B-Spec + GT2 + STU + SRF3 at Buttonwillow Raceway Park

2024-03-01 GT2 Classify Corvette C8 (2020- ) into GT2/ST

#33759 from Andrew Aquilante · Rule change · TB 24-03 (2024-03 Fastrack)

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

2024-03-01 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)

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

2024-03-01 GT2 Requesting classification for a 2015 Mitjet ST in GT2

#35408 from Jim Froula · Rule change · TB 24-03 (2024-03 Fastrack)

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

2024-03-01 STU Letter #35397 addendum

#35453 from Aaron Fitzsimmons · Rule change · TB 24-03 (2024-03 Fastrack)

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."

2024-03-01 STU S54 Drysump

#35464 from Macey Urso · Rule change · TB 24-03 (2024-03 Fastrack)

In STU Spec Lines, BMW S54 B32 OEM, add to Notes as follows:
"Dry Sump oiling system permitted."

2024-03-01 B-Spec 07-08 Honda Fit Rear Sway Bar part #

#35473 from B-Spec/C-Spec Committee · Rule change · TB 24-03 (2024-03 Fastrack)

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."

2024-04-01 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)

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"

2024-04-01 B-Spec Wheel Offset and Spacer Revision

#35466 from Kent Carter · Rule change · TB 24-04 (2024-04 Fastrack)

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

2024-04-01 B-Spec Set Expiration Date for Unused Spec Lines

#35742 from B-Spec/C-Spec Committee · Rule change · TB 24-04 (2024-04 Fastrack)

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

2024-05-01 GT2 Request for Spec Line 1010 Reconsideration

#35009 from Kristofer Olson · Rule change · TB 24-05 (2024-05 Fastrack)

In GT2-ST Spec Lines, Acura NSX, change as follows:
Minimum Weight: "2700 3000"
Restrictor: "43 45mm TIR"

2024-05-01 B-Spec Delete trim levels/update language for spec lines

#35746 from B-Spec/C-Spec Committee · Rule change · TB 24-05 (2024-05 Fastrack)

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)"

2024-05-01 GT2 Request to Eliminate the FPR from the Corvette (-2013) with LS2

#35878 from Michael Quattlebaum · Rule change · TB 24-05 (2024-05 Fastrack)

In GT2-ST Spec Lines, Chevrolet Corvette (14-19), change Restrictor as follows:
"78 80mm flat plate"

2024-05-01 B-Spec Wheel Rules

#36066 from B-Spec/C-Spec Committee · Rule change · TB 24-05 (2024-05 Fastrack)

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

2024-06-01 B-Spec Add B14 Kit Part # to Sonic Spec line In

#35969 from B-Spec/C-Spec Committee · Rule change · TB 24-06 (2024-06 Fastrack)

B-Spec Spec Lines, change Notes follows:
Chevrolet Sonic Sedan MT (12-19): "33mm flat plate restrictor required. GM suspension kit #2312 → 3679 permitted. Bilstein B14 kit
#47-171725 verified compatible."
Chevrolet Sonic Sedan AT (12-19): "33mm flat plate restrictor required. GM suspension kit #2312 → 3679 permitted. Bilstein B14 kit
#47-171725 verified compatible."
Chevrolet Sonic Hatchback MT (12-19): "34mm flat plate restrictor required. GM suspension kit #2312 → 3679 permitted. Bilstein
B14 kit #47-171725 verified compatible."
Chevrolet Sonic Hatchback AT (12-19): "34mm flat plate restrictor required. GM suspension kit #2312 → 3679 permitted. Bilstein

2024-06-01 B-Spec Eliminate redundant sway bar end link part #s from notes In

#35970 from B-Spec/C-Spec Committee · Rule change · TB 24-06 (2024-06 Fastrack)

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."

2024-06-01 B-Spec Update Fiat 500 Spec line In

#35990 from B-Spec/C-Spec Committee · Rule change · TB 24-06 (2024-06 Fastrack)

B-SPEC Spec Lines, Fiat 500 (12-15), change year as follows: "Fiat 500 (12-
15 7)"

2024-06-01 B-Spec Update (15-19) Honda Fit

#36067 from B-Spec/C-Spec Committee · Rule change · TB 24-06 (2024-06 Fastrack)

CVT Spec Line In B-SPEC Spec Lines, Honda Fit CVT (15-19), change as
follows:
Weight: "2525 2550"
Notes: "30 31mm"

2024-06-01 SRF3 SRF3 Alternator Pulley Update In

#36095 from Robey Clark · Rule change · TB 24-06 (2024-06 Fastrack)

SFR3, GCR section 9.1.8.D.2.H.17, change as follows:
"Alternator Pulley: P/N G902130, or P/N G902130A, or P/N G902131 (six row). 12 11 oz minimum weight."

2024-07-01 B-Spec Clean up (15-19) Honda Fit MT & CVT Notes Sections

#36068 from B-Spec/C-Spec Committee · Rule change · TB 24-07 (2024-07 Fastrack)

In B-Spec Spec Lines, Honda Fit MT (15-19), change notes as follows:
"31mm flat plate restrictor required. Allow damper FR LH 51605F23SA81, Damper FR RH FR RH 51606F23SA81,
Damper RR 52610F23SA80, Spring adjust assy RR 52691F23SA80, Bushing Comp, Damper RR TBD, Camber
Adjuster Comp, Damper 51920F23SA82, Damper wrench kit 89211F23SA80, Hose Set, FR & RR Brake
01464F23SA810, Pad Set, XR2 D948 54022F27SA81, Disk, FR Brake 45250F23SA80, Air cleaner element assy
17220FC4YA80, Exhaust pipe assy 18300F23SA81, ACG belt (6PK858) 31110FC4YA80. Allow rear sway bar
Progress 62.1063."
In B-Spec Spec Lines, Honda Fit CVT (15-19), change notes as follows:

2024-07-01 B-Spec Set expiration date for Nissan Versa (09-11)

#36069 from B-Spec/C-Spec Committee · Rule change · TB 24-07 (2024-07 Fastrack)

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.**"

2024-07-01 B-Spec Delete Redundant Rule 25

#36075 from B-Spec/C-Spec Committee · Rule change · TB 24-07 (2024-07 Fastrack)

In B-Spec, GCR Section 9.1.10.E.25., remove in its entirety and renumber.

2024-07-01 GT2 GT2-ST Rule Clarification

#36093 from Dominic Starkweather · Rule change · TB 24-07 (2024-07 Fastrack)

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."

2024-07-01 B-Spec Correct error for rear brakes of Hyundai/Kia

#36174 from B-Spec/C-Spec Committee · Rule change · TB 24-07 (2024-07 Fastrack)

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"

2024-07-01 GT2 GT4 cars may run in GT2-ST

#36235 from Grand Touring Committee · Rule change · TB 24-07 (2024-07 Fastrack)

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."

2024-08-01 B-Spec Update Tire Rules

#35984 from B-Spec/C-Spec Committee · Rule change · TB 24-08 (2024-08 Fastrack)

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.

2024-08-01 B-Spec BOP help for the automatic B-Specs

#36161 from B-Spec/C-Spec Committee · Rule change · TB 24-08 (2024-08 Fastrack)

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."

2024-08-01 B-Spec Require hood pins

#36233 from Frank Schwartz · Rule change · TB 24-08 (2024-08 Fastrack)

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."

2024-08-01 B-Spec Sonic Caliper Pistons

#36238 from Jonathan Wickert · Rule change · TB 24-08 (2024-08 Fastrack)

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."

2024-08-01 STU RWD Turbo Disadvantage

#36255 from David Fiorelli · Rule change · TB 24-08 (2024-08 Fastrack)

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"

2024-08-01 SRF3 Update Rain Tire Rule and Hoosier Decal Placement

#36436 from Robey Clark · Rule change · TB 24-08 (2024-08 Fastrack)

In SRF, GCR section 9.1.8.D.1.X.f, change as follows:
"Wet:
Front – Hoosier P/N 46100 P185/60R13 H20 or W2
Rear – Hoosier P/N 46105 P205/60R13 H20 or W2
Ground clearance is 2.5” with driver as raced when P185/60R13 (H20 or W2) tires are used.
OR
Front – Hoosier P/N 46101 P185/65R13 W2
Rear – Hoosier P/N 46105 P205/60R13 W2

2024-09-01 SRF3 Update to Letter 36619 with new Hoosier Contingency Decal Info

#36624 from Robey Clark · Rule change · TB 24-09 (2024-09 Fastrack)

In SRF, GCR section 9.1.8.D.1.X.f.3, change as follows:
"Four (4) "Hoosier" decals are required in the following locations: Two (2) 11" X 3" decals on the vertical plane of the front nose
to the outside of the cooling opening on each side and two (2) 18" X 5" decals, one on each side of the engine cover or above the
rear wheel openings on the vertical plane. Hoosier decals are available, free of charge, from all Hoosier tire distributors including
SCCA Enterprises Per Hoosier's contingency program, three (3) decals are required to qualify for contingency awards. One (1)
decal must be located on each side of the car and one (1) decal must be visible on the front."

2024-10-01 SRF3 Update SRF3 Air Filter Rule

#36681 from Robey Clark · Rule change · TB 24-10 (2024-10 Fastrack)

In SRF, GCR section 9.1.8.D.2.H.23, change as follows:
"Air Filter: P/N WM301020 or K&N RC-9160"

2024-10-01 SRF3 Update SRF Brake Rotor Thickness

#36687 from Robey Clark · Rule change · TB 24-10 (2024-10 Fastrack)

In SRF, GCR section 9.1.8.D.1.X.g, change as follows:
"Brakes: Hawk Blue 9012 pads P/N 801993 must be used. Wilwood vented rotor P/N 800065 shall must be used as delivered with
no machining of any kind. Minimum thickness 12.20mm (0.481”) 13.25mm (0.522”)."

2024-10-01 SRF3 Hoosier Tire Decal Placement

#36739 from Robey Clark · Rule change · TB 24-10 (2024-10 Fastrack)

In SRF, GCR section 9.1.8.D.2.B, change as follows:
"Mandatory identification: "SRF3" near the side car numbers. "Hoosier" logo (4) on both sides front lower outer corners of the
nose and each side of the tail. Three (3) "Hoosier" logos, one (1) on each side of the car and one (1) on the center front of the car."

2024-11-01 B-Spec Scion IA/Toyota Yaris/Mazda 2 DY chassis suspension

#35780 from Derrick Ambrose · Rule change · TB 24-09 (2024-09 Fastrack)

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."

2024-11-01 B-Spec Clean up 07-08 Honda Fit AT Notes Section

#36542 from B-Spec/C-Spec Committee · Rule change · TB 24-09 (2024-09 Fastrack)

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."

2024-11-01 STU R53 15% Pulley Request

#36980 from Aaron Fitzsimmons · Rule change · TB 24-11 (2024-11 Fastrack)

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."

2024-12-01 STU Request to Remove Miata Hubs from General category

#37138 from Christopher Childs · Rule change · TB 24-12 (2024-12 Fastrack)

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."

2024-12-01 STU BMW N54/N55 Engine Allowance

#37146 from Martin Sarukhanyan · Rule change · TB 24-12 (2024-12 Fastrack)

"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.

2025-01-01 B-Spec Remove wheelbase from spec lines and replace with Restrictor

#36074 from B-Spec/C-Spec Committee · Rule change · TB 24-11 (2024-11 Fastrack)

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"

2025-01-01 STU Audi 1.8t Wagon STU Table B

#36685 from Mike McLaughlin · Rule change · TB 25-01 (2025-01 Fastrack)

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."

2025-01-01 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.

A specification table follows in the original; it is not shown here.

2025-01-01 B-Spec Bilstein Rear Shock Request for Hyundai Accent/Kia Rio

#36965 from Alex Ratcliffe · Rule change · TB 25-01 (2025-01 Fastrack)

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."

2025-01-01 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.

2025-01-01 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"

2025-01-01 STU Merger GT3 to STU

#37486 from Club Racing Board · Rule change · TB 25-01 (2025-01 Fastrack)

In STU, Table C, change STU-GT3 charge as follows:
"(Effective January 1, 2026) TABLE C: STU-GT3U"

2025-01-01 STU GT3 TCR Tire allowance

#37494 from Club Racing Board · Rule change · TB 25-01 (2025-01 Fastrack)

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."

2025-02-01 GT2 GT2/ST - Remove Aftermarket/Racing ABS penalty

#36538 from Jorge A Nazario · Rule change · TB 25-02 (2025-02 Fastrack)

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."

2025-02-01 B-Spec Remove Redundant Language from Notes Sections

#37337 from B-Spec/C-Spec Committee · Rule change · TB 25-02 (2025-02 Fastrack)

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

Applies to Mini Cooper on this page: Trenton Kramer, Thomas Lepper

Applies to Toyota Yaris on this page: Joseph Gersch

2025-02-01 B-Spec Expire designated spec lines

#37517 from B-Spec/C-Spec Committee · Rule change · TB 25-02 (2025-02 Fastrack)

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)"

2025-02-01 B-Spec Set expiration date for Nissan Micra Cup Cars (Canadian)

#37519 from B-Spec/C-Spec Committee · Rule change · TB 25-02 (2025-02 Fastrack)

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."

2025-03-01 GT2 Hood Bulge allowed

#37000 from Gordon Leslie · Rule change · TB 25-03 (2025-03 Fastrack)

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."

2025-03-01 STU BMW N54/N55 Engine Allowance Follow Up

#37447 from Martin Sarukhanyan · Rule change · TB 25-03 (2025-03 Fastrack)

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

2025-03-01 B-Spec Toyota Yaris Hatchback (12-18) rear disc brakes

#37530 from B-Spec/C-Spec Committee · Rule change · TB 25-03 (2025-03 Fastrack)

In B-Spec Spec Lines, Toyota Yaris Hatchback (12-18), please add to Brakes (inches) as follows:
"(F) 10.0 (R) 7.9 drum or 10.2 disc"

2025-03-01 B-Spec Yaris Speed Sensor

#37536 from B-Spec/C-Spec Committee · Rule change · TB 25-03 (2025-03 Fastrack)

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."

2025-03-01 GT2 OEM Wing Adjustment

#37590 from Christopher Childs · Rule change · TB 25-03 (2025-03 Fastrack)

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."

2025-03-01 B-Spec Set Expiration Date For Fiat 500

#37689 from B-Spec/C-Spec Committee · Rule change · TB 25-03 (2025-03 Fastrack)

In B-Spec Spec Lines, Fiat 500 (12-17), please add to Notes the following language:
"This spec line will expire on 1/1/26 unless an appeal is filed."

2025-03-01 STU STU Mini Cooper pulley size clarification re: letter #36980

#37717 from Aaron Fitzsimmons · Rule change · TB 25-03 (2025-03 Fastrack)

In STU Spec Lines, Mini Cooper S SC, add to notes:
2100: "May run a 2.285 2.185 diameter pulley."

2025-03-01 STU Question About a Weight Modifier

#37782 from Peter St Pierre · Rule change · TB 25-03 (2025-03 Fastrack)

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."

2025-03-01 STU Increase Minimum Weight

#37919 from Club Racing Board · Rule change · TB 25-03 (2025-03 Fastrack)

In STU Spec Lines, Table C: STU-GT3U, change Minimum Weight as follows:
"150 250 pounds"

2025-04-01 B-Spec 2025 BOP Recommendations

#37520 from B-Spec/C-Spec Committee · Rule change · TB 25-04 (2025-04 Fastrack)

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)"

2025-04-01 B-Spec Hyundai/Toyota Factory Rear Disc Models

#37534 from B-Spec/C-Spec Committee · Rule change · TB 25-04 (2025-04 Fastrack)

In B-SPEC Spec Lines, add to Notes the following:
Hyundai Accent Hatchback (12-19): "Vehicles equipped with rear drum brakes subtract 25 lb."
Toyota Yaris Hatchback (12-18): "Vehicles equipped with rear disc brakes add 25 lb."

2025-04-01 B-Spec Request to Update the Spec line for Hyundai Accent and Kia Rio

#37880 from Alex Ratcliffe · Rule change · TB 25-04 (2025-04 Fastrack)

In B-SPEC Spec Lines, add to Notes as follows:
Hyundai Accent Hatchback (12-19): "Bilstein B14 kit #4716 → 7490 front shocks verified compatible. Allow BabyFace Fabrication
sump extension #BF-HYU-PAN."
Kia Rio Hatchback (12-19): "Bilstein B14 kit #4716 → 7490 front shocks verified compatible. Allow BabyFace Fabrication sump
extension #BF-HYU-PAN."

2025-04-01 SRF3 Driver Safety & Comfort

#37966 from Robey Clark · Rule change · TB 25-04 (2025-04 Fastrack)

In SRF, GCR section 9.1.8.D.1.D, add the following:
"f. Driver Safety and Comfort modifications to seat and controls for drivers with disabilities may be made only by approval. These
modifications must be reported to SCCA Enterprises and noted in the car logbook. The modifications are approved only for the
noted driver with disabilities. If the car is used by or sold to another driver, it must be returned to the previous standard
configuration."

2025-04-01 SRF3 Update SADEV transmission specs

#37992 from Club Racing Board · Rule change · TB 25-04 (2025-04 Fastrack)

In SRF, GCR section 9.1.8.D.2.K, change as follows:
"OR
SADEV-SRF3 6-Speed Sequential (beginning from Oct. 4, 2021 onward):
1st 12-36 3.0000 : 1
2nd 15-31 2.0667 : 1
3rd 18-28 1.5556 : 1
4th 22-28 1.2727 : 1
5th 24-26 1.0833 : 1

2025-05-01 B-Spec Correct Hyundai/Kia Model Years

#37943 from B-Spec/C-Spec Committee · Rule change · TB 25-05 (2025-05 Fastrack)

In B-Spec Spec Lines, correct model years as follows:
"Hyundai Accent Hatchback (12-19 7)"
"Kia Rio Hatchback (12-19 5)"

2025-05-01 B-Spec 07-08 Honda Fit MT Requests

#37974 from Caleb Patrie · Rule change · TB 25-05 (2025-05 Fastrack)

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."

2025-05-01 B-Spec Add B14 Kit Part # to Honda Fit (07-08) Spec line

#38010 from B-Spec/C-Spec Committee · Rule change · TB 25-05 (2025-05 Fastrack)

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."

2025-05-01 STU Wheel Size Inconsistency

#38018 from David Fiorelli · Rule change · TB 25-05 (2025-05 Fastrack)

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."

2025-05-01 STU Table C: STU-GT3U Clarification

#38268 from Club Racing Board · Rule change · TB 25-05 (2025-05 Fastrack)

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

2025-06-01 B-Spec Add Sedan spec lines for Hyundai & Kia

#37537 from B-Spec/C-Spec Committee · Rule change · TB 25-06 (2025-06 Fastrack)

In B-SPEC Spec Lines, classify Hyundai Accent Sedan (12-17) as follows:
B-SPEC Bore x
Stroke(mm)
Displacement
(cc)
Gear Ratios Final

A specification table follows in the original; it is not shown here.

2025-06-01 B-Spec Shifter Bushing Questions.

#38048 from Eric Yagel · Rule change · TB 25-06 (2025-06 Fastrack)

In B-SPEC Spec Lines, Honda Fit MT (09-14) add to Notes the following:
"Allow Acuity Shifter Base Bushing Kit 1954."

2025-06-01 B-Spec Add Weapon R Intake to Honda Fit MT (09-14) Spec Line

#38306 from B-Spec/C-Spec Committee · Rule change · TB 25-06 (2025-06 Fastrack)

In B-SPEC Spec Lines, Honda Fit AT (09-14), add to Notes the following:
"Weapon R Intake 301-166-301"

2025-06-01 B-Spec Update Rule 46

#38307 from B-Spec/C-Spec Committee · Rule change · TB 25-06 (2025-06 Fastrack)

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."

2025-07-01 STU 2.8-3.2L N/A Engine Allowances

#38007 from Ben Slechta · Rule change · TB 25-07 (2025-07 Fastrack)

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."

2025-07-01 STU 2006-2015 Mazda Miata Intake Manifold

#38422 from German Candelario Candelario · Rule change · TB 25-07 (2025-07 Fastrack)

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 . "

2025-07-01 STU Requesting Approval of the JDM Honda h23a

#38489 from Eric Fiest · Rule change · TB 25-07 (2025-07 Fastrack)

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.

2025-08-01 B-Spec Disabling 2 Pedal Shutdown

#38354 from Eric Yagel · Rule change · TB 25-08 (2025-08 Fastrack)

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."

2025-08-01 GT2 Rear Deck Lid for Older Air-Cooled Porsche

#38506 from Justin Erion · Rule change · TB 25-08 (2025-08 Fastrack)

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."

2025-08-01 B-Spec Update Honda Fit MT (07-08) Intake Allowance

#38530 from B-Spec/C-Spec Committee · Rule change · TB 25-08 (2025-08 Fastrack)

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."

2025-08-01 STU STU-TCR Adjustments

#38723 from Club Racing Board · Rule change · TB 25-08 (2025-08 Fastrack)

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."

2025-08-01 STU Lotus Weight Reduction

#38772 from Club Racing Board · Rule change · TB 25-08 (2025-08 Fastrack)

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"

2025-09-01 B-Spec Remove Asterisk from Rule 9

#38768 from B-Spec/C-Spec Committee · Rule change · TB 25-09 (2025-09 Fastrack)

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."

2025-09-01 SRF3 SRF Rule Updates

#38853 from Robey Clark · Rule change · TB 25-09 (2025-09 Fastrack)

Effective 9/1/25 in SRF, GCR section 9.1.8.D.1.V.ff, add the following:
"SRF3 Oil Cooler, P/N G480503 may be used as mounted per the GEN3 Assembly Manual. No fan permitted for SRF. HD Oil
Cooler kit P/N G1148500 may be used as mounted per the GEN3 Conversion Manual."
Effective 9/1/25 in SRF, GCR section 9.1.8.D.X.g, change as follows:
"Brakes: Hawk Blue 9012 pads P/N 801993 must be used. Wilwood vented rotor P/N 800065 must be used as delivered with no
machining of any kind. Minimum thickness 13.25mm (0.522”). The Renault Alliance solid front rotors may not be used. Rubber
caliper bushings may be replaced with bronze bushings P/N 1196185 or P/N 1196185. Original caliper pistons may be replaced
with vented caliper piston P/N 1196184; no other modification allowed. Wilwood caliper with bracket universal fit P/N 800038

2025-09-01 STU Lotus Weight Reduction E&O

#38919 from Club Racing Board · Rule change · TB 25-09 (2025-09 Fastrack)

In STU Table B: Alternate Vehicle and Engine Allowances, change Weight as follows:
Lotus Elise SC/ Lotus Exige SC: "2450 2250"

2025-10-01 SRF3 Add HD Oil Cooler

#38979 from Robey Clark · Rule change · TB 25-10 (2025-10 Fastrack)

In SRF, GCR section 9.1.8.D.1.V.ff, change as follows:
"SRF3 Oil Cooler, P/N G480503 or HD Oil Cooler P/N G1148500 may be used as mounted per the GEN3 Assembly Manual. No fan
permitted for SRF. HD Oil Cooler kit P/N G1148500 may be used as mounted per the GEN3 Conversion Manual."

2025-11-01 B-Spec Alternate Shift Cable Bushings and Rear Spring Seats

#38472 from Caleb Patrie · Rule change · TB 25-09 (2025-09 Fastrack)

In B-Spec Spec Lines, Honda Fit MT (07-08), add to Notes the following:
"(Effective 11/1/2025) Allow Torque Solution Shifter Cable Bushing kit TS-SCB-506."

2025-11-01 STU Non-Homologated Engine Swaps - Specifically K24A2 w/ Honda CRZ

#38746 from William Rori · Rule change · TB 25-09 (2025-09 Fastrack)

In STU Spec Lines, Table B: Alternate Vehicle and Engine Allowances, Honda K24, change Weight as follows:
"(Effective 11/1/2025) Chart + 2%"

2025-11-01 B-Spec Fiesta BOP Adjustment

#38847 from B-Spec/C-Spec Committee · Rule change · TB 25-09 (2025-09 Fastrack)

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"

2025-11-01 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)

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."

2025-11-01 B-Spec Update Honda Fit MT (07-08) Runoffs Eligibility

#39060 from B-Spec/C-Spec Committee · Rule change · TB 25-11 (2025-11 Fastrack)

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."

2025-12-01 STU Turbo Inlet Restrictor Table

#38961 from John Weisberg · Rule change · TB 25-12 (2025-12 Fastrack)

In GCR, Section 9.1.4.H.3, change chart as follows:

A specification table follows in the original; it is not shown here.

2025-12-01 STU 275 Tire Rule

#38983 from Peter Federlin · Rule change · TB 25-12 (2025-12 Fastrack)

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."

2025-12-01 STU STU Honda Engine weight penalty

#39375 from Super Touring Committee · Rule change · TB 25-12 (2025-12 Fastrack)

In STU Spec Lines, Table B: Alternate Vehicle and Engine Allowances, change Minimum Weight as follows:
Honda K20: "Chart + 2%"
Honda K24: "Chart + 2%"

2026-01-01 B-Spec Notes section cleanup

#39062 from B-Spec/C-Spec Committee · Rule change · TB 26-01 (2026-01 Fastrack)

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

Applies to Mini Cooper on this page: Trenton Kramer, Thomas Lepper

Applies to Toyota Yaris on this page: Joseph Gersch

2026-01-01 GT2 Additional Body Options to Replace Older Stock Car Bodies

#39086 from Samuel Daniels · Rule change · TB 26-01 (2026-01 Fastrack)

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

2026-01-01 GT2 GT3 Turbo to GT2?

#39365 from Chris Edens · Rule change · TB 26-01 (2026-01 Fastrack)

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)

A specification table follows in the original; it is not shown here.

2026-01-01 B-Spec 2026 BOP Recommendations

#39475 from B-Spec/C-Spec Committee · Rule change · TB 26-01 (2026-01 Fastrack)

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):

2026-01-01 STU Request for Permission on Aftermarket Turbo Kit and Intake

#39529 from John Grim · Rule change · TB 26-01 (2026-01 Fastrack)

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

2026-01-01 GT2 Tech Bulletins for GT2 and GT2-ST

#39537 from Grand Touring Committee · Rule change · TB 26-01 (2026-01 Fastrack)

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

2026-01-01 B-Spec Expire NLA Mazda 2 Headers

#39582 from B-Spec/C-Spec Committee · Rule change · TB 26-01 (2026-01 Fastrack)

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.”

2026-02-01 GT2 Allow Larger Air Cooled Engines in Porsche 911 GT2

#39249 from Justin Erion · Rule change · TB 26-02 (2026-02 Fastrack)

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.

2026-02-01 GT2 Classify T1 BMW in GT2

#39408 from Jared Lendrum · Rule change · TB 26-02 (2026-02 Fastrack)

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.

A specification table follows in the original; it is not shown here.

2026-02-01 B-Spec C-Spec Rear Sway Bars

#39652 from B-Spec/C-Spec Committee · Rule change · TB 26-02 (2026-02 Fastrack)

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."