This track has been raced on 4 configurations (The Circuit, 2.57 mi; 19, 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 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/T3
6
1:45.818Brad McAllister
1:45.818Brad McAllister
1:46.926Brad McAllister
137.2Scotty B White
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
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
Porsche 986 Boxster
T3
1
1:51.337Reto Eberle
128.4Reto Eberle
29.898Reto Eberle
33.530Reto Eberle
54.812Reto Eberle
Mazda Miata
SMX/STU
7
1:51.602Whitfield Gregg
1:57.853Wesley Mollno
1:58.294Christian Hoagland
116.3Whitfield Gregg
30.652Whitfield Gregg
32.263Whitfield Gregg
48.687Whitfield Gregg
Mazda Miata
SMX/STU
2
1:51.602Whitfield Gregg
1:57.885Christian Hoagland
1:58.294Christian Hoagland
116.3Whitfield Gregg
30.652Whitfield Gregg
32.263Whitfield Gregg
48.687Whitfield Gregg
Mazda Miata (2006)
SMX
2
1:57.853Wesley Mollno
1:57.853Wesley Mollno
1:59.001Wesley Mollno
112.1Wesley Mollno
32.080Wesley Mollno
34.047Wesley Mollno
51.618Wesley Mollno
Mazda Miata (2007)
SMX
2
1:58.557Jon Davies
1:58.557Jon Davies
1:59.608Jon Davies
112.1Patrick Drinkwine
32.013Jon Davies
34.268Patrick Drinkwine
51.616Jon Davies
Mazda Miata (2012)
SMX
1
1:59.056Emy Kissick
1:59.056Emy Kissick
2:00.430Emy Kissick
106.6Emy Kissick
32.502Emy Kissick
34.381Emy Kissick
52.026Emy Kissick
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
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
Nissan 370Z
T3
1
1:56.241Gamaliel Aguilar-Gamez
1:56.241Gamaliel Aguilar-Gamez
1:56.899Gamaliel Aguilar-Gamez
131.8Gamaliel Aguilar-Gamez
31.456Gamaliel Aguilar-Gamez
33.615Gamaliel Aguilar-Gamez
50.788Gamaliel Aguilar-Gamez
Mazda MX-5
SMX/STU
22
1:56.431Ethan Lampe
1:56.431Ethan Lampe
1:57.417Ethan Lampe
141.6Joey Andrews
31.777Ethan Lampe
33.620Ethan Lampe
50.974Ethan Lampe
Mazda MX-5 (2006)
SMX
8
1:56.431Ethan Lampe
1:56.431Ethan Lampe
1:57.417Ethan Lampe
141.6Joey Andrews
31.777Ethan Lampe
33.620Ethan Lampe
50.974Ethan Lampe
Mazda MX-5 (2013)
SMX
1
1:56.503Lincoln Larson
1:56.503Lincoln Larson
1:59.141Lincoln Larson
132.0Lincoln Larson
31.834Lincoln Larson
33.724Lincoln Larson
51.178Lincoln Larson
Mazda MX-5 (2012)
SMX
2
1:57.010Emy Kissick
1:57.010Emy Kissick
1:58.594Emy Kissick
133.6Emy Kissick
32.035Emy Kissick
33.863Gavin Wardle
51.449Emy Kissick
Mazda MX-5
SMX/STU
3
1:57.154Cooper Hicks
1:57.154Cooper Hicks
1:58.319Cooper Hicks
125.9Dale Shoemaker
31.969Cooper Hicks
33.832Cooper Hicks
51.214Cooper Hicks
Mazda MX-5 (2008)
SMX
3
1:57.195Christian Hoagland
1:57.195Christian Hoagland
1:58.021Christian Hoagland
136.1Christian Hoagland
31.987Christian Hoagland
33.812Aidan Shimbashi
51.037Christian Hoagland
Mazda MX-5 (2010)
SMX
2
1:58.391Bryce Johnson
1:58.391Bryce Johnson
1:59.447Bryce Johnson
134.6Bryce Johnson
32.172Thomas Bellemin
34.074Thomas Bellemin
51.811Bryce Johnson
Mazda MX-5 (2007)
SMX
1
1:59.575Andy Chittum
1:59.575Andy Chittum
2:00.160Andy Chittum
132.0Andy Chittum
32.538Andy Chittum
34.495Andy Chittum
52.307Andy Chittum
Mazda MX5 (2010)
SMX
1
2:00.055Michael Travers
2:00.568Michael Travers
2:00.055Michael Travers
115.3Michael Travers
32.815Michael Travers
34.508Michael Travers
52.561Michael Travers
Mazda MX-5 (2015)
SMX
1
2:00.330Adrian Comstock
2:00.330Adrian Comstock
2:00.678Adrian Comstock
132.0Adrian Comstock
32.913Adrian Comstock
34.721Adrian Comstock
52.548Adrian Comstock
BMW 330ci
STU/T3
2
1:56.492Sean Lovett
1:56.492Sean Lovett
1:57.049Sean Lovett
136.3Ron Tanemura
31.816Sean Lovett
33.669Sean Lovett
50.941Sean Lovett
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
BMW 330ci
T3
1
1:59.844Ron Tanemura
1:59.844Ron Tanemura
1:59.971Ron Tanemura
136.3Ron Tanemura
32.188Ron Tanemura
34.401Ron Tanemura
52.107Ron Tanemura
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
BMW Z4M
T3
1
1:59.315J. David Orem
2:00.000J. David Orem
1:59.698J. David Orem
128.1J. David Orem
32.480J. David Orem
34.645J. David Orem
51.770J. David Orem
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
wordingT3 Porsche Spec Boxster tire rule updates to current SPB rules or any 245 DOT tire.
As printed in Fastrack
In T3 Spec Lines, Porsche Spec Boxster, change Notes as follows: "Must conform to all SPB rules in the PCA rulebook. Each competitor shall have available definitive current documentation of the PCA rules. Tires must meet 2016 Current SPB rules or any 245 DOT tire permitted. No other touring allowances permitted."
Applies to Porsche 986 Boxster on this page: Reto Eberle
T3 OEM VW Steering Spindle Replacements 06-10 VW GTI and Jetta
wordingSTU Mazda BP5A classified at 1839 cc maximum displacement, 2023-04-01.
As printed in Fastrack
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.
cars added2009-2012 Porsche Cayman S classified in GT2, 3.4L, RWD, no PDK transmission allowed.
As printed in Fastrack
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
cars addedFields Cardinal V8 classified in GT1 with Ford V8 engine, 4.9L displacement, 2100 lbs minimum weight.
As printed in Fastrack
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
Show 6 more lines
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.
fasterT3 Camaro V6 1LE and LT-I4 Turbo 1LE max wheel diameter increases from 18 to 20 inches.
As printed in Fastrack
In T3 Spec Lines, Chevrolet Camaro V6 1LE (2016-), change Max. Wheel Size as follows: "18 x 10 20 x 10" In T3 Spec Lines, Chevrolet Camaro LT-I4 Turbo 1LE (2016-), change Max. Wheel Size as follows: "18 x 10 20 x 10"
wordingGT2 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.
As printed in Fastrack
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."
GT2 Remove Weight and Restrictor Penalty for Corvette C7 Body
wordingT3 Mazda RX-8 removes transmission/final drive pairing requirement; T4 removes same requirement, adds Mazdaspeed radiator and coil spring kit.
As printed in Fastrack
In T3 Spec Lines, Mazda RX-8 Base/R3/Sport/ GT (04-12), change notes as follows: "Use of 2009 R3 transmission is permitted with alternate gear ratios as listed. R3 transmission must be paired with the listed alternate final drive. Front sway bar permitted 32mm MAX rear sway bar 19 MAX, Front springs max 750, 500 rear. Cold air intake permitted. Header permitted. Aftermarket flywheel and single disc clutch permitted with no weight penalty." In T4 Spec Lines, Mazda RX-8 Base/R3/Sport/ GT (04-12), change notes as follows: "Mazdaspeed radiator #0000-01-8501 allowed. Use of 2009 R3 transmission is permitted with alternate gear ratios as listed. R3 transmission must be paired with the listed alternate final drive. Mazdaspeed coil spring kit #QSEA-34-01Z allowed. 60mm flat plate restrictor required. OE Rear spoiler allowed #F151-V4-920F. OE front air dam allowed #F151-V4-900f-BB. Springs Allowed:
Show 2 more lines
(F) Mazda Motorsports- 0000- 04-9700-08 or Eibach- 0800.250.0700 (R) Mazda Motorsports- 0000-04-9400-07 or Eibach 0700.250.0400, and helper 0000-04-9926 allowed. Alternate sway bars allowed max 32mm (f) 19mm (r)."
fasterT3 BMW 320i (14-15) gains aftermarket intercooler permission; T4 loses it.
As printed in Fastrack
In T3 Spec Lines, BMW 320i (14-15), add to Notes the following: "Aftermarket intercooler permitted." In T4 Spec Lines, BMW 320i (14-15), remove from Notes the following: "Aftermarket intercooler permitted."
wordingT3 Pontiac Solstice GXP minimum ride height set to 3 inches.
As printed in Fastrack
In T2 Spec Lines, Pontiac Solstice GXP Coupe / Convertible (07-09), add to Notes the following: "Minimum ride height is 3 inches." In T3 Spec Lines, Pontiac Solstice GXP Coupe / Convertible (07-09), add to Notes the following: "Minimum ride height is 3 inches."
fasterGT2 Mazda 20B 3 rotor loses 220 lbs, to 2280, consolidating two spec lines.
As printed in Fastrack
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."
fasterGT2-ST Dodge Viper including Comp Coupe, ACR/ACR-X with VRL front fascia loses 100 lbs.
As printed in Fastrack
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.
T3 2006-10 Volkswagen GTI - Weight Reduction request and KO4 Turbo
wordingGTL spec lines moved to contiguous position with GT2 and GT3; GTA category and spec lines renumbered and moved behind GTL.
As printed in Fastrack
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
fasterT3 Porsche Cayman (09-12) and (13-16) gear and final drive ratios adjusted; 09-12 6-SPD final drive 3.88 to 3.875, PDK 3.909 to 3.250; 13-16 6-SPD final drive 3.89 unchanged, PDK 3.91 to 3.250.
As printed in Fastrack
In T3 Spec Lines, change gear ratios and final drive ratios as follows:
A specification table follows in the original; it is not shown here.
wordingT3 VW Golf GTI and Golf R TIR location clarified to maximum 60mm from impeller.
As printed in Fastrack
In T3 Spec Lines, Volkswagen GTI (2013), change Notes as follows: "Rear sway bar max 42 mm (body and suspension mounting same as OEM), Any spring up to a maximum spring rate of 800 pounds may be used. Turbo Inlet Restrictor 36mm required max 60mm from impeller. R32 model brake package allowed. Verkline WAS-048 camber arms permitted." In T3 Spec Lines, Volkswagen Golf R (15-16) change Notes as follows: "Max spring rate 800 F&R, Max swaybar 38mm F, 42mm R. 36mm TIR required max 60mm from impeller."
slowerT3 Nissan 350Z DE motor loses 75 lbs to 3125; HR motor gains 47mm restrictors, up from 44mm.
As printed in Fastrack
In T3 Spec Lines, Nissan 350ZTrack/ Touring/Standard/Nismo(03-08), change as follows: Weight: "DE Motor: 3200 3125 HR Motor: 3275" Notes: "HR Engine: Two 44mm 47 mm flat plate restrictors required. DE engine: Cold air intake permitted."
slowerGT2-ST Dodge Viper hybrid kit restrictor reduced from 50mm to 45mm flat plates.
As printed in Fastrack
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 -
Show 1 more lines
100lbs 8400 OEM 3225 Stock OEM engine. Engine long block."
wordingT3 2010 Mustang GT 4.6 now allows 2013-14 GT style front/rear fascia, hood, and associated assemblies.
As printed in Fastrack
In T3 Spec Lines, Ford Mustang Coupe GT & Shelby GT 4.6L & Cal. Special (05-10), add to Notes the following: "2010 models may update the front and rear fascia, hood and associated assemblies to the 2013-14 GT style."
Applies to Ford Mustang on this page: Scotty B White, Roger Eagleton, Matt Lituchy, Michael Lowe, Rick Luckett
fasterT3 BMW SpecE46 minimum weight drops 50 lbs to 2850.
As printed in Fastrack
In T3 Spec Lines, BMW SpecE46, change as follows: Min Weight: "2900 2850" Notes: "Must conform to all SpecE46 rules Version 2.10. SpecE46 spec tire permitted or any DOT permitted up to 225 permitted. No other touring allowances permitted. Engines may not be modified unless specified in the Spec E46 rules and must conform to touring tech procedures. Driver must possess a current copy of the rules. Dyno results do not ensure engine compliance. SE46 HP limit does not apply."
slowerT3 Subaru STI (15-20) minimum weight increases 100 lbs to 3450; all three STI variants get larger turbo inlet restrictors.
As printed in Fastrack
In T3 Spec Lines, Subaru WRX STI (03-07), change Notes as follows: "Killer B intake pipe #EJTI and coupler permitted. 37mm 39mm TIR required." In T3 Spec Lines, Subaru STI (15-20), change as follows: Min Weight: "3350 3450" Notes: "Killer B intake pipe #EJTI and coupler permitted. 37mm 40mm TIR required." In T3 Spec Lines, Subaru Legacy GT/Spec B (05-09), change Notes as follows: "Killer B intake pipe #EJTI and coupler permitted. 37mm 39mm Turbo inlet restrictor required."
wordingSTL and STU power steering rules clarified to permit electric-assisted and hydraulic-assisted steering systems.
As printed in Fastrack
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"
T3 15-18 Golf R Alignment with Existing GTI and R Speclines
fasterGT1, GT2, GT3, GTL, GTX rear spoiler maximum surface area limit of 295.0 square inches removed.
As printed in Fastrack
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.”
In GCR, Section 9.1.9.2.D.1.g.3., change as follows: "Batteries may be replaced provided the replacement is capable of starting the car. Batteries may not be relocated unless noted on the spec line. Batteries must be adequately secured. Battery labeling must conform to 9.3.35.D. with those of an alternate manufacturer, provided they are of similar amp-hour capacity, size and within 10% of OEM weight."
T3 Open Strut Tower Brace Options for Ford Mustang V6 (11-14)
cars addedT4 now permits C-Spec cars to compete alongside B-Spec cars.
As printed in Fastrack
In GCR, Section 9.1.9.2., 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-T4 cars may race one class up in touring classes above their specification line class as long as they are a legal T2-T4 car and conform to their specification line allowances as classified. Cars conforming to C-Spec rules are permitted to compete in Touring 4."
wordingT2-T4 spec lines for 46 cars expire 12/31/24; appeal required to continue.
As printed in Fastrack
In T2-T4 Spec Lines, add **This Spec line will expire 12/31/24, Please submit to appeal** to Notes to the following Spec Lines: T2: Acura TL SHAWD (10-13) Audi S4 (12-14) Audi S5 (13-14) Audi TT RS (2018-) Cadillac ATS-V (16-17)
Show 46 more lines
Cadillac CTS-V (06-07) Chevrolet Camaro SS (98-02) Honda Civic (2017-) Saturn Sky / Convertible (07-09) Subaru Impreza WRX STi (03-07) Subaru Impreza WRX STi (08-11) T3: Audi S4 (10-11) Audi S4 (12-14) Audi TTS Coupe (10-11) Cadillac ATS (2015) Chevrolet Cobalt (05-07) Dodge SRT-4 (03-05) Ford Fiesta ST (2014-) Hyundai Genesis Coupe (2010-) Hyundai Veloster Turbo (18-21) Mazda RX-8 Base/R3/Sport/ GT (04-12) Mini Cooper S (2016-) Subaru WRX (02-05) Toyota Camry (11-15) T4: Acura Integra GS-R VTEC (3 or 4 door) (94-01) Audi A4 V-6 (96-01) / Volkswagen Passat 2.8 V6 (96-05) BMW 320i (14-15) Chevrolet Cobalt SS, Sport Coupe (06-10) Chevrolet Sonic RS (2011-) Chrysler/Dodge Neon ACR SOHC (4 door) (01-02) Dodge Dart (14-15) Dodge/Plymouth Neon ACR SOHC/DOHC (2/4 door) (95-99) Fiat 500 Abarth (12-14) Ford Focus SVT (02-04) Ford Focus ZX4 ST (05-06) Ford Focus (08-11) Ford Mustang V-6 (01-04) Honda Accord LX & EX (03-07) Honda Accord LX-S/EX/EX-L (08-12) Honda Civic Coupe Si (99-00) Honda Civic SI (02-03) Hyundai Elantra GLS (11-12) Hyundai Tiburon V-6 (03-08) Hyundai Veloster Turbo/ R-Spec (14-15) Kia Forte Koup and Sedan LX/EX (10-13) Kia Forte Koup and Sedan SX (10-13) Kia Forte Koup (14-15) Mazda Protégé ES (2000) Mazda Protégé 5 (02-03)
GT2 REDUCE C6 CORVETTE WEIGHT WITH OEM 7 LITER ENGINE REDUCE BY 150LB
fasterGT1/GT2/GT3/GTL/GTX Direct Injection now permitted if OE, using only OE pump, hoses, injectors.
As printed in Fastrack
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
fasterGT2/3 Nissan, Mazda, Mitsubishi 4G93, QR25DE/DD, QE25DE/DD Direct Injection now permitted per 9.1.2.F.7.5.E.
As printed in Fastrack
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
fasterT3 Spec Z 350Z rear wheel width increases to 10 inches; HR Engine restrictors change from 42mm to 44mm.
As printed in Fastrack
In T3 Spec Lines, Nissan 350Z Track/ Touring/ Standard/ Nismo Spec Z (03-08), change as follows: Max Wheel Size (inch): "18 x 9 (F) 18 x 10 (R)" Notes: "Nissan Motorsports: Shock Front left P/N E6110-SZ350 & Front right E6111- SZ350 & rear E6210-SZ350, springs front P/N 54010-SZ350 & rear 55020- SZ350, F&R 5600S-SZ350, Front sway bar max 37mm. Rear sway bar max 25mm, Bushings P/N (54541, 54560, 55045, 55148, 55149, 55152, 55153, 55158, 56218) - RRZ30 allowed. Nismo flywheel permitted. SPC Control Arms 72125 and 72123 are allowed. HR Engine: Two 42mm flat plate restrictors required. Zspeed and Z1 alternative clutch slave permitted. Must conform to all SpecZ 2018 Edition rules. No other touring allowances beyond 2018 SpecZ edition rules or allowances listed here. Nissan brake part numbers NISMO Race Front Caliper Kit 41001-FR350, NISMO Front Rotor-RIGHT 40206-
Show 3 more lines
SZ350, NISMO Front Rotor-LEFT 40207-SZ350 permitted. 44011-RC350 rear caliper kit permitted, 43206-SZ350 Right rotor permitted, 43207-SZ350 Left rotor permitted. Car must conform to the Official 2024 Spec Z Rules. HR Engine: Two 44mm flat plate restrictors required. Tires must conform to Spec Z rules. Competitor must be able to provide a copy of the current rules."
cars added2015 Mitjet ST added to GT2, must run per VTS specifications with complete FIA form CdM008.
As printed in 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
Show 2 more lines
complete car Specifications (FIA form CdM008) at every entered race event.
wordingSTU Mini Cooper S SC: alternate LEAP OMICRON hood scoop LEP-OMICRON3 permitted.
As printed in 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."
suspension & brakesT3 Nissan 350Z and 370Z now allow brake booster vacuum regulator, must not be in-car adjustable.
As printed in Fastrack
In T3 Spec Lines, Nissan 350Z Track/ Touring/ Standard/ Nismo (03-08), add to Notes as follows: "Brake booster vacuum regulator allowed, cannot be in-car adjustable." In T3 Spec Lines, Nissan 370Z, incl. Nismo (2009-2022), add to Notes the following: "Brake booster vacuum regulator allowed, cannot be in-car adjustable."
Applies to Nissan 370Z on this page: Gamaliel Aguilar-Gamez
fasterT3 Ford Mustang 4.6L restrictor holes increased from 40 mm to 45 mm.
As printed in Fastrack
In T3 Spec Lines, Ford Mustang Coupe GT & Shelby GT 4.6L & Cal. Special (05-10), change Notes as follows: "A flat plate restrictor with two 40 mm 45mm holes required directly behind throttle body."
Applies to Ford Mustang on this page: Scotty B White, Roger Eagleton, Matt Lituchy, Michael Lowe, Rick Luckett
T3 Appeal for Retention of T3 Mazda RX-8 Spec Line (Letter #35378)
unclearT3 and T4 Mazda RX-8 may remove or disable factory oil injection system.
As printed in Fastrack
In T3 Spec Lines, Mazda RX-8 Base/R3/Sport/ GT (04-12), add to Notes as follows: "OEM oil injection system may be removed or disabled." In T4 Spec Lines, Mazda RX-8 Base/R3/Sport/ GT (04-12), add to Notes as follows: "OEM oil injection system may be removed or disabled."
GT2 Request to Eliminate the FPR from the Corvette (-2013) with LS2
slowerT2, T3, T4 driveshafts may use alternative materials or one-piece units; non-OEM adds 25 lbs.
As printed in Fastrack
In GCR Section 9.1.9.2.D.4.b., add the following: "6. T2-T3- Driveshafts may be replaced with alternative materials ie. carbon fiber, aluminum, steel. Two-piece driveshafts may be replaced with one-piece units. If non-OEM driveshaft is used, add 25 lbs."
wordingAudi S4 00-02 in T3 must compete in 3 Super Tour events before Runoffs eligibility.
As printed in Fastrack
In T3 Spec Lines, Audi S4 (00-02), add to Notes as follows: "**This car is not eligible for the Runoffs until it has competed in 3 Super Tour events.**"
unclearFord Mustang GT 5.0L and V6 now permit Track/Performance Package parts in T2 and T3.
As printed in Fastrack
In T2 Spec Lines, Ford Mustang GT 5.0L (15-17), add to Notes as follows: "Track/Performance Package parts permitted." In T2 Spec Lines, Ford Mustang GT 5.0L (2018-), add to Notes as follows: "Track/Performance Package parts permitted." In T3 Spec Lines, Ford Mustang V6 (15-17), change Notes as follows: "Track/Performance package allowed."
Applies to Ford Mustang on this page: Scotty B White, Roger Eagleton, Matt Lituchy, Michael Lowe, Rick Luckett
fasterT2-T4 Ford Mustangs: remove 25 lbs penalty for non-OEM driveshaft, clarify alternate driveshaft allowances.
As printed in Fastrack
In GCR Section 9.1.9.2.D.4.b.6., remove as follows: "If non-OEM driveshaft is used, add 25 lbs." In T2 Spec Lines, Ford Mustang V6 (11-14), change Notes as follows: "Driveshaft from Alternate metallic driveshaft is allowed." In T2 Spec Lines, Ford Mustang Boss 302 (12-13), change Notes as follows: "Alternate metallic driveshaft is allowed." In T2 Spec Lines, Ford Mustang GT 5.0L (11-14)ki, change Notes as follows: "Alternate metallic driveshaft is allowed."
Show 12 more lines
In T2 Spec Lines, Ford Mustang GT 5.0L (15-17), change Notes as follows: "Alternate metallic driveshaft is allowed." In T2 Spec Lines, Ford Mustang GT 5.0L (2018-), change Notes as follows: "Alternate metallic driveshaft is allowed." In T2 Spec Lines, Ford Mustang Coupe GT & Shelby GT 4.6L (05-10), change Notes as follows: 'An Aluminum driveshaft is allowed." "Alternate metallic driveshaft is allowed." In T3 Spec Lines, Ford Mustang Coupe GT & Shelby GT 4.6L & Cal. Special (05-10), change Notes as follows: "An Aluminum driveshaft is allowed." "Alternate metallic driveshaft is allowed." In T3 Spec Lines, Ford Mustang V6 (11-14), change Notes as follows: "Driveshaft from Alternate metallic driveshaft is allowed."
Applies to Ford Mustang on this page: Scotty B White, Roger Eagleton, Matt Lituchy, Michael Lowe, Rick Luckett
wordingGT2-ST allows aftermarket replacement differential housings if exact equivalents.
As printed in 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."
cars addedT3 BMW Z4 3.0si expands to include 3.0i Roadster and Coupe (07-08); hardtop permitted with positive fasteners.
As printed in Fastrack
In T3 Spec Lines, BMW Z4 3.0si, & Coupe (07-08) change Model and add to Notes as follows: "BMW Z4 3.0si, 3.0i, Roadster & Coupe (07-08)" Notes: "Any OEM or aftermarket hardtop permitted that retains the OEM roof silhouette (if a hardtop is used, latches shall be replaced with positive fasteners)."
cars addedGT4 cars now permitted in GT2-ST with factory restrictor, must comply with 2012 STO rules, slicks allowed with 100-pound penalty.
As printed in 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."
fasterT3 Honda Civic Si (2017-2021) restrictor removed, weight to 2950 lbs, Runoffs eligibility requires 3 Super Tour events.
As printed in Fastrack
In T3 Spec Lines, Honda Civic Si (2017-) with 2900 weight, change as follows: Model: "Honda Civic Si (2017-2021)" Restrictor: "36mm TIR" Add to Notes: "**This car is not eligible for the Runoffs until it has competed in 3 Super Tour events.**" In T3 Spec Lines, Honda Civic Si (2017-), change as follows: Model: "Honda Civic Si (2017-2021)" Restrictor: "36mm TIR" Weight (lbs): "30752950"
Show 1 more lines
Add to Notes: "**This car is not eligible for the Runoffs until it has competed in 3 Super Tour events.**"
fasterSTU RWD turbo cars no longer required to reduce restrictor by 1 mm from table.
As printed in 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"
wordingT3 Subaru STI (15-20) and WRX STI (03-07) permitted to use OEM spec block #IAG-ENG-S550 and head studs.
As printed in Fastrack
In T3 Spec Lines, Subaru STI (15-20), add to Notes the following: "OEM spec block permitted # IAG-ENG-S550, Head studs permitted." In T3 Spec Lines, Subaru WRX STI (03-07), add to Notes the following: "OEM spec block permitted # IAG-ENG-S550, Head studs permitted."
wordingSMX Spec MX-5 camera requirement wording changed; non-functioning recorder now grounds for penalty or disqualification.
As printed in Fastrack
In GCR, Section 9.1.7.1.D.21., change as follows: "Cars running in Spec MX-5 must have a functioning video recorder/camera during all qualifying and race sessions as described in 9.3.11. Upon request by an SCCA official, competitors must provide their video recording/data, which may be used by the SCCA for any purpose including but not limited to rule enforcement and marketing. Failure to comply with a video request from an official, or having a non-functioning video recorder/camera may will be grounds for penalty or disqualification."
wordingSMX Spec MX-5 must run latest AIM Data Logger Spec MX-5 ECU Protocol; wording clarification for technical compliance.
As printed in Fastrack
In GCR, Section 9.1.7.1.D.20., add the following: “e. All cars must run the latest AIM Data Logger Spec MX-5 ECU Protocol.” These specifications are part of the SCCA GCR and all automobiles shall conform to GCR Section 9. A. PURPOSE AND INTENT Spec MX-5 (SMX) is based on four pillars: affordability, reliability, tech-ability, and fun to drive, the (SMX) Spec MX-5 car provides the membership with the opportunity to compete in similarly prepared, low cost, 2006-2015 production-based MX- 5 car with limited modifications, intended to help deliver the most fair and competitive racing competition in SCCA Road
Show 660 more lines
Racing B. CLASSIFIED CARS AND WEIGHTS 2006-2015 production-based MX-5 Cars are to be weighed with the driver and required ballast. C. AUTHORIZED MODIFICATIONS Only the left-hand drive, North American-version of the 2006-2015 Mazda MX-5 convertible & power retractable hardtop (PRHT) are eligible. The original OE vehicle identification number (VIN) stamped on the firewall must correspond with the model year automobile as classified. VIN plates or stampings must remain in place, with the firewall VIN taking precedence. A Mazda Factory Shop Manual for the specific make, model, and year of automobile is required to be in the possession of each entrant. The manual may be in the form of printed material, microfiche, CDs, DVDs, and/ or Internet access to manufacturer sponsored web-based databases that is readily accessible at time of inspection. The manual is intended to aid scrutineers in identifying parts and the configuration of the automobile. The items outlined in this VTS document represent the only modifications and safety items permitted and/or required on Spec MX-5 vehicles other than safety items as required in SCCA’s current GCR Section 9. Parts and components may not perform an unauthorized function (i.e. Modifications must be stated as authorized or cannot be done). If the Mazda Factory Manual or these rules provide only a partial specification or no specification at all, the Mazda parts may not be modified beyond what is permitted in these rules. Compliance will be determined by comparison to new or like parts and/or the parts compliance measurement listing delivered by Mazda. Other approved parts with only a partial specification or no specification available in these rules may not be modified. Assembly, rebuild, and refurbishment procedures, and all associated dimensions must adhere to the published factory service procedures, except as otherwise stated in these rules. No components may be added or omitted from those specified by the published factory service procedures. All components must be comply with stated standard dimensions. It is permitted to use industry standard procedures to repair damaged components. The use of any painting, coating, plating, metal treatment process or impregnating substance (e.g., anti- friction, thermal barrier, oil shedding coatings, chrome, anodizing, REM, isotropic finishing, etc.) to any internal engine surface, internal axle components, internal transmission or differential surface, internal or external surfaces of the intake manifold, exhaust manifold or down tube, is prohibited. D. VEHICLE TECHNICAL SPECIFICATIONS (VTS) 1. Vehicle Weight a. The minimum vehicle weight with driver is 2,525.0 lb. 2. Ballast If ballast is required to meet the required minimum weight, it must be added as follows: a. A ballast base plate must be securely mounted using the factory OE passenger seat mounting bolt holes and bolts. Any number of additional segments of ballast may be attached to the base plate. b. Each segment of ballast must be fastened to the base plate with a minimum of two (2) one-half (1/2) inch bolts/studs and positive lock nuts of SAE Grade 5/ Metric 8.8 or better and must utilize large diameter, load distributing washers. In lieu of positive lock nuts it is permitted to positively thread the additional segments of weight into the base plate. c. Holes are not permitted to be drilled in the floor pan to mount ballast. 3. Chassis a. Towing eyes per SCCA’s current GCR Section 9.3 are required. There must be an arrow that strongly contrasts with the vehicle paint scheme pointing to each tow eyestrap. 9.1.7.1 SPEC MX-5 (SMX) b. All cars must use the front subframe PT# - NE51-34-800C c. All cars must use the rear subframe PT# - NE51-28-800B. d. OE strut tower brace is required; it is comprised of three (3) components; see Table 1 for part numbers. e. An engine to fender brace located on the passenger side of the engine bay may be used if mounted in such a way that it does not foul brake lines, fuel lines, or other systems that would interfere with the safe operation of the vehicle under race conditions – see Table 1 for allowed modifications. (Mazda Motorsports PT# 0000-07-5600) f. Disabling or removing of the door locking mechanism must be performed. g. To facilitate frequent lifting of the vehicle, a 3/4” boxed tube not to exceed 12” long may be added under the rocker panel inboard of the factory pinch weld flange on each side of the vehicle. h. Convertible tops/power retractable hard tops (PRHT) and attaching hardware must be completely removed. i. All chassis, structural, and electrical repairs, if performed, must be in conformity with factory procedures, specifications, and dimensions. Unless specifically authorized by the manufacturer for repair or permitted by these rules, no reinforcement (e.g., seam welding, material addition, etc.) is permitted. j. Removal of excess wiring is permitted provided it serves no other purpose and does not splice or interrupt the OE harnesses. Removal of the following systems is permitted: audio equip- ment; power seats; airbag/supplemental restraint systems components; heated seats; interior lighting; power windows; and power door locks. (No additional wiring may be added except as permitted in other sections - e.g., Section 16: Electrical Equipment.) Table 1: Strut Tower Brace Parts Description Mazda Part # Right Side of Strut Tower Brace NE57-56-48X Left Side of Strut Tower Brace NE57-56-49X Center Section of Strut Tower Brace NE57-56-48ZA k. A hole is permitted to be drilled in part #’s NE57-56-48X and NE57-56-49X to allow for access to the shock adjuster screw is permitted (it is recommended that the hole not be larger than 15mm); NE57-56-48X may be modified in order to allow room for the engine passenger side engine brace; no other modifications or other braces are permitted. l. MX-5 donor chassis with originally equipped with 16” OE wheels require installation of OE strut tower brace (part # NE57-56-35XA). m. To facilitate engine bay air flow for cooling purposes it is permitted to remove the section outlined below in red from OE PT# NE57-56- 35XA. Block-off plates must be installed at the fresh air vent for the HVAC module at the firewall under the cowl to isolate driver compart- ment from engine compartment. (FIREWALL BLOCKOFF PLATE 0000-07-5832) No additional modifications are permitted. 4. Body a. Interior and exterior door handles are required to remain operable. Alternate interior door handles or cord/strap are permitted. b. The driver’s and passenger’s side inner door structural panel may be removed to fit the cage. c. The stock side impact/anti-intrusion beam must not be modified or removed. d. Door locking mechanisms must be disabled or removed. e. A minimum of two (2) of the brake lights must be in working order per the current GCR Section 9.1. f. The two (2) OE unmodified, external mirrors for the correct the Mazda MX-5 (left and right) are required; they must be mounted in stock location and may not be modified. g. OE interior rearview mirror or an aftermarket rearview mirror must be used. h. 2006-2015 MX-5 bodywork may be updated or backdated, OE body parts only. (This includes Mazda OE accessory body parts such as trunk lid spoiler, side skirts, front air dam.) i. Mazda Motorsports’ fiberglass headlamp replacements may be used; (See table 2) no modifications or substitutions are permitted; exceptions: painting, covering, and wrapping. Table 2: Headlamp Replacement Covers Model Year Mazda Part # Description 2006-2008 0000-07-5818-LT Left Side 2006-2008 0000-07-5818-RT Right Side 2009-2015 0000-07-5819-LT Left Side 2009-2015 0000-07-5819-RT Right Side j. Lexan windshield may be used in place of the stock windshield. (Mazda Motorsports PT# - 0000-07-5101-5S) k. Windshield clips per current GCR Section 9.3 windshield clips are recommended. l. Hood and trunk pins or clips are permitted. Factory hood and trunk latches must remain intact and operational and may not be removed, disabled or altered. m. Front under hood weather strip must remain intact PT#- NE51-56-750 n. Rear under hood weather strip must remain intact PT#- NE51-56-760 o. Modification of release cables is permitted to facilitate external pull/opening straps/pulls/cords. p. A radiator screen of 0.125” minimum stainless-steel mesh may be added in front of the radiator. 1. The screen must be a single layer and must be installed to the bumper cover and or grill and be contained entirely within the bodywork of the vehicle. 2. Tape may be applied to the mesh screen. 3. The OE grill must remain intact. q. It is allowed to apply roll bar padding to the crash support bar (52-070) located behind the front bumper to prevent damage to the bumper. r. Front and rear fender lips may be rolled to prevent tire damage. s. Front OE fender liners must be intact and unmodified, except for what is allowed in section 13. J regarding brake ducts. Repairs due to on-track damage is allowed so long as it serves no other purpose. t. OE fog lights lens/glass must be removed. This will allow for the installation of brake duct kit (Mazda Motorsports’ part # 0000-03- 5301-NC.) The remaining opening from the fog light lens must either be blocked, or a connection must be made from the fog lamp opening/hole in the bumper fascia to a brake duct attached to the hub. u. Side marker lenses may be removed, and holes may be covered. v. OE hard top or the unmodified Mazda Motorsports hard top (part # 0000-07-5901-CC) are permitted. w. PRHT chassis cars must trim the finish panel with the 3rd brake light to fit one of the approved hard tops. 1. Hhardtops may be painted or wrapped. 2. OE hard top latches must be removed and replaced with positive fasteners. 3. The front of the hard top may attach to the upper windshield bar of the roll cage. 4. It is permitted to run one single piece of racer tape to cover the leading edge of the after- market hard top where it meets the factory windshield frame. 5. Openings beneath the hard top seal to the body are not permitted. The hard top must be securely mounted to the body of the vehicle and perform no other purpose. 6. Body repair must be performed to maintain stock body contours, lips, profiles, etc. body repair modification must not increase clearance. x. To improve driver’s exit through the window area, the driver and passenger vent window and vent window supporting frame may be removed as an assembly. 1. Vent windows may be modified to accept fresh air ducting. y. OE radio antennas may be removed. Antennas for two-way radios may be added. z. Insulation & undercoating may be removed. aa. All cars must run with both the front door windows fully open (i.e. fully down). 5. Cockpit / Trunk a. All interior trim components such as carpets, seats, cargo bins, seat belts, floor mat, firewall insu- lation/blanket, sound deadener patches, undercoating, radio systems, speakers, dome lights, grab handles, sun visors and their insulating and attaching materials, must be removed. Other than to provide for the installation of required safety equipment or other authorized modifications, no other driver/passenger compartment alterations or gutting are permitted. b. It is permitted to install a radio replacement panel. c. The outer edges of the dashboard may be cut the minimum amount required to install the roll cage. d. Air bag systems must be disarmed and must be removed. e. It is permitted to remove all components of the cruise control system. f. The top portion of the door panels containing the door latch release handle must remain intact. g. The lower portion of the door panels must be removed for installation of the roll cage. Gutting of the door may not go outside of the factory seal. h. The door window glass and window operating mechanisms must be removed. i. The OE dashboard and its attaching hardware and brackets must be retained. j. For installation of required safety equipment, however, it is permitted to modify the OE dash bar, so long as it is outboard of the first dash support brackets (illustration below). Modification of the first dash support brackets, nor inboard from them, is not permitted. The OE dash bar must be securely mounted. k. The HVAC control module located under the dash may be removed together with the following: blower motor, evaporator core, heater core and associated ducting. Once removed it is permitted to block the blower inlet passage on the firewall. l. All openings between the driver/passenger compartment and the trunk / gas tank area that include the filler tube & fuel tank vent must be filled completely with a metal bulkhead that is securely mounted (E.G. nuts/bolts, nut-serts, rivets). This shall close the entire trunk from the driver/ passenger compartment and comply with current GCR Section 9.3. m. Mazda Motorsports’ finish panel trim kit (part # 0000-07-5822) may be used to create the required bulkhead above n. It is permitted to remove the driver’s side factory seat mounts, but not the floor pan. o. It is permitted to remove the horn and all associated horn related components. p. OE driver’s seat must be replaced with a one-piece bucket-type race seat per current GCR Section 9.3. q. The passenger seat must be removed. r. Any steering wheel except wood rimmed types may be used. s. Any shift knob may be used. t. The air conditioning equipment located in the engine compartment (AC compressor assembly, associated lines/dryer and the condenser) must be removed. u. Alternate gauges and instruments may be added. The original instrument cluster must remain connected and functional However, it may be relocated to allow the mounting of an aftermarket dash such as an AiM. The wiring to relocate the dash may not be cut or extended, it may only be re-routed. The remainder of the dashboard or panel must remain intact. v. Modifications may be made to the foot pedals to improve the comfort and accessibility to the driver; relocation of mounting points is not permitted. 1. Dead pedal/footrest and heel stop may be added. w. Instrument clusters must be unmodified OE parts . x. Two-way radios may be used. y. Alternate means of windshield defrosting is permitted 6. Engine Modifications 6.1. General a. No modifications to the engine are permitted, except where specifically authorized within these rules. This includes but is not limited to: all fuel injection and engine management components, as well as electrical, cooling, and lubrication systems. b. All systems, unless otherwise stated, are subject to test procedures and must conform to OE specifications as stated in the Mazda Factory Service Manual. c. Permitted engine maintenance includes the replacement, but not modification, of external engine and engine systems parts. 1. No balancing, blue printing, lightening, polishing or other modification of moving parts of the engine is permitted. 2. All parts in the engine must be OE parts unless specified in this rule set. 3. For all Mazda part numbers in these specifications, superseding part numbers are consid- ered equivalent. d. Compression ratio for 2.0L engines must be 11.00:1; calculated using the official Spec MX-5 calculator. 6.2. Engine Block a. The engine block may be decked or milled to achieve the class specified compression ratio. Honing of cylinders is permitted to accommodate piston clearance so long as a maximum standard diameter is not exceeded shown in Table 3. b. The cylinders may be bored to accommodate piston clearance requirements so long as maximum permitted overbore diameter is not exceeded shown in Table 3 below. Table 3: Piston Sizes Piston Part # Bore Diameter Max Standard 0000-01-5310 87.6046mm (3.449”) Allowed Overbore (.020) 0000-01-5310-OS 88.1126mm (3.469”) c. It is not permitted to overbore a single cylinder; all cylinders must be bored equally. d. Sleeving of cylinders is not permitted. 6.3. Crankshaft a. OE Mazda MZR 2.0L (2009-2015) manual transmission crankshaft (part # LF9G-11-301) must be used with no modifications except for machining or polishing polishing and/or machining of the bearing surfaces to allow the use of main and rod bearings as permitted in Table 4 below. Table 4: Crankshaft Measurements easurement iameter Diameter b. OE crankshaft (Mazda part # LF9G-11-301) must weigh a minimum of 31.75lb. c. Maximum permitted stroke is as follows: 3.27” / 83.1mm d. Shot peening is prohibited. e. Bearings 1. Main and rod bearings must not be modified; coatings are not permitted. 2. OE bearings are permitted. 3. The only bearing sizes permitted other than OE are listed in see Table 5. Sizes Bearing Type Minimum Bearing Width Minimum Bearing Thickness Minimum Bearing Weight Part # Main Bearings (Standard H) .630” 0.097” N/A 0000-01-5215-MB Main Bearing (Standard HX) .630” 0.097” N/A 0000-01-5216-MB Rod Bearings (Standard H) .630” 0.057” 28g 0000-01-5213-RB Rod Bearing (Standard HX) .630” 0.057” 28g 0000-01-5214-RB f. The crank trigger must not be modified; it must be installed per the Mazda Factory Service Manual. g. OE crank pulley/balancer (Mazda part # LF94-11-400) must not be modified and must be installed per the Mazda Factory Service Manual. h. Knife edging of the crankshaft is not permitted. i. Modifications to the crankshaft counterweights are not permitted. j. Coatings, REM or metal treatments of any kind are not permitted. k. Alternate shifter bushing located at the bottom of the shift lever is allowed. 6.4. Connecting Rods a. OE Mazda MX-5 (2009-2015) manual transmission unmodified connecting rods (part # LF9G- 11-210) must be used. Connecting rod weight with cap and bolts must not be less than 530 grams. 6.5. Pistons a. Mazda Motorsports’ competition pistons (standard bore part # 0000-01-5310; oversized part # 0000-01-5310 OS) are required; no modification is permitted. b. The minimum weight of the piston, less wrist pin and hardware, must not be lighter than 290 grams. c. Mazda Motorsports’ competition wrist pin (part # 0000-01-5310-PN) must be used. d. The minimum weight of the wrist pin must not be lighter than 80 grams. e. Modification of the piston ring end gap width is permitted. 6.6. Cylinder Head a. Mazda Motorsports’ competition cylinder head (part # 0000-01-5300) must be used; no modi- fications to the cylinder head are permitted outside of the gasket face surface outlined below in Table 6. b. Intake runner CC volume is 182cc +/- 1cc. c. Exhaust runner CC volume is 114cc +/- 1cc. d. Combustion chamber volume may not be below 41cc. e. The gasket face of the cylinder head may be resurfaced provided the maximum allowed compression ratio is not exceeded. I. Surfacing of the head gasket surfaced must be in a flat plane. II. Cylinder head gasket surface distortion may not exceed .010mm or 0.004”. f. The minimum height of the cylinder head as measured must be at least (TBA) g. The following head gaskets in Table 6 below are permitted; no other gaskets may be used. Table 6: Head Gasket Measurements Description Thickness Mazda Part # OE Gasket 0.017” approximate crush depth L3G2-10-271A Competition Gasket 0.55mm (0.021”) 0000-01-5319-21 Competition Gasket 0.75mm (0.030”) 0000-01-5319-30 Competition Gasket 1.0mm (0.040”) 0000-01-5319-40 Competition Gasket 1.3mm (0.051”) 0000-01-5319-51 6.7. Camshaft and Camshaft Timing a. Camshafts must not be modified; see Table 7 for OE camshaft part numbers. Table 7: Camshaft part numbers Description Mazda Part # Intake Cam L3E3-12-420 Exhaust Cam L309-12-441B b. Camshaft and crankshaft sprockets must not be modified; see Table 8 for part numbers. shaft Sprocket Part #s t # 4X0C 425 c. Cam timing must not be altered; chain must be installed as stated in the Mazda Factory Service Manual. d. OE timing chain (Mazda part # LF7A-12-201) is required; no modification is permitted. e. OE timing chain components must be used; see Table 9 for Mazda part numbers. Table 9: Timing Chain Guide Part #s Description Mazda Part # Fixed Guide LF01-12-614 Tensioner Guide LF01-12-671 6.8. Valves a. OE valves must not be modified (including reshaping); see Table 10 for Mazda part numbers. le 10: Valve Part #s b. Valve location or angle must not be moved. c. Valve guides may not be replaced. d. Valve job measurements must be as follows: 1. Intake 35 top 45 seat 65 bottom 77 bottom seating angle width is 1.0mm 2. Exhaust 40 top 45 seating to radius seating angle width 1.2 mm. 3. Valve stem installed height must be per the Mazda Factory Service Manual. 4. Valve stem seals must be OE. 6.9. Valve Springs a. Mazda Motorsports’ competition valve springs (part # 0000-01-5319-SP) are required. 6.10. Intake Manifold a. OE intake manifold (Mazda part # LF9G-13-130B) is required; no modification is permitted (e.g., no material may be added or removed; no painting or coating on the exterior or interior permitted). b. All air entering the engine must pass through the throttle body and metered by the mass airflow sensor. c. Removal of these factory EGR components is permitted: Valve, crossover pipe, coolant lines (EGR DELETE KIT 0000-06-5447) d. If factory EGR components are removed, the following ports must be blocked: 1. Intake manifold cross over pipe port. 2. Cylinder head cross over pipe port. 3. EGR valve port on back of cylinder head. 6.11. Intake System a. Cars must replace OE air box with the Mazda competition cold air intake kit (part # 0000-06- 5150-KT); no modification (e.g., ducting or baffling of air, venturi cones) to the cold air intake kit is permitted. b. No alteration to the intake tube length, diameter, or shape is permitted. c. The air filter supplied in the Mazda Motorsports competition cold air intake kit may be refreshed with the Mazda Motorsports’ competition air filter (part # 0000-06-5204). 6.12. Fuel System a. Fuel must comply with SCCA GCR section 9.3.25 b. OE fuel pump (Mazda part # LFG1-13-350) is required; no modification is permitted. c. It is permitted to remove the unleaded fuel restrictor from the filler neck. (GCR 9.3.26) d. Mazda Motorsports’ competition fuel rail that includes fuel pressure gauge, and fuel sampling test port and hose kit (part # 0000-06-5207) is optional. 1. Fuel pressure sensor integrated into the required AIM data acquisition system is required. It must be operational and able to be viewed when pulling a competitor on track data. 2. The addition of a switch or jumper located in the under-hood fuse box is allowed to acti- vate the fuel pump. This modification may serve no other purpose. 3. One operational fuel sample test port is required. Fuel sample test ports shall be made from dry break fuel rated quick disconnects. No other style of fuel sample test port is allowed (e.g., Schrader valves). 4. No other modifications permitted. e. OE fuel pressure regulator (Mazda part # LFB6-13-280) is required. 1. Vehicle must run between 54 and 63 PSI of fuel pressure. f. OE injectors (Mazda part # L3G5-13-250) are required; no modification is permitted. 1. Flow rates for the injectors must fall within the factory tolerance of 204-216ml (204-216 cc, 12.5-13.1 cu in/minute). 6.13. Lubrication System a. OE engine oil filter is required; no substitutions permitted. b. OE oil pump PT# L310-14-100J is required and no modifications are permitted. c. Mazda Motorsports’ competition oil cooler adaptor kit with lines (part # 0000-01-5100KT) is required; no modification is permitted. d. Oil pressure sensor integrated into the required AIM data acquisition system is required. It must be operational and able to be viewed when pulling a competitor on track data. e. Oil and lubricants are unrestricted. 6.14. Engine Control Unit (ECU) a. Reference penalties for non-compliance of the Spec ECU flash in Section 21 below. Modifica- tion or attempted modification of the Spec ECU flash will result in a 12-month suspension from competition and $1,000.00 fine. b. Mazda Motorsports’ competition ECU (part # 0000-01-5379) is required; serial number must be visible; external or internal modification is not permitted. c. ECU calibrations and inputs must not be modified. d. OE engine electrical harness (part # NH18-67-020A) is required; no modification is permitted. e. OBDII diagnostics port must be operational in all cars. 1. The check engine light must be operational and perform the function test at start up. 2. The OBDII port must be available at all times (including during the race) for tech officials to install test equipment as necessary. 3. If a competitor uses the OBDII port to power any type of data acquisition system, he/she would be responsible for providing the splitter cable to plug in both units or unplug the data acquisition system. f. Instrument panel clusters must be operational and unmodified OE parts. g. Temporary data acquisition devices may be installed by the sanctioning body for technical compliance. h. Removal of Mazda ECU insulator PT# LFG1-13-3C1 is permitted (diagram below) 6.15. Miscellaneous a. The factory air conditioning system and all associated lines, compressor, condenser and evap- orator must be removed. 1. Once the AC compressor is removed, the OE AC pulley delete kit (Mazda part # LF17-15- 940E) is required. b. Serpentine belt Gates PT# 6PK-2170 or same size equivalent is required. 7. Exhaust a. OE exhaust manifold and OE heat shield must be replaced with Mazda Motorsports’ competi- tion part # 0000-06-5407-NC; no modification is permitted (e.g., internal or external wraps, coatings, paints, metal treatments, thermal barriers etc.). b. OE exhaust system must be replaced with Mazda Motorsports’ competition part # 0000-06- 5427-NC; no modification is permitted (e.g., internal or external wraps, coatings, paints, metal surface treatment, thermal barriers etc.). c. The forward oxygen (O2) sensor (OE Lambda Sensor) must remain in the factory location and in full working order. Mazda Motorsports’ competition O2 sensor installation kit wiring extender (part # 0000-10-5320) is permitted. d. The secondary post catalytic oxygen (O2) sensor must be removed. e. Heat shielding 1. OE heat shield protecting ABS unit from header may not be removed or modified. 2. OE muffler heat shield may not be removed or modified. 3. It is permitted to wrap the exhaust pipe from the mid connection flange to the muffler. (see red arrows in picture below) 4. Use of heat shielding material on transmission tunnel to replace OE heat shielding is permitted. OE heat shielding must be removed from transmission tunnel. (see diagram below) 8. Cooling System (cooling system checklist) a. Mazda Motorsports’ competition radiator and oil cooler assembly (part # 0000-01-5504-CR) is required (e.g., OE is not permitted). b. The radiator using the OE mounting brackets must be installed in its original location. c. The oil cooler may not be moved or altered from the pre-assembled mounting location. d. Radiator ducting may be placed on each side of the radiator tanks and the undertray to force air through the radiator fins. The gap between the top and sides of the radiator may be sealed but shall not perform any other function. e. The unmodified OE cooling fan must be maintained in full working order and mounted in the stock location. Axillary control of the radiator cooling fan may be added to activate the fan independent of the ECU, OE control of the fan must remain intact. f. Thermostats may be modified, removed or replaced. g. The OE water pump (Mazda part # 1F70-15-100) is required; no modification is permitted. h. The OE water pump pulley (Mazda part # L327-15-131) is required; no modification is permitted. i. Engine cooling system hoses and clamps may be substituted. j. The heater core may be removed along with HVAC evaporator core including all associated hard pipes and hoses. This is to include OE water to oil cooler lines as well as throttle body coolant lines. (Rear coolant pipe 0000-01-5514, bottom coolant pipe 0000- 01-5515) k. The OE engine coolant expansion tank may be replaced with any aftermarket part but and must not serve another purpose. 9. Clutch, Pressure Plate and Flywheel a. Vehicle may use any combination of the options listed in Table 11 below. Table 11: Clutch Component Part Numbers Description Mazda Part # Mazda Factory Clutch Disc LF05-16-460A ACT Sprung Clutch Disc 0000-02-5420-AC ACT Pressure Plate 0000-02-5405-AC ACT Clutch and PP Kit 0000-02-5004-G6 Mazda Factory Pressure Plate LF04-16-410A b. The unmodified pressure plate must be bolted directly to the stock, unmodified flywheel. c. OE flywheel (Mazda part # LF9G-11-500) is required. Factory Service Manual resurfacing specification is permitted; no other modification is permitted. d. Alternate clutch lines are permitted but must not serve another purpose. e. Clutch components must adhere to the minimum weights listed in Table 12 below: Table 12: Clutch Component Part Numbers Description Minimum Weight (lb.) Clutch disc 3.5 Pressure Plate 9.4 Flywheel 15.80 10. Transmission a. OE 2006-2015 6-speed gearbox and 4.10 final drive ratio are required. b. No modification of the internal parts and ratios are permitted except the installation of the unmodified parts contained in the Mazda Motorsports MX-5 transmission upgrade kit (part # 0000-02-5700). c. Mazda Motorsports Competition gear set 0000-02-6000 is allowed. Gear ratios are as follows: 1st - 3.82; 2nd - 2.26; 3rd - 1.64; 4th - 1.18; 5th - 1.00; 6th - 0.83/0.79. There are two (2) production 6th gears; either one is permitted. d. Alternate shift knobs are permitted. e. Nomex or aftermarket fireproof shift boots are permitted. Removal of the factory rubber shift boot is not permitted. f. No treating, coating, polishing or modification of any transmission or components are permitted. g. Fluids and/or lubricants may be substituted with any lubricant. h. Updating or backdating of transmissions from 2006–2015 is permitted; unmodified OE shifters must be retained. The use of short throw shifters is prohibited. i. An single inspection hole (not to exceed 1.5” in diameter) in the bottom of the bell housing is permitted for the sole purpose of technical inspection of the flywheel. It is permitted to plug or tape over theat hole. j. Transmission cooler(s) are permitted. 11. Differential a. Only the Following differentials are allowed. 1. Mazda Motorsports, unmodified, Torsen limited slip differential – 0000-02-5564 2. OE, unmodified, limited slip differential - Mazda part # MS03-27-200B 3. OE, unmodified, open differential are permitted. b. RX-8 differential mounting bracket (Mazda part # F151-39-730B) is permitted. c. Mazda Comp diff bushings 0000-04-5510 is permitted (MX-5 diff mount) d. Polishing, metal treatment or coating of differential or axle components are not permitted. e. Removal of metal/rubber isolator on the pinion flange is permitted. f. Differential cooler(s) are permitted. 12. Suspension and Steering: Suspension Modifications are limited to the addition of the Mazda Motorsports Spec MX-5 kit; details are as follows (including all modifications permitted): a. OE control arms are required; no modification is permitted. b. Mazda Motorsports’ TSB MX-5-002 must be followed re: the rear shock thread protector found in the “Spec MX-5: Four Pillars” page on MazdaMotorsports.com. The thread protector must measure 1.250”. (The TSB will not be applicable to the supply from Mazda Motorsports received after 7.15.2020 as they will have the updated thread protector.) c. Anti-roll bar links may be replaced with Mazda part # 0000-04-5597-KT 1. Cockpit adjustability is not permitted. d. Mazda Motorsports’ competition sway bars are required, mounting guidelines: 1. Metal shims up to 1/8” total thickness are permitted between each anti-roll bar mount shackle and the stock mounting point on the chassis. 2. One end of the sway bar(s) may be disconnected as a suspension tuning aid. 3. The bar must remain in place and be solidly attached to the suspension on one end. 4. Sway bar end links must be installed on the unmodified stock attachment points. e. Camber, caster, and toe are unrestricted within the limits of the unmodified factory adjust- ments in conjunction with Mazda Motorsports front offset bushing (part # 000-04-5407-NC). f. Minimum ride height is unrestricted. g. Nuts & bolts may be replaced by similar items performing the same fastening function(s). h. Relocation or reinforcement of any suspension parts or mounting points is not permitted, with the following exceptions: 1. Addition of spacers or washers on a horizontal plane is permitted at the rear lower shock mount to the spindle per the shock installation instructions. 2. Updating to RX-8 rear toe link and rear trailing arm is permitted. See Table 13 below. Table 13: Permitted RX-8 Trailing Arm and Toe Link Part #s Description Mazda Part # RX-8 Trailing Arm F189-28-200A RX-8 Toe Link F189-28-45XA i. OE power steering pump with pulley (Mazda part # NE51-32-650D) is required; Mazda Motor- sports Power steering flow restrictor PT#- 0000-04-5532 is permitted; no other modification is permitted. j. OE power steering rack (Mazda part #: NE51-32-110C) is required; no modification or reloca- tion is permitted. k. Factory power steering reservoir may be replaced. l. Wheel center caps must be removed. m. All chassis, structural and electrical repairs must follow factory procedures, specifications, and dimensions as described in the applicable service manual. Reinforcement (e.g., seam welding, material addition, etc.) is not permitted. n. Steering lock mechanisms must be removed. o. The distance from the outside of the wheel rim to outside of the opposing wheel rim for both the front and rear of the vehicle must not exceed 69.5”. I. The distance Measurement is obtained by measuring the distance between the wheel lips by going through the wheel spokes at the bottom of the wheel at its widest point via tape measure. (Measure the outside wheel lip of one wheel to outside wheel lip of the other wheel on same axle.) p. Mazda Motorsports’ competition rear toe link (part # 0000-04-5426) is permitted; no modification is permitted. q. Mazda Motorsport’s Spec MX-5 Suspension Kit includes the items set forth in Items in Table 14. seen below are components within this kit. No substitutions or modifications of parts are permitted. The unmodified kits must be used in their entirety, except as specified. Table 14: Spec MX-5 Suspension Kit (All parts are required; no modification is permitted.) Description Location Mazda Part # Shocks Front 0000-04-5291-SA Rear 0000-04-5292-SA Springs Front 0000-04-9700-08 Rear 0000-04-9400-07 Helper Springs Front/Rear 0000-04-9926 Front Penske Mount Kit Front 0000-04-5359 Rear Penske Mount Kit Rear 0000-04-5358 Sway Bar Kit Front and Rear 0000-04-5306-EB Offset Bushings Front 0000-04-5407-NC 13. Hubs a. OE RX-8 front hub (Mazda part # F189-33-04X) may be substituted in place of the OE Miata 2006-2015 front hub. b. Mazda Motorsports’ competition RX-8 rear hub upgrade kit (part # 0000-04-5811-KT) may be substituted in place of the OE MX- 5 rear hubs; this unmodified kit must be used in its entirety. c. OE RX-8 rear uprights, bearings, hubs, and hybrid axel may be used in place of OE MX-5 parts. 14. Brakes a. OE brake rotors must be used and adhere to the specifications below in Table 15. Table 15: Brake Rotor Dimensions Location Diameter Notes Front 290mm (11.4”) Vented Rear 280mm (11.0”) Solid Front backing plates/dirt shields may be removed. (see see red arrow in diagram below) b. Rear backing plates/dirt shields may be removed. (see red arrow in diagram below) c. Brake lines may be replaced with competition braided steel lines; option: Mazda Motorsports’ part # 0000-03-5212. d. The Factory ABS system must remain intact, unmodified, and in full working order. e. Brake slider pin may be used in either/both front location B25D-33-694. (This prevents a stuck sliding caliper due to the rubber grommet) f. Parking brake mechanisms and actuating components may be removed. g. Brake fluid is unrestricted. h. Mazda Motorsports’ competition brake duct kit (part # 0000-03-5301) is permitted. i. The forward vertical inner fender panels may be modified to fit the brake kit hose to the fog light openings but may not be modified to serve any additional purpose. j. Mazda Motorsports’ competition brake pads are required; see eligible brake pad compounds in Table 16. No other brake pads are permitted. Table 16: Brake Pad part numbers Pad Style Mazda Part # Notes Front Pad 0000-03-5104-SP RST-3 compound Rear Pad 0000-03-5116-29 RSL-29 compound 15. Wheels The following unmodified wheel options below in Table 17 are permitted for use. Table 17: WHEELS Description Color Mazda Part # 17x7” OE Wheel Gun Metallic 99656-47070 17x7” OE Wheel Silver 99656-77070 Mazda Motorsports’ Competition MX-5 Wheel Gun Metallic 0000-04-5706-GM Mazda Motorsports’ Competition MX-5 Wheel Silver 0000-04-5706-SL a. Wheels may be painted. b. Aftermarket (any) wheel studs and lug nuts are permitted., provided that a minimum of two he threads must protrude beyond the lug nut with the wheel installed with a minimum of two (2) full threads showing; Wheel studs may not be gun drilled. c. Wheel spacers are not permitted. 16. Tires a. Dry tires: Toyo RR P235/40/ZR17 b. Wet tires: Toyo RA1 P235/40/ZR17. 17. Electrical Equipment a. OE ignition coils (Mazda part # L3G2-18-100B) are required; no modification is permitted. b. Mazda’s competition spark plugs (part # 0000-10-R7IX-11) are required; no modification is permitted. c. The crankshaft position sensor and crankshaft pulley relationship must be as specified in the 2006- 2015 MX-5 Factory Service Manual. d. One of the two OE alternators (Mazda part # LF9H-18-300R-OA, L3P9-18-300D) is required; no modification is permitted. e. The alternator must not be externally regulated or disabled in any way other than by the OE production ECU/wiring circuit and master kill switch. f. The electronic control module (ECM) control circuit for alternator charging must be OE - unmodified and operational. g. One of the two OE alternator drive pulley part # AJ51-18-W10 (60mm), Part# L813-18- W11(55mm) is required; no modification is permitted. h. All sensors related to engine operating parameters must be used and must be stock, unmodi- fied Mazda parts for the correct year of the vehicle on which they are installed. i. Any and all sensors and their respective locations, mounts, and wiring harness leads may not be altered except as elsewhere in this rule set. e Spec-MX-5 rules. j. Any sensors required for non-OE gauges must be in addition to the Mazda sensors. k. All alternate gauge and sensors must have independent wiring. Splicing, tapping, or altering of the factory engine wiring harnesses is prohibited with the exception of adding an aftermarket tachom- eter/shift light as follows: 1. It is permitted to splice into the yellow wire with the black stripe (pin 2BA - Ignition Coil 1 control circuit) in the engine harness to obtain the tachometer signal for an aftermarket tachometer or shift light. 2. Splicing must be done within 5” of the ECU. l. Data acquisition’s sensor(s) may be added, provided they do not require splicing or alteration to the factory engine wiring harness. m. Batteries 1. Batteries may be replaced with those of an alternate manufacturer, provided they are of similar amp-hour capacity, and size, including lead acid or AGM.; lLithium batteries are not permitted. 2. Batteries must weigh no less than 18.0lb and no more than 35.0lb 3. Additional battery hold-down devices are recommended. 4. Battery MUST be moved from the original location to the passenger side in the upper trunk area in front of the tail lamp. This will require the use of a bulkhead that separates the driver / passenger compartment completely from the trunk and the battery location. See section 5.I for reference. 18. Roll Cage a. Roll cage must adhere to SCCA’s current GCR Section 9.4 for Touring 4 cars; with the following exceptions: 1. One tube not to exceed 1.75” in diameter may be added which extends from the door bars to the rocker panel on each side. The landing plate for this tube can be no longer than 5” in length. The landing plates must be centered between the front and rear landing plates for the lower NASCAR or X brace bar. 2. Main hoop mounting plates may be on multiple planes; however, they must not be greater than 19” on any side. b. Playboy MX-5 Cup car cages manufactured by Racing Cages, Inc. with the official serial number plate on the main hoop are allowed to retain the lower door bar and two 3” attachment points to the rocker panel on both the driver’s side and passenger side. No additional seam welding or lengthening of the original attachment points is allowed. 19. Safety a. An electrical master (“kill”) switch is required. See current GCR Section 9.3 Master Switch. b. Vehicle must be equipped with a driver’s restraint system meeting the specifications of current GCR Section 9.3 Drivers Restraint System. c. Installation of a fire extinguisher or fire system is required. See current GCR 9.3 Fire System. d. Vehicle must have a driver’s side window safety net complying with current GCR Section 9.3 Window Safety Nets. Nets must be mounted to provide protection in the event the driver’s door opens. 20. Data Acquisition 1 A technical evaluation process for cars is available from the Series. Part of this process is the required download of AiM Data files after each timed session (Qualifying 1 & 2, Races 1 & 2). Within 30 minutes of each timed session end, all Series Competitors MUST send the AiM Data file (.XRK) for all timed laps of that session to the secure email address (data@specmx-5.com), where data will be reviewed by AiM directly. Failure to adhere to this guideline from the Series, or having non- functioning data, may be grounds for penalty or disqualification by the Series. a. Vehicle must be equipped with current generation AiM data acquisition system (configurable in Race Studio 3) that can provide on track data to AiM race studio 3. The data acquisition system may only read the OBDII/ECU data stream. It is not permitted to alter/manipulate data to and from the ECU. The AiM system may be utilized to trigger a switch I.E., cooling fans or diff cooler pumps but must be wired via a separate analog circuit. Refer to Section 17: Electrical Equipment above for installation requirements. b. The connection at the OBDII port for the AiM system may be made in either one of two ways: 1. Through a dedicated OBDII AiM adaptor. 2. By direct wiring to the back of the OBDII port within 3” of the ODBII connector. c. Fuel pressure datalogging is required. d. Oil pressure datalogging is required. e. All cars must run the latest AIM Data Logger Spec MX-5 ECU Protocol 21. Mandatory Video Camera Cars running in Spec MX-5 must have a functioning video recorder/camera during all qualifying and race sessions as described in 9.3.11. Upon request by an SCCA official, competitors must provide their video recording/data, which may be used by the SCCA for any purpose including but not limited to rule enforcement and marketing. Failure to comply with a video request from an official, or having a non-functioning video recorder/camera may will be grounds for penalty or disqualification. 22. Parts Confiscation a. Tech officials may confiscate competitors’ parts for the purpose of verification of tech compliance. 23. Penalties Clarification – Non-Compliant Parts Level Infraction Penalty 1 Non-compliant modification to any of the spec parts, engine components, ECU/Elec- tronics or modification to the chassis. May suspend the driver (i.e. suspend) of the non- compliant Spec MX-5 from competing in SCCA events for the 12 months following the suspension. A level 1 infraction carries a $1,000 fine. 2 Non-compliant modification to the suspen- sion or drivetrain outside of level one infrac- tions: engine, fuel system, charging system, exhaust, and intake system. May suspend the driver (i.e. suspend) of the non- compliant Spec MX-5 from competing in SCCA events for the 6 months following the suspension. A level 2 infraction carries a $500 fine. 3 Use of an unauthorized or non-compliant part, engine component, ECU/Electronics or chassis or chassis part. May suspend the driver (i.e. suspend) of the non- compliant Spec MX-5 from competing in SCCA events for the 12 months following the suspension. A level 3 infraction carries a $1,000 fine 4 Non-compliance (non-modification such as incorrect part)Use of an unauthorized or non- compliant for any of the suspension or drive- train part or component outside of level one infractions: engine, fuel system, charging system, exhaust, and intake system. May suspend the driver (i.e. suspend) of the non- compliant Spec MX-5 from competing in SCCA events for the 6 months following the suspension. A level 4 infraction carries a $500 fine
slowerSTU Mini Cooper S SC 1900 restricts to 2.565 diameter pulley; 2100 allows 2.285 diameter pulley.
As printed in 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."
wordingT3 VW Golf R (12-13 and 15-18) 36mm TIR placement now allows OEM turbo inlet, removing 60mm distance limit from impeller.
As printed in Fastrack
In T3 Spec Lines, Volkswagen Golf R (12-13), change Restrictor Required as follows: "36mm TIR max 60mm from impeller TIR may be placed in the OEM turbo inlet as long as the restriction is entirely within the leading edge of the housing." In T3 Spec Lines, Volkswagen Golf R (15-18), change Restrictor Required as follows: "36mm TIR max 60mm from impeller TIR may be placed in the OEM turbo inlet as long as the restriction is entirely within the leading edge of the housing."
T3 Redundant Verbiage Regarding Mustang Spec Lines for Driveshaft
wordingT2 and T3 Mustang spec lines remove redundant driveshaft alternate/aluminum allowance wording.
As printed in Fastrack
In T2 Spec Lines, change Notes as follows: Ford Mustang V6 (11-14): "Alternate driveshaft is allowed." Ford Mustang Boss 302 (12-13): "Alternate driveshaft is allowed." Ford Mustang GT 5.0L (11-14): "Alternate driveshaft is allowed." Ford Mustang GT 5.0L (15-17): "Alternate driveshaft is allowed." Ford Mustang GT 5.0L (2018-): "Alternate driveshaft is allowed. Springs up to 800#/in front and rear permitted. Alternate metallic driveshaft permitted." Ford Mustang Coupe GT & Shelby GT 4.6L (05-10): "Alternate driveshaft is allowed."
Show 4 more lines
In T3 Spec Lines, change Notes as follows: Ford Mustang Coupe GT & Shelby GT 4.6L & Cal. Special (05-10): "Alternate driveshaft is allowed." Ford Mustang V6 (11-14): "Alternate driveshaft is allowed." Ford Mustang V6 (05-10): "An Aluminum driveshaft is allowed."
wordingSMX allows OE instrument cluster relocation for aftermarket dash mounting, with wiring re-routed only; alternate gauges now permitted.
As printed in Fastrack
In GCR, Section 9.1.7.D.5.u-w, change as follows: "u. Alternate guages and instuments may be added. The original OE instrument cluster must remain unmodified, connected and functional. However, it may be relocated to allow the mounting of an aftermarket dash such as an AIM. The wiring to relocated the dash may not be cut or extended, it may only be re-routed. The remainder of teh dashboard or panel must remain intact. v. Alternate gauges and instuments may be added. w. Modifications may be made to the foot pedals to improve the comfort and accessibility to the driver; relocation of mounting points is not permitted. 1. Dead pedal/footrest and heel stop may be added.
wordingT2, T3, T4 fuel cell installations may remove charcoal canisters, emissions valves, and sensors.
As printed in Fastrack
In GCR, Section 9.1.9.2.D.1.c. add the following: "5. Removal of ancillary fuel tank equipment charcoal canisters, emissions valves, and sensors allowed for OEM or aftermarket fuel cell installations."
wordingT2, T3, T4 brake component wording clarified: 2-piece rotors allowed in T2 within 5% OE diameter, T3 within 2% OEM diameter.
As printed in Fastrack
In GCR, Section, 9.1.9.2.D.6. Brakes, change as follows: "a. Components 1. The make and material of brake pads and linings may be changed. 2. Brake fluid may be substituted with any brake fluid. 3. Brake rotor dust shields may be removed or replaced to accommodate brake ducts. 4. Flexible rubber brake lines may be replaced with Teflon lined, metal braided hoses. 5. Any brake ducts are permitted, but they must serve no other purpose. Fender liners may be modified solely for routing and attachment of brake ducts. Duct intake openings may be created by the opening of 2 sections up to 14.5 square inches each in
Show 10 more lines
the front fascia. The stock headlamp location is not permitted for brake ducting. Two alternative duct openings may be created by the removal of the fog lights or 2 sections up to 14.5 square inches each of stock false grills originally located in the front fascia. 6. Stock replacement brake rotors may be obtained from sources other than the manufacturer provided they are the exact equivalent of the stock rotors. In T2 only - 2-piece rotors with ferrous metal rotor disks and aluminum hats are allowed, must be within 5% of OE diameter. In T3 only - 2-piece front rotors with ferrous metal rotor disks and aluminum hats are allowed, must be within 2% of OEM diameter. Drilled and slotted rotors are permitted. 7. Parking brakes, mechanisms, and actuating components may be removed. 8. Brake vacuum reservoirs sized 0.50 gallons or smaller are permitted. The port or fitting at the vacuum source may not be modified, enlarged or relocated. The vacuum reservoir and brake booster must be a closed system."
wordingT2, T3, T4 fuel cell cars may remove charcoal canisters, emissions valves, and sensors.
As printed in Fastrack
In GCR, Section, 9.1.9.2.D.1.c., add the following: "5. Removal of ancillary fuel tank equipment; charcoal canisters, emissions valves, and sensors allowed for OEM or aftermarket fuel cell installations."
STU Request to Remove Miata Hubs from General category
wordingSTL/STU: 90-05 Mazda Miata alternate front wheel hubs moved from General to specific part approval.
As printed in 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."
T3 Allow Spec MX5 upgrade kit for 2009-11 RX8 S2 Transmision
wordingT3 and T4 Mazda RX-8 and MX-5 permit transmission kit #0000-02-5700.
As printed in Fastrack
In T4 Spec Lines, add the following to Notes: Mazda RX-8 Base/R3/Sport/ GT (04-12): "Transmission kit # 0000-02-5700 permitted. Mazda MX-5 / Club Model (06-15): "Transmission kit # 0000-02-5700 permitted." In T3 Spec Lines, add the following to Notes: Mazda MX-5 / Club Model (06-15): "Transmission kit # 0000-02-5700 permitted." Mazda RX-8 Base/R3/Sport/ GT (04-12): "Transmission kit # 0000-02-5700 permitted."
slowerSTU BMW N54/N55 turbo inlet restrictors now required per GCR definition; turbo swapping prohibited.
As printed in 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.
wordingT4 BMW 320i 14-15 Spec Line expires 12/31/24 removed; Turner Motorsports intercooler #024703TMS02 allowed.
As printed in Fastrack
In T4 Spec Lines, BMW 320i (14-15), change Notes as follows: "**This Spec line will expire 12/31/24, Please submit to appeal** Turner Motorsports intercooler #024703TMS02 allowed."
T3 Classification for a 2005 Cadillac CTS 3.6 liter 6 speed manual
fasterT3 Subaru WRX STI 03-07 drops 100 lbs to 3200; Legacy GT/Spec B 05-09 drops 150 lbs to 3200.
As printed in Fastrack
In T3 Spec Lines, Subaru WRX STI (03-07), change Weight as follows: "3300 3200" In T3 Spec Lines, Subaru Legacy GT/Spec B (05-09), change Weight as follows: "3350 3200"
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.
Show 2 more lines
(CC) Head Type Valves /
A specification table follows in the original; it is not shown here.
T3 Request to Move Spec Mustang to Touring 3 (from T2)
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.
fasterT3 Ford Mustang V6 (11-14) and (15-17) now permit cold air intake.
As printed in Fastrack
In T3 Spec Lines, Ford Mustang V6 (11-14), add to Notes the following: "Cold air intake permitted." In T3 Spec Lines, Ford Mustang V6 (15-17), add to Notes the following: "Cold air intake permitted."
Applies to Ford Mustang on this page: Scotty B White, Roger Eagleton, Matt Lituchy, Michael Lowe, Rick Luckett
In T2, Effective 1/1/2025, delete for following Spec Lines in their entirety: "Acura TL SHAWD (10-13) Audi S4 (12-14) Audi S5 (13-14) Audi TT RS (2018-) Cadillac ATS-V (16-17) Cadillac CTS-V (06-07) Chevrolet Camaro SS (98-02)
Show 49 more lines
Honda Civic Type-R (2017-) Saturn Sky / Convertible (07-09)" In T3, Effective 1/1/2025, delete for following Spec Lines in their entirety: "Audi TTS Coupe (10-11) Cadillac ATS (2015) Chevrolet Cobalt (05-07) Dodge SRT-4 (03-05) Ford Fiesta ST (2014-) Hyundai Genesis Coupe (2010-) Hyundai Veloster Turbo (18-21) Mini Cooper S (2016-) Toyota Camry (11-15)" In T4, Effective 1/1/2025, delete for following Spec Lines in their entirety: "Acura Integra GS-R VTEC (3 or 4 door) (94-01) Audi A4 V-6 (96-01) / Volkswagen Passat 2.8 V6 (96-05) Chevrolet Cobalt SS, Sport Coupe (06-10) Chevrolet Sonic RS (2011-) Chrysler/Dodge Neon ACR SOHC (4 door) (01-02) Dodge Dart (14-15) Dodge/Plymouth Neon ACR SOHC/DOHC (2/4 door) (95-99) Fiat 500 Abarth (12-14) Ford Focus SVT (02.5-04) Ford Focus ZX4 ST (05-06) Ford Focus (08-11) Ford Mustang V-6 (01-04) Honda Accord LX & EX (03-07) Honda Accord LX-S/EX/EX-L (08-12) Honda Civic Coupe Si (99-00) Honda Civic SI (02-03) Hyundai Elantra GLS (11-12) Hyundai Tiburon V-6 (03-08) Hyundai Veloster Turbo/ R-Spec (14-15) Kia Forte Koup and Sedan LX/EX (10-13) Kia Forte Koup and Sedan SX (10-13 Kia Forte Koup (14-15) Mazda Protégé ES (2000) Mazda Protégé 5 (02-03) Mazda6 s (03-07) Mitsubishi Eclipse GT (00-05) Nissan Sentra SER (02-03) Pontiac Firebird V-6 (96-02) Scion tC (03-07) Subaru Impreza (non-turbo) (04-06) Toyota Celica GT (00-05) Toyota Celica GTS/GT (00-05) Volkswagen Golf TDI (2010) Volkswagen Passat (12-14) Volkswgen Passat TDI (12-14) Volkswgen Passat 1.8T (2014-)"
slowerSTU GT3 TCR gains 275-width tire option with 100 lb weight penalty, but not in A compound.
As printed in 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."
fasterGT2 STO aftermarket ABS weight penalty reduced from 100 lbs to 50 lbs.
As printed in 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."
unclearGT2 Pontiac Fiero changes from FWD to RWD; hood bulge permitted for front engine relocation.
As printed in 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."
engineSTU BMW N54/N55 3.0L classified at Chart +3% minimum weight; N54 twin turbo not allowed.
As printed in 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
slowerTA2 and STO OEM wings no longer exempt from rear wing height rule at roof peak.
As printed in 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."
STU STU Mini Cooper pulley size clarification re: letter #36980
wordingSMX Toyo RR P235/40/ZR17 tire rules clarified: one set per weekend, marking after first session, damage replacement procedures revised.
As printed in Fastrack
In GCR, Section 9.1.7.1.D.16.c., change as follows: "1. Cars in SMX are limited to running 1 (one) new (sticker) set, used tires or any of those combinations, of class specified Toyo tires (Toyo RR P235/40/ZR17) per regular season Hoosier Super Tour event weekend during qualifying and races (not including any test day sessions). Before the first dry qualifying or race (if rain in qualifying) session competitors will supply four Toyo RR P235/40/ZR17 tires for marking to use during the entire weekend. Class specified rain tires will not be marked. SMX cars are limited to one set of Toyo RR P235/40/ZR17 per Hoosier Super Tour event weekend for all dry qualifying and race sessions. This limitation does not include testing or practice sessions. Approved rain tires will not be required to be marked. 2. A mandatory impound for all SMX competitors is required after the first dry qualifying or race (if rain in qualifying) session. It
Show 11 more lines
is the competitor’s responsibility to ensure their tires are marked prior to going on track for the next session. A mandatory impound for all SMX competitors will occur after the first dry qualifying or race session. All tires will be marked for the remainder of the race weekend. It is the competitor’s responsibility to report to impound and ensure their tires are marked prior to leaving impound. 3. If a competitor damages a tire or wheel, and there is a safety concern, the competitor must find the Hoosier Super Tour Series Tech Chief or SMX CCC, if assigned, for inspection. At the direction of the Hoosier Super Tour Series Tech Chief or SMX CCC, the compet- itor will be allowed to substitute alternate used tire(s) to replace the damaged tire(s). New tires are not an option as a replacement tire for a damaged tire. If a competitor damages a tire or wheel and there is a safety concern, the competitor must find the Hooseir Super Tour Series Tech Chief or SMX CCC, if assigned, for inspection. At the discretion of the Hoosier Super Tour Series Tech Chief of SMX CCC the competitor may be allowed to substitute alternate used tires(s) to replace the damaged tire(s). New tires are not an option as a replacement tire for a damaged tire."
wordingSTU wheel width rules clarified: cars ≤2,850 lbs max 8 inches, cars >2,850 lbs max 9 inches.
As printed in 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."
wordingSMX data submission deadline extended from 30 to 60 minutes after each timed session.
As printed in Fastrack
RM 25-04 Please update the data acquisition timeframe in GCR section 9.1.7.1.D.20 "20. Data Acquisition 1. A technical evaluation process for cars is available. Part of this process is the required download of AiM Data files after each timed session (Qualifying 1 & 2, Races 1 & 2). Within 30 60 minutes of each timed session end, all competitors MUST send the AiM Data file (.XRK) for all timed laps of that session to the secure email address (data@specmx-5.com), where data will be reviewed by AiM directly. Failure to adhere to this guideline, or having non-functioning data, may be grounds for penalty or disqualification."
unclearT3 BMW Spec E46 rules updated to Version 3.0 from Version 1.1.
As printed in Fastrack
In T3 Spec Lines, BMW Spec E46, change Notes as follows: "Must conform to all SpecE46 rules Version 2.10. Version 1.1 dated Jan. 6, 2025. Version 3.0."
fasterSTU Spec Line GT3U minimum weight reduced from plus 250 to plus 225 pounds; wheel and tire options clarified with weight adjustments.
As printed in 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
wordingSMX drivers must submit data acquisition files on time or face suspension and $250 fine.
As printed in Fastrack
In GCR, Section 9.1.7.1.23 add new level 5 infraction as follows: Level: "5" Infraction: "Failure to successfully submit (received by data@specmx-5.com) data acquisition file to data@specmx-5 per the timeframes outlined in GCR section 9.1.7.1.20." Penalty: "May suspend the driver (i.e. suspend) of the Spec MX-5 that failed to submit data on time or at all from competing in SCCA events for the 3 months following the suspension. A level 5 infraction may carry a $250.00 fine."
SMX Committee) SMX Penaly Clarification updated language
wordingSMX penalty language clarified: level 1 and 3 infractions may carry $1,000 fine; level 2 and 4 may carry $500 fine.
As printed in Fastrack
In GCR, Section 9.1.7.1.23. change as follows: Rename as follows: "Penalties Clarification – Non-Compliant Parts SMX Penalty Guidelines" Change the Penalty language for level 1 to the following: "A level 1 infraction carries may carry a $1,000 fine." Change the penalty language for level 2 to the following: "A level 2 infraction carries may carry a $500 fine." Change the penalty language for level 3 to the following: "A level 3 infraction carries may carry a $1,000 fine." Change the penalty language for level 4 to the following: "A level 4 infraction carries may carry a $500 fine."
unclearSTU 2.8-3.2L N/A engines now allow 245 max tire width; over 3150 lbs may run 275 with 2% weight penalty.
As printed in 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."
unclearBMW Spec E46 in T3 updates to SpecE46 rules Version 3.0.
As printed in Fastrack
In T3 Spec Lines, BMW Spec E46, change Notes as follows: "Must conform to all SpecE46 rules Version 2.10. Version 1.1 dated Jan. 6, 2025. Version 3.0."
cars addedSTU Honda JDM H23a added, 2259cc displacement, minimum weight per Chart, must meet ST engine regulations.
As printed in 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.
wordingGT2 Porsche 911 Coupe & Targa may use 993 3.8 RSR rear deck lid or approved aftermarket reproductions.
As printed in 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."
slowerSTU-TCR tire width increases to 275 with weight adder raised from 100 to 150 pounds.
As printed in 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."
wordingT3 and T4 Mazda MX-5 Miata models add approved gear kit PT#-0000-02-6100 to notes.
As printed in Fastrack
In T4 Spec Lines, Mazda MX5 Miata/Club/ RF (19-24), add to Notes the following: "Gear kit Kit PT#- 0000-02-6100." In T4 Spec Lines, Mazda MX-5 Miata/Club (16-18), add to Notes the following: "Gear kit Kit PT#- 0000-02-6100." In T3 Spec Lines, Mazda MX-5 Miata (16-18), add to Notes the following: "Gear kit Kit PT#- 0000-02-6100." In T3 Spec Lines, Mazda MX-5 Global Cup Miata (2016-2021) ND1, ND, add to Notes the following: "Gear kit Kit PT#- 0000-02-6100."
wordingT4 Mazda MX-5 Miata/Club/RF (19-24) and (16-18) remove discontinued hardtop part #0000-07-5901; T3 MX-5 Miata (16-18) and Global Cup ND (16-21) same.
As printed in Fastrack
In T4 Spec Lines, Mazda MX5 Miata/Club/ RF (19-24), change Notes as follows: "Factory bolt-in roll bar/ cross member may be removed to facilitate roll cage installation. The following item(s) must remain stock: transmission differential unless specified below. Retractable hardtop option permitted but must be disabled from moving action and positively fastened. Any OEM or aftermarket hardtop is permitted that retains the OEM roof silhouette, including Mazda hardtop part #0000-07-5902-ND and part #0000-07-5901 (discontinued DG Motorsports). 29mm (f) 16mm (r) sway bars allowed. 3rd and 4th gear may be replaced with the following parts- (0000-02-5803-02, 0000-02-5803-01, 0000-02-5804-02, 0000-02-5804-01). Suspension package permitted with a 100 lbs. weight increase that includes the following parts: front springs #0000-04-9700-08, springs up to 500lb front and 300lb rear allowed. Mazda tower brace 0000-04-5626 allowed. Mazda header
Show 20 more lines
0000-06-5410 allowed." In T4 Spec Lines, Mazda MX-5 Miata/Club (16-18), change Notes as follows: "Factory bolt-in roll bar/ cross member may be removed to facilitate roll cage installation. Retractable hardtop option permitted but must be disabled from moving action and positively fastened. Any OEM or aftermarket hardtop is permitted that retains the OEM roof silhouette, including Mazda hardtop part #0000-07-5902-ND and part #0000-07-5901 (discontinued DG Motorsports). 29mm (f) 16mm (r) sway bars allowed. Up to 500lb front and 300lb rear springs allowed. Mazda Motorsports Header part #0000-06-5410 allowed. Mazda tower brace 0000-04-5626 allowed. 3rd and 4th gear may be replaced with the following parts- (0000-02-5803-02, 0000-02-5803-01, 0000-02-5804-02, 0000-02-5." In T3 Spec Lines, Mazda MX-5 Miata (16-18), change Notes as follows: "Factory bolt-in roll bar/ cross member may be removed to facilitate roll cage installation. Header permitted. Cold air intake permitted. Front strut brace permitted. Front and rear sway bars permitted up to 35mm, Springs 800 front and 800 Rear max permitted. Any OEM or aftermarket hardtop permitted that retains the OEM roof silhouette including Mazda hardtop part #0000-07-5902- ND and part #0000-07-5901 (discontinued DG Motorsports top). If a hardtop is used, latches shall be replaced with positive fasteners. Retractable hardtop option permitted but must be disabled from moving action and positively fastened. In T3 Spec Lines, Mazda MX-5 Global Cup Miata (2016-2021) ND1, ND, change Notes as follows: "Shoulder harness installation must conform to FIA mounting specifications that are approved for this vehicle per section 6.2 FIA article 253, safety equipment. Must meet all ND2 MX-5 Global Cup rules. Any OEM or aftermarket hardtop is permitted that retains the OEM roof silhouette, including Mazda hardtop Mazda hardtop part #0000-07-5902-ND and #0000-07-5902-ND part #0000- 07-5901 (discontinued DG Motorsports). If a hardtop is used, latches shall be replaced with positive fasteners. OBD2 requirement does not apply. Ballast box may be removed. ND2s with sequential gearbox allowed +100 lbs.
slowerSTU cars over 3150 lbs lose 275-tire option with 2% weight adder.
As printed in 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."
unclearT3 Ford Mustang EcoBoost loses optional 2-piece 355mm Brembo rotor brake kit option with 50 lb penalty.
As printed in Fastrack
In T3 Spec Lines, Ford Mustang EcoBoost (2015-), change Notes as follows: ", or optional 2-piece rotor 355mm max Brembo brake kit #M-2300-S allowed with +50lb penalty."
Applies to Ford Mustang on this page: Scotty B White, Roger Eagleton, Matt Lituchy, Michael Lowe, Rick Luckett
cars addedGT2 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.
As printed in 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
Show 12 more lines
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"
T3 Request to Allow Spec Mustang to Touring 3 in Appendix M Trim
fasterT3 BMW Spec E9X tire width increases to 255 from 225; spec E9X tire or any DOT permitted.
As printed in Fastrack
In T3 Spec lines, BMW Spec 9X, change as follows: Car: "BMW Spec 9X BMW Spec E9X" Notes: "Must conform to all SpecE9X rules Version 2.10. Spec E9X spec tire permitted or any DOT permitted up to 225 255 permitted. No other touring allowances permitted. Engines may not be modified unless specified in the Spec E46 rules and must conform to touring tech procedures. Driver must possess a current copy of the rules. Dyno results do not ensure engine compliance. THIS SPEC LINE DOES NOT QUALIFY FOR SCCA RUNOFFS COMPETITION UNTIL IT HAS BEEN REPRESENTED IN 3 SCCA SUPER TOUR EVENTS."
fasterT3 SpecE46 permitted tire width increases from 225 to 245.
As printed in Fastrack
In T3 Spec Lines, BMW SpecE46, change Notes as follows: "Must conform to all SpecE46 rules Version 3.0. SpecE46 spec tire permitted or any DOT permitted up to 225 245 permitted. No other touring allowances permitted. Engines may not be modified unless specified in the Spec E46 rules and must conform to touring tech procedures. Driver must possess a current copy of the rules. Dyno results do not ensure engine compliance. SE46 HP limit does not apply."
wordingT2, T3, T4 cars may relocate under-dash electronics and fuse boxes for access after roll cage installation.
As printed in Fastrack
In GCR, Section 9.1.9.2.D.9.d, add the following: "8. Under-dash electronics including computers, modules and fuse boxes may be relocated so they can be easily accessed after roll cage installation."
suspension & brakesT4 Performance now permits 1-piece alternative rotors matching spec line sizes; alternate brake kits allowed same.
As printed in Fastrack
In GCR, Section 9.1.9.2.D.6.a.6., change as follows: "In T2-Performance alternative rotors, including 2 piece rotors are permitted. Rotors must be within 5% of OE diameter or a maximum diameter of 360mm. In T3- Performance alternative rotors, including 2 piece rotors are permitted with a maximum diameter of 360mm. T4- Performance alternative 1-piece rotors are permitted but rotors must meet the sizes listed in the spec line. Spec lines showing alternate brake kits are also permitted to use 1-piece performance alternative rotors of the same size."
STU Request for Permission on Aftermarket Turbo Kit and Intake
fasterSTU Mazda MZR (LF, L3, L5) Turbo classified; Jack Spania Racing 70 mm intake manifold and Fab9 Tuning bottom-mount turbo kit approved.
As printed in 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
Show 7 more lines
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.
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.
As printed in 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
Show 49 more lines
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"
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.
As printed in 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.
cars addedM3 E92 classified in GT2 with 3999cc V8, 35mm restrictor, 3300 lbs minimum weight.
As printed in 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.
Show 5 more lines
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.
T3 Please change 2011-2014 Mustang V6 Spec Line to 2005-2014
fasterT2-T4 adjustable toe links now allow performance alternative bushings and spherical bearings, previously prohibited except in specified examples.
As printed in Fastrack
In GCR, Section 9.1.9.D.5.a.1., change as follows: "T2-T4: A maximum of 3.5 degrees of negative camber is allowed on front and rear suspensions. Spec line part(s) may not be modified to increase caster and camber. Strut suspensions may adjust camber and caster by the use of eccentric bushings, eccentric bolts (crash bolts) at the strut-to-spindle, and/or by use of slotted adjustment plates at the top of the strut mounting plate. If upper strut slotted adjustment plates are used, they shall be located on existing chassis structure, utilizing the unmodified manufacturer’s original bolt holes and may not serve as reinforcement for that structure. Slotted adjustment plates (strut camber plates) may incorporate a single spherical bearing (spherical bushing) and a ball thrust bearing per strut tower. On other forms of suspension, camber and caster adjustment may be achieved by the use of shims and/or eccentric
Show 4 more lines
bushings. Adjustable toe links with spherical bearings are permitted and may serve no purpose other than adjusting toe angle. Adjustable toe links are permitted. They are allowed to have performance alternative bushings and spherical bearings. They may serve no purpose other than adjusting toe angle. Spherical bearings/bushings are not permitted in T2-T4 except for the specific examples listed in the class rules or vehicle spec line."
What the rules allowed changed as listed; this does not say what any particular car ran.