Spec Line notes as follows: GT2: Nissan: “Direct Injection not permitted, may be used per 9.1.2.F.7.5.E.” GT3: Mazda: “Direct Injection not permitted, may be used per 9.1.2.F.7.5.E.” Mitsubishi 4G93: “Direct Injection not permitted, may be used per 9.1.2.F.7.5.E. ” Nissan QR25DE/DD 1988cc: “Direct Injection not permitted, may be used per 9.1.2.F.7.5.E.” Nissan QE25DE/DD 2489cc: “Direct Injection not permitted, may be used per 9.1.2.F.7.5.E.”
Cal Club 2024 → Cal Club 2025 2024-02-23 to 2025-02-22
GT2 Classify Corvette C8 (2020- ) into GT2/ST
#33759 from Andrew Aquilante · Rule change · TB 24-03 (2024-03 Fastrack)
neutralChevrolet Corvette C8 (2020–) classified into GT2-ST with 6162cc displacement, 3300 lbs minimum weight, 71mm restrictor.
In GT2 Spec Lines, classify Chevrolet Corvette C8 (20-) as follows: GT2-ST Maximum Displacement Minimum Weight Restrictor Notes Chevrolet Corvette C8 (20-) 6162 3300 71mm - Flat Plate LT2 engine.
Applies to Chevrolet Corvette on this page: Igor Lyustin
B-Spec BOP Adjustment for Yaris iA, 2020+ Versa, and 07-08 Honda Fit
#35382 from Matt Wolfe · Rule change · TB 24-03 (2024-03 Fastrack)
fasterB-Spec Honda Fit 07-08 loses 125 lbs to 2400; Versa S 2020+ loses 150 lbs to 2550; Yaris iA 16-20 loses 250 lbs to 2450.
In B-Spec Spec Lines, Honda Fit (07-08), change as follows: Min weight: "2525 2400" Notes: "Any Cold Air Intake Package allowed (any manufacturer). This configuration is not currently eligible for Runoffs competition. This car must compete in three (3) separate Super Tour weekends so that performance data can be collected. In addition to SCCA data box, OBDII data collected via an AIM or similar device must be submitted." In B-Spec Spec Lines, Honda Fit (07-08) Automatic, change as follows: Min weight: "2525 2400" Add to Notes: "Any Cold Air Intake Package allowed (any manufacturer). This configuration is not currently eligible for Runoffs
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competition. This car must compete in three (3) separate Super Tour weekends so that performance data can be collected. In addition to SCCA data box, OBDII data collected via an AIM or similar device must be submitted." In B-Spec Spec Lines, Nissan Versa S (2020-), change as follows: Min weight: "2700 2550" Add to Notes: "This configuration is not currently eligible for Runoffs competition. This car must compete in three (3) separate Super Tour weekends so that performance data can be collected. In addition to SCCA data box, OBDII data collected via an AIM or similar device must be submitted." In B-Spec Spec Lines, Toyota/Scion IA Sedan (16-20), change as follows: Min weight: 2700 2450" Add to Notes: "This configuration is not currently eligible for Runoffs competition. This car must compete in three (3) separate Super Tour weekends so that performance data can be collected. In addition to SCCA data box, OBDII data collected via an AIM or similar device must be submitted."
GT2 Requesting classification for a 2015 Mitjet ST in GT2
#35408 from Jim Froula · Rule change · TB 24-03 (2024-03 Fastrack)
neutral2015 Mitjet ST added to GT2, must run per VTS specifications with complete FIA form CdM008.
In GT2 Spec Lines, GT Cars - MITJET ST, classify MITJET ST as follows: GT Cars – MITJET ST Model Years Body Style Drive- line Wheel- base (in) Notes MITJET ST 2015 RWD 94.5 Must run per VTS specifications. Must have
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complete car Specifications (FIA form CdM008) at every entered race event.
neutralSTU Mini Cooper S SC: alternate LEAP OMICRON hood scoop LEP-OMICRON3 permitted.
In STU Spec Lines, Mini Cooper S SC with Minimum Weight 1900 and 2100, add to Notes: "Alternate LEAP OMICRON hood scoop part # LEP-OMICRON3 is permitted."
neutralB-Spec Honda Fit 07-08 rear sway bar part number changed to Progress #62.1060.
In B-Spec Spec Lines, Honda Fit (07-08) Automatic, change Notes as follows: "Allow rear sway bar Progress # 62.1061 0." In B-Spec Spec Lines, Honda Fit (07-08), add to Notes the following: "Allow rear sway bar Progress # 62.1060."
B-Spec Change restrictor from 30mm to 31mm (2015+ Honda Fit) and add 50#
#34857 from Matt Downing · Rule change · TB 24-04 (2024-04 Fastrack)
fasterB-Spec Honda Fit MT 2015-19 restrictor increases 30mm to 31mm, weight rises 2525 to 2550 lbs.
In B-Spec Spec Lines, Honda Fit MT (15-19), change as follows: Weight: ""2525 2550" Notes: "30 31mm" In B-Spec Spec Lines, Honda Fit MT (15-19), change as follows: Weight: ""2525 2550" Notes: "30 31mm"
B-Spec Wheel Offset and Spacer Revision
#35466 from Kent Carter · Rule change · TB 24-04 (2024-04 Fastrack)
fasterB-Spec and C-Spec now permit wheels of any offset if tire doesn't protrude beyond fender; spacers allowed with differing left-right offsets per axle.
In GCR, Section 9.1.10.E.8., change as follows: "Wheels: All wheels shall be one-piece metal castings or metal two piece welded. Wheels of any offset are permitted provided the tire tread (the portion of the tire that contacts the ground) does not protrude beyond the fender opening when viewed from the top perpendicular to the ground. Wheel spacers and aftermarket wheel studs/bolts are permitted. Wheel bolts may be replaced with studs and nuts. Total offset must be the same left to right for an individual axle but may differ from front to rear. For B-Spec Required wheel/rim diameter is fifteen inches (15”). Maximum wheel/rim width is seven inches (7”). Minimum Wheel/rim weight shall be 13 lbs. For C-Spec Required wheel/ rim diameter is seventeen inches (17”). Maximum wheel/rim width is eight inches (8”). Minimum
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Wheel/rim weight shall be 17 lbs. All wheels shall be one-piece metal castings or metal two piece welded. All four wheels must be the same dimensional offset. Aftermarket wheel studs and/or wheel bolts are allowed. Wheel bolts may be replaced with studs and nuts. Wheel spacers are allowed, the same thickness spacer must be used on all four corners. "
neutralB-Spec Mini Cooper Countryman R60, Paceman R61, and Nissan Versa 1797cc spec lines expire 1/1/2025 unless appealed by 12/1/2024.
In B-Spec Spec Lines, Mini Cooper Countryman (R60) (11-16), add to Notes the following: ”**This Spec line will expire 1/1/2025 unless an appeal is filed on or before 12/1/2024.**” In B-Spec Spec Lines, Mini Cooper Paceman (R61) (11-16), add to Notes the following: ”**This Spec line will expire 1/1/2025 unless an appeal is filed on or before 12/1/2024.** ” In B-Spec Spec Lines, Nissan Versa (07-11) with 1797cc engine, add to Notes the following: ”**This Spec line will expire 1/1/2025 unless an appeal is filed on or before 12/1/2024.** ”
Applies to Mini Cooper on this page: Trenton Kramer, Thomas Lepper
neutralB-Spec model descriptions standardized: trim levels and door count designations removed or replaced with body style wording.
In B-Spec Spec Lines, change Model description as follows: "Chevrolet Sonic 4dr Sedan MT (12-19)" "Chevrolet Sonic 4dr Sedan AT (12-19)" "Chevrolet Sonic 5dr Hatch Hatchback MT (12-19)" "Chevrolet Sonic 5dr Hatch Hatchback AT (12-19)" "Ford Fiesta 5dr Hatchback (11-19)" "Ford Fiesta 4dr Sedan (11-19)" "Honda Fit MT (07-08)"
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"Honda Fit Automatic AT (07-08)" "Honda Fit MT (09-14)" "Hyundai Accent GS Hatchback (12-19)" "Kia Rio 5-door/LX Hatchback (12-19)" "Nissan Versa S (2020-)" "Toyota Yaris Hatchback (07-11)" "Toyota Yaris Hatchback (12-18)"
GT2 Request to Eliminate the FPR from the Corvette (-2013) with LS2
#35878 from Michael Quattlebaum · Rule change · TB 24-05 (2024-05 Fastrack)
fasterGT2-ST Corvette 14-19 LS2 restrictor increases from 78mm to 80mm flat plate.
In GT2-ST Spec Lines, Chevrolet Corvette (14-19), change Restrictor as follows: "78 80mm flat plate"
neutralB-Spec and C-Spec wheels must be same thickness spacers all four corners; wording clarified on offset and protrusion rules.
In GCR, Section 9.1.10.E.8., change as follows: "Wheels: All wheels shall be one-piece metal castings or metal two piece welded. All four wheels must be the same dimensional offset. Any offset is permitted so long as Wheels of any offset are permitted provided the tire tread (the that portion of the tire that contacts the ground) does may not protrude beyond the fender opening when viewed from the top perpendicular to the ground. Wheel spacers and aA ftermarket wheel studs/ and or wheel bolts are permitted allowed. Wheel bolts may be replaced with studs and nuts. Wheel spacers are allowed, but must be the same thickness on all four corners.Total offset must be the same left to right for an individual axle but may differ from front to rear. B-Spec Required wheel/rim diameter is fifteen inches (15”). Maximum wheel/rim width is seven inches (7”). Minimum
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Wheel/rim weight shall be 13 lbs. C-Spec Required wheel/rim diameter is seventeen inches (17”). Maximum wheel/rim width is eight inches (8”). Minimum Wheel/rim weight shall be 17 lbs. Wheels are permitted any offset provided the tire tread (that portion of the tire that contacts the ground) does not protrude beyond the fender opening when viewed from the top perpendicular to the ground."
neutralB-Spec Mazda2 and multiple Mini Cooper models eliminate redundant sway bar end link part number notes.
B-SPEC Spec Lines, elimination from Notes the following: Mazda2 (10-14): "Front sway bar end links adjstbl 0000-04-2202," Mini Cooper Hatchback (R50) MT (02 - 06): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable sway bar links part number 35 50 6 772 is allowed." Mini Cooper Hatchback (R50) CVT (02 - 06): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable sway bar links part number 35 50 6 772 is allowed." Mini Cooper (R56) MT (07-10): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable sway bar links part number 35 50 6 772 is allowed."
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Mini Cooper (R56) AT (07-10): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable sway bar links part number 35 50 6 772 is allowed." Mini Cooper Clubman (R55) (07 - 10): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable sway bar links part number 35 50 6 772 is allowed." Mini Cooper (R56LCI) MT (11-13): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable sway bar links part number 35 50 6 772 is allowed." Mini Cooper (R56LCI) AT (11-13): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable sway bar links part number 35 50 6 772 is allowed." Mini Cooper Countryman (R60) (11-16): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable sway bar links part number 35 50 6 772 is allowed." Mini Cooper Paceman (R61) (11-16): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable sway bar links part number 35 50 6 772 is allowed." Mini Cooper Clubman (R55) (11-15): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable sway bar links part number 35 50 6 772 is allowed." Mini Cooper Coupe (R58) (12-15): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable sway bar links part number 35 50 6 772 is allowed."
neutralB-Spec Nissan Versa (09-11) spec line expires 1/1/2025 unless appeal filed by 12/1/2024.
In B-Spec Spec Lines, Nissan Versa (09-11), add to notes the following: "**This Spec line will expire 1/1/2025 unless an appeal is filed on or before 12/1/2024.**"
neutralGT2-ST allows aftermarket replacement differential housings if exact equivalents.
In GCR Section, Appendix K. 2012.M2, add the following: "After market replacement differential housings are permitted as long as they are an exact equivalent."
B-Spec Correct error for rear brakes of Hyundai/Kia
neutralB-Spec Hyundai Accent rear brakes corrected to 10.3 disc; Kia Rio rear brakes corrected to 10.3 disc.
In B-Spec Spec Lines, Hyundai Accent Hatchback (12-19), change brakes as follows: "(R) 9.9 drum or 10.3 drum disc" In B-Spec Spec Lines, Kia Rio Hatchback (12-19), change brakes as follows: "(R) 10.3 drum disc"
GT2 GT4 cars may run in GT2-ST
#36235 from Grand Touring Committee · Rule change · TB 24-07 (2024-07 Fastrack)
neutralGT4 cars now permitted in GT2-ST with factory restrictor, must comply with 2012 STO rules, slicks allowed with 100-pound penalty.
In 9.1.2. GT2 Spec Lines, GT3 Cars, change Note as follows: "Note: All GT4 cars are permitted to compete in GT2-ST provided they use a factory supplied power stick or Pro Series required restrictor. Must have GT4 rules in possession at all race events. Cars must comply with 2012 STO rules as stated in Appendix K of the GCR. Engine Displacements in this table are nominal. Each competitor shall have available definitive documentation (e.g., factory manual) of the original displacement for the engine used. Slicks allowed on all GT2/ST cars with a 100-pound weight penalty."
neutralB-Spec and C-Spec restricted to Goodyear Eagle RS/RS-R P205/50R15 and 225/45R17 tires respectively; Hankook tires removed; wet/dry mixing prohibited.
In GCR Section 9.1.10.E.7. change as follows: "a. For the remainder of 2023, B-Spec entrants will be allowed to compete on both Hankook and Goodyear Tires. For B- Spec: tires shall be Hankook 205/50R15 C51, Hankook 200/580R15 Z217, P205/50Z R15 Goodyear Eagle RS (Dry tire) Catalog #D4850 or P205/50ZR15 Goodyear Eagle RS-R (Wet tire) Catalog #D4851. Effective 1-1-2024 Hankook Tires will be allowed at regional events only, through 6-30-2024. Effective 7-1-2024 Goodyear is the only legal specified tire allowed in B-spec for all events. Mixing wet and dry tires is not permitted. Tires may not be modified. All B-Spec competitors are required to place two (2) 12-inch or larger “Goodyear” decals on their cars, one on each side of the car above the front tire. C-Spec: Tires shall be 225/45R17. No Mixing of wet and dry tires on the same car is not permitted. Tires must be run unmodified.
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b. When using the Hankook wet tire, all cars get a 0.2” lower ride height allowance due to smaller radius of the wet tire."
fasterB-Spec Sonic restrictors increased to 5-6mm, Fit weight cut 50-25 lbs, Mini Cooper weight reduced 45 lbs, various restrictor adjustments.
In B-Spec Spec Lines, change as follows: Chevrolet Sonic Sedan AT Notes: "33 5mm" Chevrolet Sonic Hatchback AT Notes: "34 6mm" Honda Fit AT (07-08) Weight (lbs): "2400 2350" Notes: "Any aftermarket header allowed."
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Honda Fit AT (09-14) Weight: "2525 2500" Notes: "Any Cold Air Intake Package allowed (any manufacturer) with a 25lb adder." Honda Fit CVT (15-19) Notes: "31 3mm" Mini Cooper Hatchback (R50) CVT (02-06) Weight (lbs): "2545 2500" Mini Cooper (R56) AT (07-10) Notes: "44 6mm (OE Catalyst) or 40 2mm (Header)" Mini Cooper (R56LCI) AT (11-13) Notes: "43 5mm (OE Catalyst) or 41mm (Header)"
B-Spec Require hood pins
#36233 from Frank Schwartz · Rule change · TB 24-08 (2024-08 Fastrack)
neutralB-Spec and C-Spec hood pins change from optional to recommended; factory release cable may be removed if pins used.
In GCR, Section 9.1.10.E.41., change as follows: "Optional Hood Pins may be added to supplement the original hood latch system. All parts of the original hood latch system must remain in the car. Installation of hood pins is recommended but not required. If hood pins are used, the factory release and cable must be removed, but the secondary latch may be retained. Vehicles equipped with plastic release cables may replace them with steel units. The OEM hood release latch may be relocated."
B-Spec Sonic Caliper Pistons
#36238 from Jonathan Wickert · Rule change · TB 24-08 (2024-08 Fastrack)
neutralB-Spec and C-Spec Chevrolet Sonic and Cruze allow Babyface Fabrication brake caliper pistons.
In B-Spec Spec Lines, change Chevrolet Sonic Sedan MT (12-19), add to Notes the following: "Allow Babyface Fabrication brake caliper piston SNC-SS." In B-Spec Spec Lines, change Chevrolet Sonic Sedan AT (12-19), add to Notes the following: "Allow Babyface Fabrication brake caliper piston SNC-SS." In B-Spec Spec Lines, change Chevrolet Sonic Hatchback MT (12-19), add to Notes the following: "Allow Babyface Fabrication brake caliper piston SNC-SS." In B-Spec Spec Lines, change Chevrolet Sonic Hatchback AT (12-19), add to Notes the following: "Allow Babyface Fabrication brake caliper piston SNC-SS."
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In C-Spec Spec Lines, change Chevrolet Cruze (2010-16), add to Notes the following: "Allow Babyface Fabrication brake caliper piston CRZ-SS."
STU RWD Turbo Disadvantage
#36255 from David Fiorelli · Rule change · TB 24-08 (2024-08 Fastrack)
fasterSTU RWD turbo cars no longer required to reduce restrictor by 1 mm from table.
In GCR, Section 9.1.4.1.H.3 - Inlet Restrictor (mm) Minimum Weight (lbs) table, change as follows: "RWD cars must reduce restrictor 1 mm from this table"
FF Update to FF EGR Blanking Plate Rule
#36633 from Matt Boian · Rule change · TB 24-10 (2024-10 Fastrack)
neutralFF VTEC activation valve must function; EGR blanking plate rule clarified with Fast Forward part numbers.
In FF, GCR section 9.1.1.B.14.r.1, change as follows: "All emission control devices must be removed and blocked off by the blanking plate provided by HPD or Fast Forward as noted below, except for the VTEC activation valve. The VTEC activation valve must be retained; and it must be functioning. No modifications are permitted. a. EGR Plate: Fast Forward PN: FF200-301. b. EGR Port Cover: Fast Forward PN: FF200-302."
B-Spec Scion IA/Toyota Yaris/Mazda 2 DY chassis suspension
unclearB-Spec Toyota/Scion IA Sedan 16-20 allows ST Suspension Kit 13275022, requires three Super Tour weekends and OBD-II data submission.
In B-Spec Spec Lines, Toyota/Scion IA Sedan (16-20), change Notes as follows: "38mm FPR. (Effective 11/1/2024) Allow ST Suspension Kit 13275022. This configuration is not currently eligible for Runoffs competition. This car must compete in three (3) separate Super Tour weekends so that performance data can be collected. In addition to SCCA data box, OBDII data collected via an AIM or similar device must be submitted."
fasterHonda Fit AT 07-08 B-Spec and C-Spec: rear sway bar Progress #62.1060 and any cold air intake package now allowed.
In B-Spec Spec Lines, Honda Fit AT 07-08, change Notes as follows: "(Effective 11/1/2024) Allow damper and spring set 51600F23SA100, Damper FR LH 51605F23SA100, Damper FR RH 51606F23SA100, Damper RR 52610F23SA100, Spring adjust asy RR 52691F23SA010. Seat upper FR spring 51688F23SA200, 51402FC4YA00 front helper spring and 51403FC4YA00 front spacer permitted. Front Damper Mount P/N 51920-F23S-A30 is allowed. Allow rear sway bar Progress # 62.1060. Any Cold Air Intake Package allowed (any manufacturer). This configuration is not currently eligible for Runoffs competition. This car must compete in three (3) separate Super Tour weekends so that performance data can be collected. In addition to SCCA data box, OBDII data collected via an AIM or similar device must be submitted."
FF Change FF/FC Weight with Sequential Gearbox
#36651 from Robert Wright · Rule change · TB 24-11 (2024-11 Fastrack)
fasterFF and FC cars with sequential gearbox must add 10 lbs. to minimum weight, down from 25 lbs.
In FF, GCR section 9.1.1.B.20.A.3, change as follows: "Cars running with a sequentially shifted gear box shall must add 25 10 lbs. to minimum weight." In FC, GCR section 9.1.1.B.20.B.4, change as follows: "Cars running with a sequentially shifted gear box shall must add 25 10 lbs. to minimum weight."
slowerSTU Mini Cooper S SC 1900 restricts to 2.565 diameter pulley; 2100 allows 2.285 diameter pulley.
In STU Spec Lines, Mini Cooper S SC, add to notes: 1900: "Stock supercharger pulley. 2.565 diameter." 2100: "JCW Pulley permitted. May run a 2.285 diameter pulley."
FF Alternative Oversize Honda Fit Pistons
#37064 from Formula/Sports Racing Committee · Rule change · TB 24-11 (2024-11 Fastrack)
neutralFF Honda Fit allows Fast Forward 0.25mm oversize pistons PN FF800-110 as alternative; piston diameter spec clarified to 2.8835 inches.
In FF, GCR section 9.1.1.B.14.e.1, change as follows: "Honda Fit OEM standard size pistons, PN: 13010-RB1-000, or Honda Fit OEM 0.25mm oversize pistons, PN: 13020-RB7-Z00, or Fast Forward 0.25mm oversize pistons, PN: FF800-110, may be used." In GCR section 9.1.1.B.14.e.2, change as follows: "a. Maximum standard piston diameter, measured at a point 16mm from the bottom of the skirt: 73.240mm (2.8834 2.8835 inches). b. Centerline of wrist pin to crown maximum: 26.21mm (1.032 inches). c. Maximum overall height from skirt to crown edge: 47.80mm (1.882 inches).
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d. Minimum weight: 198.0 grams (6.984 ounces). e. Minimum weight of piston pin: 66 grams (2.25 ounces). f. Combined minimum weight of piston, piston pin and connecting rod: 543.5 grams (18.85 ounces). g. Combined minimum weight of piston, wrist pin, and circlips: 267 grams (9.418 ounces). h. Centerline of wrist pin to crown edge: 26.289mm (1.035 inches). i. Ring groove widths: Top ring groove: 1.003mm (0.0395 inches). Middle ring groove: 1.016mm (0.0400 inches). Oil ring groove: 1.981mm (0.0780 inches). j. Ring groove distance from wrist pin center to bottom of groove: Top ring groove: 19.63mm (0.7730 inches). Middle ring groove: 15.29mm (0.6020 inches). Oil ring groove: 10.91mm (0.4295 inches)."
STU Request to Remove Miata Hubs from General category
#37138 from Christopher Childs · Rule change · TB 24-12 (2024-12 Fastrack)
neutralSTL/STU: 90-05 Mazda Miata alternate front wheel hubs moved from General to specific part approval.
In GCR, Section 9.1.4.M.18., change as follows: "18. Allow alternate front wheel front hubs, Mazda Motorsports Development Part #0000-04-5HUB-S1, for the 90-05 Mazda Miata: Mazda Motorsports Development Part #0000-04-5HUB-S1."
STU BMW N54/N55 Engine Allowance
#37146 from Martin Sarukhanyan · Rule change · TB 24-12 (2024-12 Fastrack)
slowerSTU BMW N54/N55 turbo inlet restrictors now required per GCR definition; turbo swapping prohibited.
"Turbo inlet restrictors designed per GCR Appendix F Technical Glossary definition of “Turbo Inlet Restrictor” may be required; see table 9.1.4.1.H.h.2 3. Swapping of turbochargers between engine makes and models is prohibited. Supercharged cars may be approved on a case-by-case basis; twin turbo engines are allowed on a case-by-case basis only. Contact the Road Racing Technical Office for details. Twin turbo engines may be converted to single turbo using one of the allowed alternate turbos (see 9.1.4.1.H.3 2). Aftermarket turbocharger and supercharger kits will be allowed on a case-by-case basis.
B-Spec Remove wheelbase from spec lines and replace with Restrictor
unclearB-Spec and C-Spec cars replace wheelbase spec with induction restrictor (mm) values, effective 2025-01-01.
In B-Spec Spec Lines that are not expiring on 1/1/25, replace Wheelbase as follows: "(Effective 1/1/2025)Wheelbase Restrictor (mm)" In B-Spec Spec Lines, update the value in the spec lines under the Restrictor column as follows effective 1/1/2025: Chevrolet Sonic Sedan MT (12-19): "2525 33" Chevrolet Sonic Sedan AT (12-19): "2525 35" Chevrolet Sonic Hatchback MT (12-19): "2525 34" Chevrolet Sonic Hatchback AT (12-19): "2525 36" Fiat 500 (12-17): "2300"
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Ford Fiesta Hatchback (11-19): "2470 39" Ford Fiesta Sedan (11-19): "2470 38" Honda Fit MT (07-08): "2450" Honda Fit AT (07-08): "2450" Honda Fit MT (09-14): "2500" Honda Fit AT (09-14): "2500" Honda Fit MT (15-19): "2530 31" Honda Fit CVT (15-19): "2530 33" Hyundai Accent Hatchback (12-19): "2570 41" Kia Rio Hatchback (12-19): "2570 41" Mazda2 (10-14): "2490" Mini Cooper Hatchback (R50) MT (02-06): "2466" Mini Cooper Hatchback (R50) CVT (02-06): "2466" Mini Cooper (R56) MT (07-10): "2466 44 (OE Catalyst) 40 (Header)" Mini Cooper (R56) AT (07-10): "2466 46 (OE Catalyst 42 (Header)" Mini Cooper Clubman (R55) (07-10): "2547 44 (OE Catalyst) 40 (Header)" Mini Cooper (R56LCI) MT (11-13): "2466 43" Mini Cooper (R56LCI) AT (11-13): "2466 43" Mini Cooper Clubman (R55) (11-15): "2547 42" Mini Cooper Coupe (R58) (12-15): "2466 42" Nissan Micra Cup Cars (Canadian): "2450" Nissan Versa Sedan (2012-2019): "2600" Nissan Versa Hatchback (2012-2019): "2600" Nissan Versa (2020-): "2618 38" Toyota/Scion IA Sedan (16-20): "2570 38" Toyota Yaris Hatchback (07-11): "2461 42" Toyota Yaris Hatchback (12-18): "2510 42" Toyota Yaris Sedan (07-12): "2550 41"
STU Audi 1.8t Wagon STU Table B
#36685 from Mike McLaughlin · Rule change · TB 25-01 (2025-01 Fastrack)
fasterSTU Audi 1.8T wagon deleted; Porsche 944 1800 weight to Chart, turbo inlet restrictor removed.
In STU Spec Lines, Table B: Alternate Vehicle and Engine Requirements, delete Audi/VW 1.8 Turbo in its entirety. In STU Spec Lines, Table B: Alternate Vehicle and Engine Requirements, Porsche 944 w/Max Displacement 1800, change as follows: Weight: "3050 Chart" Notes: "VW/Audi 1.8L 35mm turbo engine permittedinlet restrictor required."
GT2 Panoz Esperante GTS BOP
#36686 from Brian Goldburg · Rule change · TB 25-01 (2025-01 Fastrack)
In GT2 SPEC LINES, GT Engines - PANOZ, classify 2013-2016 Ford EcoBoost Twin Turbo as follows: GT Engines – PANOZ Engine Family Engine Type Bore x Stroke (in.) Disp.
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(CC) Head Type Valves /
A specification table follows in the original; it is not shown here.
B-Spec Bilstein Rear Shock Request for Hyundai Accent/Kia Rio
#36965 from Alex Ratcliffe · Rule change · TB 25-01 (2025-01 Fastrack)
neutralB-Spec Hyundai Accent and Kia Rio approve Bilstein B8 shock 33-187112 for rear suspension use.
In B-Spec Spec Lines, Hyundai Accent Hatchback (12-19), add to Notes the following: "Bilstein B8 shock 33-187112 approved for use in rear suspension." In B-Spec Spec Lines, Kia Rio Hatchback (12-19), add to Notes the following: "Bilstein B8 shock 33-187112 approved for use in rear suspension."
GT2 Correct language regarding OEM Areo Devices
#37137 from Christopher Childs · Rule change · TB 25-01 (2025-01 Fastrack)
In GCR, Section APPENDIX L. 2013 TA2 TECHNICAL REGULATIONS, B.2.c., change as follows: "B. Aerodynamic Devices 2. Rear wing c. The entire rear wing assembly, including the end plates and any Gurney flap, shall be mounted level with, or below, the peak of the roof. OEM aerodynamic devices do not need to adhere to the height rule."
A specification table follows in the original; it is not shown here.
GT2 GT2 Sunbeam Tiger Alternate Carburetor
#37198 from Tom Patton · Rule change · TB 25-01 (2025-01 Fastrack)
In GT2 Spec Lines, GT Engines - SUNBEAM, add to Fuel Induction as follows: "Carburetors(s) Holly 650 cfm PN #80541-1 and PN #80541-2"
STU Merger GT3 to STU
#37486 from Club Racing Board · Rule change · TB 25-01 (2025-01 Fastrack)
neutralSTU-GT3 reclassified as STU-GT3U effective January 1, 2026.
In STU, Table C, change STU-GT3 charge as follows: "(Effective January 1, 2026) TABLE C: STU-GT3U"
STU GT3 TCR Tire allowance
#37494 from Club Racing Board · Rule change · TB 25-01 (2025-01 Fastrack)
slowerSTU GT3 TCR gains 275-width tire option with 100 lb weight penalty, but not in A compound.
In STU, Table C, GT3 TCR, add to Notes the following: "May run DOT approved tire with maximum section width of 275 with 100 pound weight adder. May not run A compound with 275."
#36538 from Jorge A Nazario · Rule change · TB 25-02 (2025-02 Fastrack)
fasterGT2 STO aftermarket ABS weight penalty reduced from 100 lbs to 50 lbs.
In GCR, Appendix K. 2012 STO Rules, O.9., change as follows: "May run OEM ABS or convert to an aftermarket ABS controller with 100 50 lb. weight penalty."
B-Spec Remove Redundant Language from Notes Sections
neutralB-Spec Honda Fit AT, Fit CVT, Mazda2, Mini Cooper R50 MT and CVT, Toyota Yaris remove redundant notes language.
In B-Spec Spec Lines, Honda Fit AT (07-08), change Notes as follows: "Allow damper and spring set 51600F23SA100, Damper FR LH 51605F23SA100, Damper FR RH 51606F23SA100, Damper RR 52610F23SA100, Spring adjust asy RR 52691F23SA010. Seat upper FR spring 51688F23SA200, 51402FC4YA00 front helper spring and 51403FC4YA00 front spacer permitted. Front Damper Mount P/N 51920-F23S-A30 is allowed. Allow rear sway bar Progress # 62.1060. Any Cold Air Intake Package allowed (any manufacturer). This configuration is not currently eligible for Runoffs competition. This car must compete in three (3) separate Super Tour weekends so that performance data can be collected. In addition to SCCA data box, OBDII data collected via an AIM or similar device must be submitted. Any aftermarket header allowed. Allow rear sway bar Progress # 62.1060. Any Cold Air Intake Package allowed (any manufacturer). This configuration is
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not currently eligible for Runoffs competition. This car must compete in three (3) separate Super Tour weekends so that performance data can be collected. In addition to SCCA data box, OBDII data collected via an AIM or similar device must be submitted." In B-Spec Spec Lines, Honda Fit CVT (15-19), change Notes as follows: "Allow damper FR LH 51605F23SA81, Damper FR RH FR RH 51606F23SA81, Damper RR 52610F23SA80, Spring adjust assy RR 52691F23SA80, Camber Adjuster Comp, Damper 51920F23SA82. Exhaust pipe assy 18300F23SA81, ACG belt (6PK858) 31110FC4YA80. Allow rear sway bar Progress 62.1063. Allow Setrab 50- 119-7612 transmission cooler in addition to OEM." In B-Spec Spec Lines, Mazda2 (10-14), change Notes as follows: "Helper springs F&R 0000-04-9926, Spring spacer F&R 0000-04-9925, Rear sway bar 0000-04-2203-RR or 0000-04- 2312, Modified strut bearing plate 0000-04-2204, Crash bolt set 0000-04-2205, Allow rear torque bar Corksport #Mz2-3-070. Cold air intake Corksport Mz2-6-117-31100 and air duct Mz2-6-120-10 are allowed. Exhaust Header (cat delete) HB.EM 60-404- S-SS, HP-MZD001, or Mazda Motorsports PN 0000- 06-2410 permitted. Powerflex PFR19-1511BX2 rear suspension bushings allowed. Allow Mazda part number 0000-01-2501-CR Radiator. Allow Mazda undertray part number DO8C-56-110A, DO8C-56- 311, DO7A-56-321." In B-Spec Spec Lines, Mini Cooper Hatchback (R50) MT (02-06), change Notes as follows: "Allow KW: Coilover Kit: Variant 2: Gen 1 or KW equivalent, Vorshlag Mini R50/53 Camber Plates & Perches allowed. Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches. Allow rear sway bar Progress #62.0210." In B-Spec Spec Lines, Mini Cooper Hatchback (R50) CVT (02-06), change Notes as follows: "Allow KW: Coilover Kit: Variant 2: Gen 1 or KW equivalent, Vorshlag Mini R50/53 Camber Plates & Perches allowed. Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches. Allow rear sway bar Progress #62.0210.CVT equipped cars allow Setrab 50-119-7612 transmission cooler in addition to OEM." In B-Spec Spec Lines, Toyota Yaris Hatchback (07-11), change Notes as follows: "PTR04-52061 TRD Sport shocks permitted. PTR11-52070 TRD spring kit permitted. Speed sensor may be disconnected. Cold air intake K&N 69-8612TFK is allowed. Rear Swaybar PTR11-52071 is allowed. Any Camber plate is permitted."
Applies to Mini Cooper on this page: Trenton Kramer, Thomas Lepper
Applies to Toyota Yaris on this page: Joseph Gersch
neutralB-Spec removes Mini Cooper Countryman R60, Cooper Paceman R61, and two Nissan Versa generations effective 2/1/25.
In B-Spec Spec Lines, delete the following spec lines effective 2/1/25 in their entirety: "Mini Cooper Countryman (R60) (11-16)" "Cooper Paceman (R61) (11-16)" "Nissan Versa (07-11)" "Nissan Versa (09-11)"
B-Spec Set expiration date for Nissan Micra Cup Cars (Canadian)
neutralB-Spec Nissan Micra Cup Car spec line expires 7/1/25 unless appeal submitted by 6/30/25.
In B-Spec Spec Lines, Nissan Micra Cup Car, add to Notes the following: "This spec line will expire on 7/1/25 unless an appeal is submitted by 6/30/25."
Cal Club 2025 → Cal Club 2026 2025-02-22 to 2026-02-21
GT2 Hood Bulge allowed
#37000 from Gordon Leslie · Rule change · TB 25-03 (2025-03 Fastrack)
unclearGT2 Pontiac Fiero changes from FWD to RWD; hood bulge permitted for front engine relocation.
In GT2 Spec Lines, GT2 Cars - PONTIAC, Fiero, change as follows: Drive-line: "FWD RWD" Add to Notes: "Hood bulge permitted as requested for front engine relocation only."
STU BMW N54/N55 Engine Allowance Follow Up
#37447 from Martin Sarukhanyan · Rule change · TB 25-03 (2025-03 Fastrack)
neutralSTU BMW N54/N55 3.0L classified at Chart +3% minimum weight; N54 twin turbo not allowed.
In STU Spec Lines, Table A, classify BMW N54/N55 as follows: STU Maximum Displacement (cc's) Minimum Weight Notes BMW N54/N55 3.0 Chart +3% (DI) Short blocks, heads, and intakes may be freely swapped within these engine designations. N54 twin turbo not allowed
B-Spec Toyota Yaris Hatchback (12-18) rear disc brakes
neutralB-Spec Toyota Yaris Hatchback and Sedan may now disconnect speed sensor.
In B-Spec Spec Lines, Toyota Yaris Hatchback (12-18) AND Toyota Yaris Sedan (07-12), add to Notes the following: "Speed sensor may be disconnected."
GT2 OEM Wing Adjustment
#37590 from Christopher Childs · Rule change · TB 25-03 (2025-03 Fastrack)
slowerTA2 and STO OEM wings no longer exempt from rear wing height rule at roof peak.
In GCR, Section APPENDIX L. 2013 TA2 TECHNICAL REGULATIONS, B.2.c., change as follows: "The entire rear wing assembly, including the end plates and any Gurney flap, shall be mounted level with, or below, the peak of the roof. OEM aerodynamic devices do not need to adhere to the height rule." In GCR, Section APPENDIX K. 2012 STO GENERAL TECHNICAL REGULATIONS, D.4.b., add the following: "Factory wings, and spoilers, and roof vortex generators are permitted, but must be removed if an approved aftermarket wing is installed. OEM aerodynamic devices do not need to adhere to the height rule."
fasterSTU Mini Cooper S SC supercharger pulley diameter reduced from 2.285 to 2.185.
In STU Spec Lines, Mini Cooper S SC, add to notes: 2100: "May run a 2.285 2.185 diameter pulley."
STU Question About a Weight Modifier
#37782 from Peter St Pierre · Rule change · TB 25-03 (2025-03 Fastrack)
fasterSTU Honda K20C1 Turbo I4 exempted from 3% DI weight adder in Spec Lines Table A.
In STU Spec Lines, Table A, Honda K20C1 Turbo I4, add to Notes the following: "The 3% DI weight adder does not need to be applied."
FF Formula F Proposal to Invite Older Cars Via a Tire Rule Change
#37802 from Anthony Stefanelli · Rule change · TB 25-03 (2025-03 Fastrack)
fasterFF allows older cars with rocker arm or outboard suspension to use bias ply slicks or VFF tires instead of radials.
In FF, GCR section 9.1.1.B.10.e, change as follows: "Formula F shall be limited to the following tires (front tires may not be used as rears): Dries: Front - Hoosier R60A Radial 43322 or F1600 Radial 43321 185/60R13 Rear - Hoosier R60A Radial 43327 or F1600 Radial 43326 205/60R13 Wets: Front - Hoosier Wet or W3 Radial 44421 185/60R13 Rear - Hoosier Wet or W3 Radial 44426 205/60R13
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Alternatively, Formula F cars with rocker arm suspension (e.g., Swift DB1, 1987-90 Reynard) and/or outboard suspension on at least one chassis end may use the following tires: Dries: Front - Hoosier H43130 R60A 20.0 x 6.0-13 or H43164 R60A 20.5 x 7.0-13 bias ply slick Rear – Hoosier H43307 R60A 22.5 x 7.2-13 bias ply slick Wets: Radial wets listed above or Front - Hoosier 44165 135/545-13 VFF Rear - Hoosier 44170 165/580-13 VFF Front tires may not be used as rears, and tires may not be mixed, i.e., radial tires may not be mixed with bias ply slick tires, bias ply slick tires may not be mixed with VFF tires, and radial tires may not be mixed with VFF tires."
STU Increase Minimum Weight
#37919 from Club Racing Board · Rule change · TB 25-03 (2025-03 Fastrack)
slowerSTU GT3U minimum weight increases 150 to 250 pounds.
In STU Spec Lines, Table C: STU-GT3U, change Minimum Weight as follows: "150 250 pounds"
fasterB-Spec Honda Fit MT intake now limited to three models with 25lb adder; Mazda2 exhaust headers allowed with up to 50lb adder; Mini Coopers FPR increased 1-2 points; Nissan Versa sedans 40lbs lighter, Yaris models 50lbs lighter.
In B-SPEC Spec Lines, change as follows: Honda Fit MT (09-14): "Any Cold Air Intake Package allowed (any manufacturer) Allow Injen Intake SP1512, K&N Intake 69- 1017TTK, or HPS intake 827-102 with a 25lb adder." Mazda2 (10-14): "Exhaust Header (cat delete) HB.EM 60-404-S-SS, HP-MZD001 allowed with a 50lb adder, or Mazda Motorsports PN 0000- 06-2410 permitted with no weight adder." Mini Cooper (R56) MT (07-10): "44 5 FPR (OE Catalyst)" Mini Cooper (R56) AT (07-10): "46 7 FPR (OE Catalyst)" Mini Cooper Clubman (R55) (07-10): "44 5 FPR (OE Catalyst)"
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Mini Cooper (R56LCI) MT (11-13): "43 4 FPR" Mini Cooper (R56LCI) AT (11-13): "45 6 FPR (OE Catalyst)" Mini Cooper Clubman (R55) (11-15): "42 4 FPR" Nissan Versa Sedan (12-19): "2490 2450" "Allow Injen intake SP1906" Nissan Versa Hatchback (12-19): "2490 2450" "Allow Injen intake SP1906" Toyota Yaris Hatchback (12-18): "2400 2350" Toyota Yaris Sedan (07-12): "2400 2350"
slowerB-Spec 07-08 Honda Fit MT minimum weight increases 50 lbs, to 2450.
In B-SPEC Spec Lines, Honda Fit MT (07-08), change as follows: Minimum weight: "2400 2450" Notes: "OEM exhaust manifold required. Primary catalyst may be removed."
B-Spec Add B14 Kit Part # to Honda Fit (07-08) Spec line
neutralHonda Fit 07-08 MT and AT approved for Bilstein B14 kit 47172401 in B-Spec.
In B-SPEC Spec Lines, Honda Fit (07-08) MT, add to Notes the following: "Bilstein B14 kit 4717 → 2401 verified compatible." In B-SPEC Spec Lines, Honda Fit (07-08) AT, add to Notes the following: "Bilstein B14 kit 4717 → 2401 verified compatible."
STU Wheel Size Inconsistency
#38018 from David Fiorelli · Rule change · TB 25-05 (2025-05 Fastrack)
neutralSTU wheel width rules clarified: cars ≤2,850 lbs max 8 inches, cars >2,850 lbs max 9 inches.
In GCR, Section 9.1.4.1.F.1., change as follows: "Wheels may not exceed 18 inches in diameter. or 8.0 inches in width for vehicles 2950 lbs. and under minimum allowed race weight. Vehicles over 2850 minimum allowed race weight may use a 9 inch wide wheel. Cars equal to or less than 2,850 lbs. minimum allowed race weight may not use wheels wider than 8 inches. Cars greater than 2,850 lbs. minimum allowed race weight may not use wheels wider than 9 inches."
FF Page 228, FF tire rule 9.1.1.10.e
#38251 from Anthony Stefanelli · Rule change · TB 25-05 (2025-05 Fastrack)
neutralFF adds rocker arm and outboard suspension cars optional bias ply and VFF tires; removes front-as-rear rule, adds mixing restrictions.
In FF, GCR section 9.1.1.B.10.e, change as follows: "Formula F shall be limited to the following tires (front tires may not be used as rears): Dries: Front - Hoosier R60A Radial 43322 or F1600 Radial 43321 185/60R13 Rear - Hoosier R60A Radial 43327 or F1600 Radial 43326 205/60R13 Wets: Front - Hoosier Wet or W3 Radial 44421 185/60R13 Rear - Hoosier Wet or W3 Radial 44426 205/60R13
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Alternatively, Formula F cars with rocker arm suspension (e.g., Swift DB1, 1987-90 Reynard) and/or outboard suspension on at least one chassis end may use the following tires: Dries: Front - Hoosier H43130 R60A 20.0 x 6.0-13 or H43164 R60A 20.5 x 7.0-13 bias ply slick or Hoosier 44165 135/545-13 VFF Rear – Hoosier H43307 R60A 22.5 x 7.2-13 bias ply slick or Hoosier 44170 165/580-13 VFF Wets: Radial wets or VFF tires listed above or Front - Hoosier 44165 135/545-13 VFF Rear - Hoosier 44170 165/580-13 VFF Front tires may not be used as rears, and tires may not be mixed, i.e., radial tires may not be mixed with bias ply slick tires, bias ply slick tires may not be mixed with VFF tires, and radial tires may not be mixed with VFF tires."
STU Table C: STU-GT3U Clarification
#38268 from Club Racing Board · Rule change · TB 25-05 (2025-05 Fastrack)
fasterSTU Spec Line GT3U minimum weight reduced from plus 250 to plus 225 pounds; wheel and tire options clarified with weight adjustments.
In STU Spec Line, Table C: STU-GT3U, change as follows: Minimum Weight: “Current GT3 race weight plus 250 225 pounds” Notes: "DOT approved tire with maximum section width of 245. GT3 cars base wheel is a maximum of 15”x9”. 18”x9” wheels allowd with a 3% weight addition. GT3 cars utilizing 15”x7” wheels are limited to a maximum section width of 225 with a 25 pound weight reduction" "All GT3U (Majors and Runoffs) cars using up to 15"x7" wheels limited to 225 section width tires shall run at current GT3 race weight plus 225lbs. All Gt3U cars shall run a DOT approved tire with a maximum section width of 245. GT3U cars are allowed optional 15"x9" wheels with a 1.5% weight addition or up to 18"x9" wheels with a 3.0% weight addition to the total weight
neutralB-Spec and C-Spec shift linkage/cables no longer prohibited from any modification; approved aftermarket bushings now permitted.
In GCR, Section 9.1.10.E.46. change as follows: "Aftermarket shift knobs are allowed and shift levers mat y be bent or extended, however the shift linkage/cables must remain stock and may not be modified in any way. Approved aftermarket shift linkage bushings are permitted."
STU 2.8-3.2L N/A Engine Allowances
#38007 from Ben Slechta · Rule change · TB 25-07 (2025-07 Fastrack)
unclearSTU 2.8-3.2L N/A engines now allow 245 max tire width; over 3150 lbs may run 275 with 2% weight penalty.
In GCR, Section 9.1.4.G.1, add the following: "A maximum section width of 245 is permitted. Cars over 3150 lbs. may run a 275 tire with a 2% weight adder."
STU 2006-2015 Mazda Miata Intake Manifold
#38422 from German Candelario Candelario · Rule change · TB 25-07 (2025-07 Fastrack)
neutralSTU Mazda MZR may use Goodwin 61-2510 or Gato Performance 31972 intake manifold.
In STU, Table A, Mazda MZR (LF, L3, L5), change Notes as follows: "May use Goodwin Part # 61-2510 or Gato Performance Part #31972 Intake manifold . "
STU Requesting Approval of the JDM Honda h23a
#38489 from Eric Fiest · Rule change · TB 25-07 (2025-07 Fastrack)
neutralSTU Honda JDM H23a added, 2259cc displacement, minimum weight per Chart, must meet ST engine regulations.
In STU, Table B, classify Honda JDM H23a as follows: STU Maximum Displacement (cc's) Minimum Weight Notes Honda JDM H23a 2259 Chart Must meet all ST engine regulations.
B-Spec Disabling 2 Pedal Shutdown
#38354 from Eric Yagel · Rule change · TB 25-08 (2025-08 Fastrack)
neutralB-Spec Honda Fit MT 09-14 two pedal shutdown may be disabled by cutting/de-pinning pin 42 BKSW at main ECU connector.
In B-Spec Spec Lines, Honda Fit MT (09-14), add to Notes the following: "Two pedal shutdown may be disabled by cutting/de-pinning pin 42 (BKSW) at the main ECU connector in the engine bay."
neutralGT2 Porsche 911 Coupe & Targa may use 993 3.8 RSR rear deck lid or approved aftermarket reproductions.
In GT2 Spec Lines, GT2 Cars-Porsche, 911 Coupe & Targa., add to Notes the following: "Porsche 911-based race cars (911,963,994), the use of the 993 3.8 RSR rear deck lid/spoiler is permitted. Aftermarket reproductions of the original Porsche Motorsports deck lid provided they faithfully replicate OEM dimensions and functionality, are acceptable for use."
B-Spec Update Honda Fit MT (07-08) Intake Allowance
slowerB-Spec Honda Fit MT 07-08 intake restricted to Injen SP1511 only, from any Cold Air Intake Package.
In B-Spec Spec Lines, Honda Fit MT (07-08), change Notes as follows: "Bilstein B14 kit 47172401 verified compatible. Allow rear sway bar Progress #62.1060. Any Cold Air Intake Package allowed (any manufacturer). Allow Injen Intake SP1511. This configuration is not currently eligible for Runoffs competition. This car must compete in three (3) separate Super Tour weekends so that performance data can be collected. In addition to SCCA data box, OBDII data collected via an AIM or similar device must be submitted. OEM exhaust manifold required. Primary catalyst may be removed."
STU STU-TCR Adjustments
#38723 from Club Racing Board · Rule change · TB 25-08 (2025-08 Fastrack)
slowerSTU-TCR tire width increases to 275 with weight adder raised from 100 to 150 pounds.
In STU Spec Lines, Table C: STU-GT3U, GT3-TCR, change as follows: Remove the current TCR spec line and add the TCR spec lines from GT3 that are being removed, adding the below to the notes. "DOT approved tire with maximum section width of 245. May run DOT approved tire with maximum section width of 275 with 100 150 pound weight adder. May not run A-compound with 275. STU-TCR spitters and side valance must comply with 9.1.4.D.3.f. STU-TCR chassis ride height must comply with 9.1.4.1.A.1."
STU Lotus Weight Reduction
#38772 from Club Racing Board · Rule change · TB 25-08 (2025-08 Fastrack)
fasterSTL/STU Lotus weight reduced: Evora GT4 to 2700 lbs, Elise Cup R to 2250 lbs, Elise/Exige SC to 2450-2550 lbs.
In 9.1.2. GT2/ST Spec Lines, Lotus Evora GT4, change Weight as follows: "2750 2700" In STU Table B: Alternate Vehicle and Engine Allowances, change Weight as follows: Lotus Elise Cup R: "2300 2250" Lotus Elise SC/ Lotus Exige SC: "2300 2550 2500 2450"
neutralB-Spec and C-Spec: asterisk removed from public road usage note in rule 9.1.10.D.9.
In GCR, Section 9.1.10.D.9, change as follows: "* If car is used on public roads, these items should be replaced, reactivated, rearmed, etc. when not in competition."
STU Lotus Weight Reduction E&O
#38919 from Club Racing Board · Rule change · TB 25-09 (2025-09 Fastrack)
fasterSTU Lotus Elise SC and Exige SC weight reduced from 2450 to 2250 lbs.
In STU Table B: Alternate Vehicle and Engine Allowances, change Weight as follows: Lotus Elise SC/ Lotus Exige SC: "2450 2250"
B-Spec Alternate Shift Cable Bushings and Rear Spring Seats
slowerB-Spec Ford Fiesta Hatchback and Sedan gain 55 lbs to 2525; restrictors increase 1 mm.
In B-Spec Spec Lines, Ford Fiesta Hatchback (11-19), change as follows: Weight (lbs): "(Effective 11/1/2025) 2470 2525" Restrictor (mm) & Type: "(Effective 11/1/2025)39 FPR 40 FPR" In B-Spec Spec Lines, Ford Fiesta Sedan (11-19), change as follows: Weight (lbs): "(Effective 11/1/2025) 2470 2525" Restrictor (mm) & Type: "(Effective 11/1/2025)38 FPR 39 FPR"
B-Spec Request to Remove Rear Shock From Spec Line Hyundai Accents/Kia
#39017 from Alex Ratcliffe · Rule change · TB 25-11 (2025-11 Fastrack)
unclearB-Spec Hyundai Accent and Kia Rio remove Bilstein B8 shock 33-187112 rear suspension approval.
In B-Spec Spec Lines, Hyundai Accent Sedan (12-17), change Notes as follows: "Bilstein B8 shock 33- 187112 approved for use in rear suspension." In B-Spec Spec Lines, Kia Rio Sedan (12-17), change Notes as follows: "Bilstein B8 shock 33- 187112 approved for use in rear suspension."
B-Spec Update Honda Fit MT (07-08) Runoffs Eligibility
fasterB-Spec Honda Fit MT (07-08) becomes Runoffs-eligible; previous three-weekend Super Tour requirement removed.
In B-Spec Spec Lines, Honda Fit MT (07-08), change Notes as follows: "Bilstein B14 kit 47172401 verified compatible. Allow rear sway bar Progress #62.1060. Allow Injen Intake SP1511 OEM exhaust manifold required. Primary catalyst may be removed. This configuration is not currently eligible for Runoffs competition. This car must compete in three (3) separate Super Tour weekends so that performance data can be collected. In addition to SCCA data box, OBDII data collected via an AIM or similar device must be submitted. (Effective 11/1/2025) Allow Torque Solution Shifter Cable Bushing kit TS-SCB-506."
STU Turbo Inlet Restrictor Table
#38961 from John Weisberg · Rule change · TB 25-12 (2025-12 Fastrack)
slowerSTU 36mm restrictor allows 2830 lbs (up 10 lbs from 2820); 37mm allows 2980 lbs (down 5 lbs from 2985).
In GCR, Section 9.1.4.H.3, change chart as follows:
A specification table follows in the original; it is not shown here.
STU 275 Tire Rule
#38983 from Peter Federlin · Rule change · TB 25-12 (2025-12 Fastrack)
slowerSTU cars over 3150 lbs lose 275-tire option with 2% weight adder.
In GCR, Section 9.1.4.G.1., change as follows: "A maximum section width of 245 is permitted. Cars over 3150 lbs. may run a 275 tire with a 2% weight adder."
STU STU Honda Engine weight penalty
#39375 from Super Touring Committee · Rule change · TB 25-12 (2025-12 Fastrack)
neutralB-Spec Chevrolet Sonic and Ford Fiesta, Honda Fit notes reorganized from individual allowances to approved parts lists; wording cleanup.
In B-Spec Spec Lines, Chevrolet Sonic Sedan MT (12-19), change Notes as follows: "GM suspension kit #23123679 permitted. Bilstein B14 kit #47-171725 verifed compatible. Allow rear sway bar ZZ Performance #ZZ-SNCRSB. Allow Aluminum Radiator #ZZP-ZZ013. Allow Babyface Fabrication brake caliper piston SNC-SS. Approved parts: ZZ Performance rear sway bar ZZ-SNCRSB, ZZ Performance radiator ZZP-ZZ013, Babyface Fabrication brake caliper piston SNC-SS. Bilstein B14 kit 47-171725 verified compatible." In B-Spec Spec Lines, Chevrolet Sonic Sedan AT (12-19), change Notes as follows: "GM suspension kit #23123679 permitted. Bilstein B14 kit #47-171725 verifed compatible. Allow rear sway bar ZZ Performance #ZZ-SNCRSB. For automatic allow Setrab 1-series Part No. FP119M221. Allow Aluminum Radiator #ZZP-ZZ013. Allow Babyface
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Fabrication brake caliper piston SNC-SS. Approved parts: ZZ Performance rear sway bar ZZ-SNCRSB, ZZ Performance radiator ZZP- ZZ013, Babyface Fabrication brake caliper piston SNC-SS, Setrab transmission cooler 50-119-7612. Bilstein B14 kit 47-171725 verified compatible. This configuration is not currently eligible for Runoffs competition. This car must compete in three separate Majors/Super Tour events so performance data can be collected. In addition to an SCCA data box, OBDII data collected via an AIM or similar device must be submitted." In B-Spec Spec Lines, Chevrolet Sonic Hatchback MT (12-19), change Notes as follows: "GM suspension kit #23123679 permitted. Bilstein B14 kit #47-171725 verifed compatible. Allow rear sway bar ZZ Performance #ZZ-SNCRSB. Allow Aluminum Radiator #ZZP-ZZ013. Allow Babyface Fabrication brake caliper piston SNC-SS. Approved parts: ZZ Performance rear sway bar ZZ-SNCRSB, ZZ Performance radiator ZZP-ZZ013, Babyface Fabrication brake caliper piston SNC- SS. World Challenge suspension kit permitted but no longer available. Bilstein B14 kit 47-171725 verified compatible." In B-Spec Spec Lines, Chevrolet Sonic Hatchback AT (12-19), change Notes as follows: "GM suspension kit #23123679 permitted. Bilstein B14 kit #47-171725 verifed compatible. Allow rear sway bar ZZ Performance #ZZ-SNCRSB. For automatic allow Setrab 1-series Part No. FP119M221. Allow Aluminum Radiator #ZZP-ZZ013. Allow Babyface Fabrication brake caliper piston SNC-SS. Approved parts: ZZ Performance rear sway bar ZZ-SNCRSB, ZZ Performance radiator ZZP- ZZ013, Babyface Fabrication brake caliper piston SNC-SS, Setrab transmission cooler 50-119-7612. Bilstein B14 kit #47-171725 verified compatible. This configuration is not currently eligible for Runoffs competition. This car must compete in three separate Majors/Super Tour events so performance data can be collected. In addition to an SCCA data box, OBDII data collected via an AIM or similar device must be submitted." In B-Spec Lines, Ford Fiesta Hatchback (11-19), change Notes as follows: "Suspension kit #M-FR3-FAEB allowed. Rear axle bushing #000-04-2203-RR allowed. Allow rear torque bar Corksport #Mz2-3- 070. Cold air intake K&N 69-3530TS is allowed. Powerflex PFR19-1511BX2 rear suspension bushing allowed. Eibach rear sway bar #35143.312 o r35143.320 is allowed. Mazda front hub D651-33-06 and rear hub D651-26-15XE allowed. Approved parts: Eibach rear sway bar 35143.312, Corksport rear torque bar MZ2-3-070, K&N intake 69-3530TS, Powerflex rear suspension bushing PFR19-1511BX2, Mazda front hub D651-33-06, Mazda rear hub D651-26-15XE." In B-Spec Spec Lines, Ford Fiesta Sedan (11-19), change Notes as follows: "Suspension kit #M-FR3-FAEB allowed. Rear axle bushing #000-04-2203-RR allowed. Allow rear torque bar Corksport #Mz2-3- 070. Cold air intake K&N 69-3530TS is allowed. Powerflex PFR19-1511BX2 rear suspension bushing allowed. Eibach rear sway bar #35143.312 o r35143.320 is allowed. Mazda front hub D651-33-06 and rear hub D651-26-15XE allowed. Approved parts: Eibach rear sway bar 35143.312, Corksport rear torque bar MZ2-3-070, K&N intake 69-3530TS, Powerflex rear suspension bushing PFR19-1511BX2, Mazda front hub D651-33-06, Mazda rear hub D651-26-15XE." In B-Spec Spec Lines, Honda Fit MT (07-08), change Notes as follows: "Bilstein B14 kit 47172401 verified compatible. Allow rear sway bar Progress #62.1060. Allow Injen Intake SP1511 OEM exhaust manifold required. Primary catalyst may be removed. Allow Torque Solution Shifter Cable Bushing kit TS-SCB-506. Approved parts: Progress rear sway bar 62.1060, Injen intake SP1511, Torque Solution shifter cable bushings TS-SCB-506. Bilstein B14 kit 47172401 verified compatible. OEM exhaust manifold required. Primary catalyst may be removed." In B-Spec Spec Lines, Honda Fit AT (07-08), change Notes as follows: "Bilstein B14 kit 47172401 verified compatible. Any aftermarket header allowed. Allow rear sway bar Progress # 62.1060. Any Cold Air Intake Package allowed (any manufacturer). Approved parts: Progress rear sway bar 62.1060, Injen intake SP1511, Setrab transmission cooler 50-119-7612, any aftermarket header. Bilstein B14 kit 47172401 verified compatible." In B-Spec Spec Lines, Honda Fit MT (09-14), change Notes as follows: "Allow damper and spring set 51600F23SA100, Damper FR LH 51605F23SA100, Damper FR RH 51606F23SA100, Damper RR 52610F23SA100, Spring adjust asy RR 52691F23SA010. Seat upper FR spring 51688F23SA200, 51402FC4YA00 front helper spring and 51403FC4YA00 front spacer permitted. Front Damper Mount P/N 51920-F23S-A30 is allowed. Allow rear sway bar Progress # 62.1061 Allow Injen Intake SP1512, K&N Intake 69-1017TTK, or HPS intake 827-102 with a 25lb adder. Allow Acuity Shifter Base Bushing Kit 1954 Two pedal shutdown may be disabled by cutting/de-pinning pin 42 (BKSW) at the main ECU connector in the engine bay. Approved parts: Progress rear sway bar #62.1061, Injen Intake SP1512, K&N Intake 69-1017TTK, or Weapon R Intake 301-166-301, Acuity shifter bushing kit 1954. World Challenge suspension kit permitted but no longer available. Two pedal shutdown may be disabled by cutting/de-pinning pin 42 (BKSW) at the main ECU connector in the engine bay." In B-Spec Spec Lines, Honda Fit AT (09-14), change Notes as follows: "Allow damper and spring set 51600F23SA100, Damper FR LH 51605F23SA100, Damper FR RH 51606F23SA100, Damper RR 52610F23SA100, Spring adjust asy RR 52691F23SA010. Seat upper FR spring 51688F23SA200, 51402FC4YA00 front helper spring and 51403FC4YA00 front spacer permitted. Front Damper Mount P/N 51920-F23S-A30 is allowed. Allow rear sway bar Progress # 62.1061. Allow Setrab 50-119-7612 transmission cooler in addition to OEM. Any aftermarket exhaust/header allowed. Any Cold Air Intake Package allowed (any manufacturer). Weapon R Intake 301-166-301. Approved parts: Progress rear sway bar 62.1061, Injen Intake SP1512, any aftermarket header, Setrab transmission cooler 50-119-7612. Two pedal shutdown may be disabled by cutting/de-pinning pin 42 (BKSW) at the main ECU connector in the engine bay." In B-Spec Spec Lines, Honda Fit MT (15-19), change Notes as follows: "Allow damper FR LH 51605F23SA81, Damper FR RH FR RH 51606F23SA81, Damper RR 52610F23SA80, Spring adjust assy RR 52691F23SA80, Camber Adjuster Comp, Damper 51920F23SA82. Allow rear sway bar Progress 62.1063. Approved parts: Progress rear sway bar 62.1063." In B-Spec Spec Lines, Honda Fit CVT (15-19), change Notes as follows: "Allow damper FR LH 51605F23SA81, Damper FR RH FR RH 51606F23SA81, Damper RR 52610F23SA80, Spring adjust assy RR 52691F23SA80, Camber Adjuster Comp, Damper 51920F23SA82. Allow rear sway bar Progress 62.1063. Allow Setrab 50-119- 7612 transmission cooler in addition to OEM. Approved parts: Progress rear sway bar 62.1063, Setrab transmission cooler 50- 119-7612. This configuration is not currently eligible for Runoffs competition. This car must compete in three separate Majors/Super Tour events so performance data can be collected. In addition to an SCCA data box, OBDII data collected via an AIM or similar device must be submitted." In B-Spec Spec Lines, Hyundai Accent Hatchback (12-17), change Notes as follows: "Allow AKSJ03-10-001 Damper Frt Assembly; AKSJ03-20-001 Damper-ASTRear; KSJ03-20-003 Rear Upper Spring Perch Delrin; AKSJ03-60-001 Sump Pan Extension. Allow rear torque bar Evilla Motorsports #KR-B1. Bilstein B8 shock 33- 187112 approved for use in rear suspension. Bilstein B14 kit #47167490 front shocks verified compatible. Allow BabyFace Fabrication sump extension #BF-HYU-PAN Vehicles equipped with rear drum brakes subtract 25 lb. Approved parts: Evilla Motorsports rear torque bar KR-B1, BabyFace Fabrication sump extension BF-HYU-PAN. Vehicles equipped with rear drum brakes subtract 25 lbs." In B-Spec Spec Lines, Hyundai Accent Sedan (12-17), change Notes as follows: "Allow AKSJ03-10-001 Damper Frt Assembly; AKSJ03-20-001 Damper-AST-Rear; KSJ03-20- 003 Rear Upper Spring Perch Delrin; AKSJ03-60-001 Sump Pan Extension. Allow rear torque bar Evilla Motorsports #KR-B1. Bilstein B8 shock 33-187112 approved for use in rear suspension. Approved parts: Evilla Motorsports rear torque bar KR-B1, BabyFace Fabrication sump extension BF-HYU- PAN. Vehicles equipped with rear drum brakes subtract 25 lbs." In B-Spec Spec Lines, Kia Rio Hatchback (12-15), change Notes as follows: "Allow AKSJ03-10-001 Damper Frt Assembly; AKSJ03-20-001 Damper-AST-Rear; KSJ03-20- 003 Rear Upper Spring Perch Delrin; AKSJ03-60-001 Sump Pan Extension. Allow rear torque bar Evilla Motorsports #KR-B1. Bilstein B14 kit #47167490 front shocks verified compatible. Allow BabyFace Fabrication sump extension #BF-HYU-PAN Bilstein B8 shock 33-187112 approved for use in rear suspension. Approved parts: Evilla Motorsports rear torque bar KR-B1, BabyFace Fabrication sump extension BF-HYU-PAN. World Challenge suspension kit permitted but no longer available." In B-Spec Spec Lines, Kia Rio Sedan (12-17), change Notes as follows: "Allow AKSJ03-10-001 Damper Frt Assembly; AKSJ03-20-001 Damper-AST-Rear; KSJ03-20- 003 Rear Upper Spring Perch Delrin; AKSJ03-60-001 Sump Pan Extension. Allow rear torque bar Evilla Motorsports #KR-B1. Bilstein B8 shock 33-187112 approved for use in rear suspension. Approved parts: Evilla Motorsports rear torque bar #KR-B1, BabyFace Fabrication sump extension BF-HYU- PAN." In B-Spec Spec Lines, Mazda2 (10-14), change Notes as follows: "Rear sway bar 0000-04-2203-RR or 0000-04-2312, Allow rear torque bar Corksport #Mz2- 3-070. Cold air intake Corksport Mz2- 6-117-31100 and air duct Mz2-6-120-10 are allowed. Exhaust Header (cat delete) HB.EM 60-404-S-SS, HP-MZD001, allowed with a 50lb adder or Mazda Motorsports PN 0000-06-2410 with no weight adder permitted. Powerflex PFR19- 1511BX2 rear suspension bushings allowed. Allow Mazda part number 0000-01-2501-CR Radiator. Allow Mazda undertray part number DO8C- 56-110A, DO8C-56-311, DO7A-56-321. Approved parts: Mazda Motorsports rear sway bar 0000-04-2203-RR, Eibach/Mazda Motorsports rear sway bar 35143.312/0000-04-2312, Corksport rear torque bar #MZ2- 3-070, Corksport intake MZ2-6-117- 31100, Corksport air duct MZ2-6-120-10, Powerflex PFR19-1511BX2 rear suspension bushings, Mazda Motorsports radiator 0000-01-2501-CR, Mazda Motorsports header 0000-06-2410, Mazda undertray/side shields DO8C-56-110A, DO8C-56-311, DO7A- 56-321." In B-Spec Spec Lines, Mini Cooper Hatchback (R50) MT (02-06), change Notes as follows: "Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches. Allow rear sway bar Progress #62.0210. Approved parts: Progress rear sway bar 62.0210, Mevotech leteral link CMK100003. Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches." In B-Spec Spec Lines, Mini Cooper Hatchback (R50) CVT (02-06), change Notes as follows: "Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches. Allow rear sway bar Progress #62.0210.CVT equipped cars allow Setrab 50-119-7612 transmission cooler in addition to OEM. Approved parts: Progress rear sway bar 62.0210, Mevotech leteral link CMK100003, Setrab transmission cooler 50-119- 7612. Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches." In B-Spec Spec Lines, Mini Cooper (R56) MT (07-10), change Notes as follows: "Allow L/F Strut-spring assembly 31 31 1 126, R/F Strut-spring assembly 31 31 1 125, Rear Shock-spring assembly 33 50 1 125. Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches. Adjustable front camber plate part number 31 30 1 507 is allowed. Allow rear sway bar Progress #62.0210. OBX header part #10- 2101-2S permitted. Approved parts: Progress rear sway bar 62.0210, OBX header 10-2101-2S. Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches. In B-Spec Spec Lines, Mini Cooper (R56) AT (07-10), change Notes as follows: "Allow L/F Strut-spring assembly 31 31 1 126, R/F Strut-spring assembly 31 31 1 125, Rear Shock-spring assembly 33 50 1 125.Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches. Adjustable front camber plate part number 31 30 1 507 is allowed. Allow rear sway bar Progress #62.0210. OBX header part #10-2101-2S permitted. Automatic equipped cars only allow Setrab 50-119-7612 transmission cooler in addition to OEM. Approved parts: Progress rear sway bar 62.0210, Setrab transmission cooler 50-119-7612. Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches. This configuration is not currently eligible for Runoffs competition. This car must compete in three separate Majors/Super Tour events so performance data can be collected. In addition to an SCCA data box, OBDII data collected via an AIM or similar device must be submitted." In B-Spec Spec Lines, Mini Cooper Clubman (R55) (07-10), change Notes as follows: "Allow L/F Strut-spring assembly 31 31 1 126, R/F Strut-spring assembly 31 31 1 125, Rear Shock-spring assembly 33 50 1 125. Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches. Adjustable front camber plate part number 31 30 1 507 is allowed. Allow rear sway bar Progress #62.0210. OBX header part #10- 2101-2S permitted. Approved parts: Progress rear sway bar 62.0210, OBX header 10-2101-2S. Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches. In B-Spec Spec Lines, Mini Cooper (R56LCI) MT (11-13), change Notes as follows: "Allow L/F Strut-spring assembly 31 31 1 126, R/F Strut-spring assembly 31 31 1 125, Rear Shock-spring assembly 33 50 1 125. Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches. Adjustable front camber plate part number 31 30 1 507 is allowed. Allow rear sway bar Progress #62.0210. Approved parts: Progress rear sway bar 62.0210. Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches." In B-Spec Spec Lines, Mini Cooper (R56LCI) AT (11-13), change Notes as follows: "Allow L/F Strut-spring assembly 31 31 1 126, R/F Strut-spring assembly 31 31 1 125, Rear Shock-spring assembly 33 50 1 125. Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches. Adjustable front camber plate part number 31 30 1 507 is allowed. Allow rear sway bar Progress #62.0210. OBX header part #10- 2101-2S permitted with 41mm FPR. Automatic equipped cars only allow Setrab 50- 119-7612 transmission cooler in addition to OEM. Approved parts: Progress rear sway bar 62.0210, Setrab transmission cooler 50-119-7612. Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches. This configuration is not currently eligible for Runoffs competition. This car must compete in three separate Majors/Super Tour events so performance data can be collected. In addition to an SCCA data box, OBDII data collected via an AIM or similar device must be submitted." In B-Spec Spec Lines, Mini Cooper Clubman (R55) (11-15), change Notes as follows: "Allow L/F Strut-spring assembly 31 31 1 126, R/F Strut-spring assembly 31 31 1 125, Rear Shock-spring assembly 33 50 1 125. Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches. Adjustable front camber plate part number 31 30 1 507 is allowed. Allow rear sway bar Progress #62.0210. Approved parts: Progress rear sway bar 62.0210. Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches." In B-Spec Spec Lines, Mini Cooper Coupe (R58) (12-15), change Notes as follows: "Allow L/F Strut-spring assembly 31 31 1 126, R/F Strut-spring assembly 31 31 1 125, Rear Shock-spring assembly 33 50 1 125. Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches. Adjustable front camber plate part number 31 30 1 507 is allowed. Allow rear sway bar Progress #62.0210. Approved parts: Progress rear sway bar 62.0210. Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches." In B-Spec Spec Lines, Nissan Versa Sedan (2012-2019), change Notes as follows: "Hardrace HR-Q0146 19mm rear sway bar permitted. Allow Injen intake SP1906. Approved parts: Hardrace rear sway bar HR- Q0146, Injen intake SP1906." In B-Spec Spec Lines, Nissan Versa Hatchback (2012-2019), change Notes as follows: "Hardrace HR-Q0146 19mm rear sway bar permitted. Allow Injen intake SP1906. Approved parts: Hardrace rear sway bar HR- Q0146, Injen intake SP1906." In B-Spec Spec Lines, Nissan Versa (2020-), change Notes as follows: "This configuration is not currently eligible for Runoffs competition. This car must compete in three (3) separate Super Tour weekends so that performance data can be collected. In addition to SCCA data box, OBDII data collected via an AIM or similar device must be submitted. This configuration is not currently eligible for Runoffs competition. This car must compete in three separate Majors/Super Tour events so performance data can be collected. In addition to an SCCA data box, OBDII data collected via an AIM or similar device must be submitted." In B-Spec Spec Lines, Toyota/Scion IA Sedan (16-20), change Notes as follows: "This configuration is not currently eligible for Runoffs competition. This car must compete in three (3) separate Super Tour weekends so that performance data can be collected. In addition to SCCA data box, OBDII data collected via an AIM or similar device must be submitted. Allow ST Suspension Kit 1327502. Approved parts: ST suspension kit 1327502. This configuration is not currently eligible for Runoffs competition. This car must compete in three separate Majors/Super Tour events so performance data can be collected. In addition to an SCCA data box, OBDII data collected via an AIM or similar device must be submitted." In B-Spec Spec Lines, Toyota Yaris Hatchback (07-11), change Notes as follows: "Speed sensor may be disconnected. Cold air intake K&N 69-8612TFK is allowed. Rear Swaybar PTR11-52071 is allowed. Approved parts: TRD rear sway bar PTR11-52071, K&N intake 69-8612TFK. Speed sensor may be disconnected." In B-Spec Spec Lines, Toyota Yaris Hatchback (12-18), change Notes as follows: "Rear Swaybar PTR11-52071 is allowed. Cold air intake K&N 69-8612TFK is allowed. Speed sensor may be disconnected. Vehicles equipped with rear disc brakes add 25 lb. Approved parts: TRD rear sway bar PTR11-52071, K&N intake 69-8612TFK. Speed sensor may be disconnected. Vehicles equipped with rear disc brakes add 25 lbs." In B-Spec Spec Lines, Toyota Yaris Sedan (07-12), change Notes as follows: "Rear Swaybar PTR11-52071 is allowed. Cold air intake K&N 69-8612TFK is allowed. Speed sensor may be disconnected. Approved parts: TRD rear sway bar PTR11-52071, K&N intake 69-8612TFK. Speed sensor may be disconnected."
Applies to Mini Cooper on this page: Trenton Kramer, Thomas Lepper
Applies to Toyota Yaris on this page: Joseph Gersch
GT2 Additional Body Options to Replace Older Stock Car Bodies
#39086 from Samuel Daniels · Rule change · TB 26-01 (2026-01 Fastrack)
neutralGT2 adds Cadillac CTS, Chevrolet Impala/Malibu/Monte Carlo/SS, Dodge Intrepid, Ford Fusion/Taurus, Lincoln MKS, Pontiac G8/GTO/Grand Prix, Toyota Camry, and Gen late Model Stock Car bodies.
In GCR, Section 4.8.4.2.1., add the following: "Cars in the class must use 1997, through current year, commercially available stock car bodywork. The following make/model bodies are allowed: 1. Cadillac CTS 2. Chevrolet Impala 3. Chevrolet Malibu 4. Chevrolet Monte Carlo 5. Chevrolet SS
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6. Dodge Intrepid 7. Ford Fusion 8. Ford Taurus 9. Lincoln MKS 10. Pontiac G8 11. Pontiac GTO 12. Pontiac Grand Prix 13. Toyota Camry Gen late Model Stock Car Bodies are allows: 1. Chevrolet Camaro 2. Ford Mustang 3. Toyota Camry"
FF Formula F Alternative Tire Rule Proposed Clarifications
#39281 from Jay Messenger · Rule change · TB 26-01 (2026-01 Fastrack)
neutralFF clarifies alternative tire eligibility for cars homologated 1989 or earlier with rocker arm or outboard suspension on all four corners.
In FF, GCR section 9.1.1.B.10.e, change as follows: "Alternatively, Formula F cars with rocker arm suspension (e.g., 1987-90 Reynard, Swift DB1,) and/or outboard suspension on at least one chassis end homologated in 1989 or earlier with any combination of rocker arm or outboard suspension on all four corners (e.g., 1987 – 1990 Reynard, Swift DB1) may use the following alternative tires. Note: This rule is intended to allow older cars with the described suspension design to use the alternative tires. It is not to be exploited by modifying cars with push-rods or pull-rods to meet the above requirements or by modifying either end of older cars to push- or pull-rod suspension to be eligible to run the alternative tires. Cars that were homologated in 1989 or earlier with push- or pull-rod suspension on no more than two corners may seek approval to run the alternative tire by utilizing the compliance process outlined in GCR section 8.1.4."
GT2 GT3 Turbo to GT2?
#39365 from Chris Edens · Rule change · TB 26-01 (2026-01 Fastrack)
neutralGT2 Mazda BP engine 1839cc classified with 46mm turbo inlet restrictor, 2250 lbs minimum weight.
In GT2 Spec Lines, Engines - MAZDA, classify Engine Family BP as follows: GT2 Engines - MAZDA Engine Family Engine Type Bore x Stroke (mm) Disp. (CC)
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Head Type Valves /
A specification table follows in the original; it is not shown here.
unclearB-Spec: Sonic restrictors removed, Fit MT +25 lbs to 2550, Fit CVT restrictor removed, Mini Coopers restrictors increased 2-4 mm, Versa sedans -25 lbs to 2425, Versa/IA restrictors removed.
In B-Spec Spec Lines, change as follows: Chevrolet Sonic Sedan AT (12-19): Restrictor (mm) & Type: "35 FPR" Chevrolet Sonic Hatchback AT (12-19): Restrictor (mm) & Type: "35 FPR" Honda Fit MT (09-14): Weight (lbs): "2525 2550" Honda Fit CVT (15-19):
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Restrictor (mm) & Type: "33 FPR" Mini Cooper Hatchback (R50) MT (02-06): Weight (lbs): "2545 2525" Mini Cooper (R56) MT (07-10): Restrictor (mm) & Type: "FPR 45 47 OE Catalyst" Mini Cooper (R56) AT (07-10): Restrictor (mm) & Type: "47 FPR (OE Catalyst) 42 FPR (Header)" Mini Cooper Clubman (R55) (07-10): Restrictor (mm) & Type: "FPR 45 47 OE Catalyst" Mini Cooper (R56LCI) MT (11-13): Restrictor (mm) & Type: "FPR 44 46" Mini Cooper (R56LCI) AT (11-13): Restrictor (mm) & Type: "46 FPR (OE Catalyst) 41 FPR (Header)" Mini Cooper Clubman (R55) (11-15): Restrictor (mm) & Type: "FPR 44 46" Nissan Versa Sedan (2012-2019): Min weight: "2450 2425" Nissan Versa Hatchback (2012-2019): Min weight: "2450 2425" Nissan Versa (2020-): Restrictor (mm) & Type: "38 FPR" Toyota/Scion IA Sedan (16-20): Restrictor (mm) & Type: "38 FPR"
STU Request for Permission on Aftermarket Turbo Kit and Intake
#39529 from John Grim · Rule change · TB 26-01 (2026-01 Fastrack)
fasterSTU Mazda MZR (LF, L3, L5) Turbo classified; Jack Spania Racing 70 mm intake manifold and Fab9 Tuning bottom-mount turbo kit approved.
In STU Spec Lines, Table A: Alternate Vehicle and Engine Allowances, Mazda MZR (LF, L3, L5), change Notes as follows: "Short blocks, heads, and intakes may be freely swapped within these engine designations. May use Goodwin Part # 61- 2510 or, Gato Performance Part #31972 or Jack Spania Racing 70 mm sheet-metal aluminum Intake manifold. Must use stock throttle body or Acura part number 16400-PND-A17." In STU Spec Lines, Table A: Alternate Vehicle and Engine Allowances, classify Mazda MZR (LF, L3, L5) Turbo as follows: STU Maximum Displacement (cc's) Minimum Weight Notes Mazda MZR (LF, L3, L5) Turbo
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Varies Chart Short blocks, heads, and intakes may be freely swapped within these engine designations. May use Jack Spania Racing 70 mm sheet-metal aluminum Intake manifold. Must use stock throttle body or Acura part number 16400-PND- A17. Fab9 Tuning bottom-mount turbo kit approved with one of the STU approved Turbos.
GT2 Tech Bulletins for GT2 and GT2-ST
#39537 from Grand Touring Committee · Rule change · TB 26-01 (2026-01 Fastrack)
slower991.2 GT3 Cup throttle body restrictor increases from 65mm to 70mm; 997.2 loses 100 lbs to 2800; Corvette LS engines get larger restrictors across multiple displacements and model years; LS3 and LT1 weight reduced 100 lbs each to 3150.
In GT2 Spec Lines, GT2 Cars – Porsche, classify 992.1 GT3 Cup as follows: GT2 Cars – Porsche Model Year Body Style Driveline Wheel Base Notes 992.1 GT3 Cup (22-25) 2 Dr RWD 4.0L flat six. 3250lbs. w/60mm Throttle Body Restrictor (TBR). Cars must be prepared in accordance with the appropriate
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model/year Porsche factory 911 GT3 Cup parts catalog/service manual. Cars may not be altered in any way except as authorized below. Drivers must have the correct year manuals as they apply to their specific car in their possession. Safety, drivers comfort, driver control and instrumentation items may be modified per the GCR. Original factory installed Matter/ IMV roll cages are allowed. The stock unmodified fuel tank is allowed. Windshield clips must be installed per GCR 9.3 Windshield Clips/Rear Window Straps. All other SCCA safety standards apply. Tires per GCR 9.3 Tires. Lubricants, consumable fluids (brake fluid, coolant etc.) and oil filters are open free. Factory (OEM manufacturer) Lexan front windows allowed as delivered. ABS is allowed. In GT2 Spec Lines, GT2 Cars – Porsche, change Notes as follows: 991.1 GT3 Cup: "3.8L flat six. 3000lbs. w/72mm Throttle Body Restrictor (TBR). Aftermarket header allowed." 991.2 GT3 Cup: "4.0L flat six. 3000lbs. w/65mm 70mm Throttle Body Restrictor (TBR)." 997.2 GT3 Cup: "3.8L flat six. 2900 2800 lbs. Aftermarket header allowed." In GT2 Spec Lines, GT2 – ST, Chevy Corvette (-2013), change as follows: 5665: Restrictor: "81 85mm flat plate" Notes: "GM LS1, LS6. LS1/LS6 C6 Corvettes using the OEM C6 intake manifold and 90 mm throttle body must use a 78mm flat plate restrictor. OEM 75mm throttle body and manifold do not require a restrictor. LS6 may reduce weight by 50 lbs. L S1/LS6 alternate intake manifold, DORMAN part # 615-900." LS2 5967 Restrictor: "83 85mm " L76 5967 Restrictor: "80 83mm flat plate" LS3 6162 Restrictor: "80 83mm flat plate" 6162 GM LS3: Weight: "3250 3150" Restrictor: "74 80mm flat plate" 6162 GM LT1: Weight: "3250 3150" Restrictor: "74 77mm flat plate" In GT2 Spec Lines, GT2 – ST, Chevy Corvette (14-19), change as follows: 5665: Restrictor: "83 85mm flat plate" Notes: "GM LS1, LS6. LS1/LS6 C6 Corvettes using the OEM C6 intake manifold and 90 mm throttle body must use a 78mm flat plate restrictor. OEM 75mm throttle body and manifold do not require a restrictor. LS6 may reduce weight by 50 lbs. L S1/LS6 alternate intake manifold, DORMAN part # 615-900." LS2 5967: Weight: "3100 3000" Restrictor: "83 85mm flat plate" L76 5967 Restrictor: "80 83mm flat plate" 6162 Restrictor: "80 83mm flat plate" 6162 LS3: Weight: "3200 3100" Restrictor: "77 80mm flat plate" 6162 LT1: Weight: "3200 3100" Restrictor: "74 80mm flat plate"
In B-Spec Spec Lines, Mazda2 (10-14), change Notes as follows: "Exhaust Header (cat delete) HB.EM 60-404-S-SS, HP-MZD001, allowed with a 50lb adder or Mazda Motorsports PN 0000-06- 2410 with no weight adder permitted.”
GT2 Allow Larger Air Cooled Engines in Porsche 911 GT2
fasterGT2 Porsche 911 SC gains option of 4.0L 4V engine at 2350 lbs or 4.0L 2V at 2275 lbs.
In GT Spec Lines, create GT Cars - PORSCHE and classify SC as follows: GT Cars - PORSCHE Model Years Body Style Drive- line Wheel- base (in) Notes SC 1978 2 Dr. Rear engine/RWD 89.45 May use alternate engine bore. 4.0L 2V @2275 lbs. 4.0L 4V @ 2350 lbs.
GT2 Classify T1 BMW in GT2
#39408 from Jared Lendrum · Rule change · TB 26-02 (2026-02 Fastrack)
neutralM3 E92 classified in GT2 with 3999cc V8, 35mm restrictor, 3300 lbs minimum weight.
In GT Spec Lines, classify M3 E92 in GT Cars - BMW as follows: GT Cars - BMW Model Years Body Style Drive- line Wheel- base (in) Notes M3 E92 (08-13) 2 Dr. RWD 108.7 Cannot be built to any other rule set.
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In GT Spec Lines, classify M3 E92 in GT Engines - BMW - BMW as follows: GT Engines - BMW Engine Family Engine Type Bore x Stroke
A specification table follows in the original; it is not shown here.
neutralC-Spec rear sway bars approved for Chevrolet Cruze, Dodge Dart, Ford Focus, Honda Civic, Mazda3i, Toyota Corolla with specified part numbers.
In C-Spec Spec Lines, change Notes as follows: Chevrolet Cruze (2010-16): "Allow BC Racing Q-06-BR suspension kit or RedShift Q-06-CSPEC. Allow Babyface Fabrication brake caliper piston SNC- SS. Approved parts: BC Racing Q-06-BR or RedShift Q-06-CSPEC suspension kit, Babyface Fabrication brake caliper piston SNC- SS, ZZ Performance ZZ-SNCRSB or Whiteline BHR93 rear sway bar. Dodge Dart (2014-16): "Allow BC Racing or RedShift Z-06-CSPEC kit. Approved parts: BC Racing Z-06-BR or RedShift Z-06-CSPEC kit, Progress rear sway bar 62.0606."
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Ford Focus Hatchback/Sedan (2011-18): "Allow BC Racing E-21-BR or RedShift E-21-CSPEC kit. Allow Corksport Axl-3-318-Black adjustable rear camber arms. Approved parts: BC Racing E-21-BR or RedShift E-21-CSPEC suspension kit, Corksport Axl-3-318-Black adjustable rear camber arms, Corksport Axl-3-071-12, Eibach 35134.312, or Whiteline BMR78XZ rear sway bar." Honda Civic Coupe/Sedan (2012-15): "Allow BC Racing A-58-BR or RedShift A-18-CSPEC kit. Approved parts: BC Racing A-58-BR or RedShift A-18-CSPEC suspension kit, Progress 62.1026 or Megan Racing MRS-HA-0791 rear sway bar." Honda Civic Coupe/Sedan (2006-11): "Allow BC Racing A-18-BR or RedShift A-58-CSPEC kit. Approved parts: BC Racing A-58-BR or RedShift A-18-CSPEC suspension kit, Progress 62.1026 or Megan Racing MRS-HA-0791 rear sway bar." Mazda3i SKYACTIV (2012-13): "Allow BC Racing N-03-BR or RedShift N-03-CSPEC kit. Allow Corksport Axl-3-318-Black adjustable rear camber arms. Approved parts: BC Racing N-03-BR or RedShift N-03-CSPEC suspension kit, Corksport Axl-3-318-Black adjustable rear camber arms, Corksport Axl-3-071-12, Eibach 35134.312, or Whiteline BMR78XZ rear sway bar." Mazda 3i MZR (2010-13): "Allow BC Racing N-03-BR or RedShift N-03-CSPEC kit. Allow Corksport Axl-3-318-Black adjustable rear camber arms. Approved parts: BC Racing N-03-BR or RedShift N-03-CSPEC suspension kit, Corksport Axl-3-318-Black adjustable rear camber arms, Corksport Axl-3-071-12, Eibach 35134.312, or Whiteline BMR78XZ rear sway bar." Mazda 3i (2004-09): "Allow Corksport Axl-3-318-Black adjustable rear camber arms. Approved parts: BC Racing N-03-BR or RedShift N-03-CSPEC suspension kit, Corksport Axl-3-318-Black adjustable rear camber arms, Corksport Axl-3-071-12, Eibach 35134.312, or Whiteline BMR78XZ rear sway bar." Toyota Corolla (2007-12): "Allow BC Racing C-02-BR or RedShift C-02-CSPEC kit. Approved parts: BC Racing C-02-BR or RedShift C-02-CSPEC suspension kit, TRD PTR11-12080 or Megan Racing MRS-TY-1710 rear sway bar." Toyota Corolla (2013-18): "Allow BC Racing C-02-BR or RedShift C-02-CSPEC kit. Approved parts: BC Racing C-02-BR or RedShift C-02-CSPEC suspension kit, TRD PTR11-12080 or Megan Racing MRS-TY-1710 rear sway bar."
What the rules allowed changed as listed; this does not say what any particular car ran.