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
S2 IM1 → IM2
S3 IM2 → SF
SPd IM2 → IM3 0.02 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
SCCA Ent FE2
FE2
22
1:22.889Franklin Futrelle
1:23.136Franklin Futrelle
1:23.500Franklin Futrelle
138.5Paul Schneider
31.178Franklin Futrelle
30.106Franklin Futrelle
21.358Franklin Futrelle
SCCA Enterprises FE2
FE2
14
1:23.128Franklin Futrelle
1:23.128Franklin Futrelle
1:24.454Charles Russell Turner
141.1Eric Cruz
31.170Franklin Futrelle
30.324Charles Russell Turner
21.417Charles Russell Turner
SCCA Enterprises FE2 Mazda
FE2
1
1:29.575James Brookshire
1:29.575James Brookshire
1:31.744James Brookshire
135.8James Brookshire
34.769James Brookshire
32.012James Brookshire
23.091James Brookshire
SCCA Ent SRF3
SRF3
77
1:33.550Peyton Long
1:33.550Peyton Long
1:33.785Richard Baldwin
148.7Robeson Clay Russell
35.267Robeson Clay Russell
0.719Steve Zemaitis
21.112Robeson Clay Russell
Porsche Cayman
T2
1
1:33.885Raphael Assuncao
1:33.885Raphael Assuncao
1:34.704Raphael Assuncao
142.3Raphael Assuncao
37.120Raphael Assuncao
33.234Raphael Assuncao
23.908Raphael Assuncao
SCCA Spec Racer Ford Gen 3
SRF3
36
1:34.195Charles Russell Turner
1:34.195Charles Russell Turner
1:34.485Mark Eaton
128.8Derek Schofield
35.651Charles Russell Turner
34.194Charles Russell Turner
24.192Charles Russell Turner
Chevrolet Corvette
T2
3
1:34.508William Bolt
1:34.519James Davidson
1:34.508William Bolt
140.5James Davidson
37.011James Davidson
33.448James Davidson
23.884William Bolt
Chevrolet Corvette
T2
2
1:34.508William Bolt
1:34.519James Davidson
1:34.508William Bolt
140.5James Davidson
37.011James Davidson
33.448James Davidson
23.884William Bolt
Chevrolet Corvette Z06
T2
1
1:45.413Carl Fung
1:45.413Carl Fung
123.5Carl Fung
41.799Carl Fung
36.099Carl Fung
27.416Carl Fung
Ford Mustang
AS/T2
4
1:34.642Michael Kamalian
1:35.467Thomas J Ellis
1:34.642Michael Kamalian
140.9Michael Kamalian
37.067Michael Kamalian
32.639Thomas J Ellis
24.028Michael Kamalian
Ford Mustang
AS/T2
3
1:34.642Michael Kamalian
1:35.467Thomas J Ellis
1:34.642Michael Kamalian
140.9Michael Kamalian
37.067Michael Kamalian
32.639Thomas J Ellis
24.028Michael Kamalian
Ford Mustang GT
AS
1
1:36.389James Jost
1:38.195James Jost
1:36.389James Jost
138.6James Jost
38.069James Jost
32.794James Jost
24.669James Jost
BMW M2 CSR
T2
5
1:34.747Aaron Kaplan
1:36.511James Keown
1:35.906James Keown
138.4Aaron Kaplan
36.644Aaron Kaplan
33.662Aaron Kaplan
23.977Aaron Kaplan
BMW M2 CS
T2
1
1:34.747Aaron Kaplan
1:37.470Aaron Kaplan
1:36.268Aaron Kaplan
138.4Aaron Kaplan
36.644Aaron Kaplan
33.662Aaron Kaplan
23.977Aaron Kaplan
BMW M2
T2
1
1:35.906James Keown
1:36.511James Keown
1:35.906James Keown
136.4James Keown
37.958James Keown
33.693James Keown
24.001James Keown
BMW M2 CS Racing
T2
1
1:37.992Judson Holt
1:38.065Judson Holt
1:37.992Judson Holt
137.3Judson Holt
38.390Judson Holt
34.067Judson Holt
24.900Judson Holt
BMW M2 CSR
T2
2
1:39.573Russell King
1:40.965Russell King
1:39.573Russell King
132.3Russell King
39.202Russell King
34.624Russell King
24.898Russell King
BMW M240iR
T2
1
1:34.798Basam Abdallah
1:39.165Basam Abdallah
1:34.798Basam Abdallah
133.4Basam Abdallah
37.088Basam Abdallah
33.033Basam Abdallah
23.976Basam Abdallah
Dodge Viper
T2
1
1:35.938Scotty B White
1:36.633Scotty B White
1:35.938Scotty B White
141.5Scotty B White
38.121Scotty B White
33.315Scotty B White
24.407Scotty B White
Cadillac CT4 Blackwing
T2
1
1:37.871John Heinricy
1:38.566John Heinricy
1:37.871John Heinricy
137.3John Heinricy
38.469John Heinricy
34.258John Heinricy
24.781John Heinricy
BMW 330CI
T2
1
1:40.878Todd Clarke
1:40.878Todd Clarke
108.0Todd Clarke
45.548Todd Clarke
39.106Todd Clarke
29.400Todd Clarke
Chevrolet Camaro Z-28
AS
1
1:44.301Phillip Waters
1:44.301Phillip Waters
2:00.265Phillip Waters
130.0Phillip Waters
42.124Phillip Waters
35.315Phillip Waters
26.862Phillip Waters
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
Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta → Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta 2023-03-10 to 2024-03-08
T2 Allowance of any nonmetallic bushing material in T2
suspension & brakesT2 upper and lower control arm bushings can now use polyurethane, delrin, or alternate synthetic materials.
As printed in Fastrack
In Touring (T2-T5) Category Specifications, GCR Section 9.1.9.2.D.5.c.1., change as follows: "All T2-T3 cars are allowed to replace OEM upper and lower control arm bushings with polyurethane, or delrin, or alternate synthetic materialbushings."
unclearSRF Hoosier wet front tire updated to P/N 46100 P185/60R13 H20 or W2.
As printed in Fastrack
In SRF, GCR section 9.1.8.D.1.X.f, change as follows: "Wet: Front – Hoosier P/N 46100 P185/60R13 H20 or W2 Rear – Hoosier P/N 46105 P205/60R13 H20 or W2 Ground clearance is 2.5" with driver as raced when P185/60R13 (H20 or W2) tires are used."
T2 370Z Obsolete Parts & NISMO Alternatives to SPL Parts
wordingT2 Nissan 370Z allows NISMO suspension alternatives to SPL parts; rear toe arms removed from permitted list.
As printed in Fastrack
In T2 Spec Lines, Nissan 370Z (09-17) / 370Z NISMO Edition (09-17), change Notes as follows: 5300S-SS370 T-2 spring kit allowed; 54600-SS370 T-2 front and rear sway bar kit allowed. Sway Bars allowed 35mm (f). 29mm (r). Sports Package is allowed. Springs up to 1000 lbs/in front and rear allowed. 54010- SZ350 (F) and 55020-SZ350 (R) allowed. Cold Air Intake allowed. Performance Alternative Header permitted - Part #14002-SS370. Rear spring relocation permitted to allow coil over shocks. SPL suspension kit permitted that includes: rear camber arms #SPL RLL Z34 or Nismo 551A0-RLLRZ, SPL rear toe arms #SPL RTA Z34, SPL rear traction arms #SPL RTR Z34 or Nismo 55110-RTRRZ, SPL front camber arms #SPL FUA Z34 or 54525-FUAZ4, SPL rear mid link #SPL RML Z34 or Nismo 551B0-RMLZ4. Zspeed and Z1 alternative clutch slave permitted. The following STOPTECH parts are allowed with a 50 Lb penalty: #83.488.6800.51 front, 83.657.0057.51 rear.
wordingAS crate motor part number specified: GM Performance CT400 P/N 19370604 engine assembly for GM vehicles.
As printed in Fastrack
In AS, GCR Section 9.1.6.F.2., change as follows: "GM Performance parts CT400 P/N-1937 → 0604 or 1937 → 0604 engine assembly for GM produced vehicles."
wordingAS Dodge Challenger 5.7L/6.1L/6.4L V8 now permits SPC-66045 alternate front upper control arms.
As printed in Fastrack
In AS SPEC Lines, Dodge Challenger (08-20) Restricted Preparation 5.7L, 6.1L, or 6.4L V8 (Iron block, Aluminum heads), 2 valves/cylinder, change Notes as follows: "SPC-66045 Alternate front upper control arms are permitted."
AS Front Brake Caliper Adapters for Dodge Challenger
wordingAS Dodge Challenger 5.7L/6.1L/6.4L V8 allows alternate front brake caliper adapters for updated or backdated components.
As printed in Fastrack
In AS SPEC Lines, Dodge Challenger (08-20) Restricted Preparation 5.7L, 6.1L, or 6.4L V8 (Iron block, Aluminum heads), 2 valves/cylinder, change Notes as follows: "Stock brakes or alternate Dodge brakes (Part numbers: front caliper (0517 → 5106 (R) and 0517 → 5107 (L); rear caliper (R1542564 (R) and R1542565 (L))) may be used with the brake rotor sizes listed in this specification line. Alternate brackets may be used to facilitate updated/backdated components."
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:
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(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."
wordingT2 Cadillac CT4-V Blackwing permitted to use Radium fuel surge tank behind fireproof bulkhead.
As printed in Fastrack
In T2 Spec Lines, Cadillac CT4-V Blackwing (2022-), add to Notes the following: "Radium fuel surge tank permitted. Radium tank and all associated hoses must be located behind a fireproof bulkhead or in the engine compartment."
Applies to Cadillac CT4 Blackwing on this page: John Heinricy
wordingSRF radiator rule clarified: P/N 480466 replaceable with Automotive P/N 1R698, CU698 or manufacturer equivalent with documentation.
As printed in Fastrack
In SRF, GCR section 9.1.8.D.1.V.j, change as follows: "Radiator - Enterprises new style P/N 480465 (requires baffle P/N 480464) or P/N 480466 can be used. P/N 480466, may can be replaced with Automotive P/N 1R698, CU698 or equivalent OEM manufacturer justified by one cross-reference chart equivalent, as long as the size, shape, and material are the same as the original P/N. The capacity, core thickness, etc., cannot be changed even if allowed under the above. The competitor is responsible for providing this documentation of the cross-reference P/N."
wordingSRF rain/brake light now requires Super Bright LEDs Inc. P/N PT-STRB-R24 with specific connector and rain light switch.
As printed in Fastrack
In SRF, GCR section 9.1.8.D.1.W.l, change as follows: "A Super Bright LEDs Inc. rain / brake light comprised of a single standard trailer oval lamp, 2-1/4 inches x 6-1/2 inches, with incandescent or LED illumination, P/N PT-STRB-R24, is required in the original roll hoop mounting location. This rule supersedes GCR section 9.3.32.B.2 effective 1/1/2024 through 12/31/2024. No changes may be made to the original 3-pin connector on the wiring harness. The secondary filament of the brake light assembly shall must be connected to a switch enabling its use as a rain light."
wordingSRF requires Super Bright LEDs P/N PT-STRB-R24 rain/brake light with strobing capability and specific wiring.
As printed in Fastrack
In SRF, GCR section 9.1.8.D.1.W.l, change as follows: "A Super Bright LEDs Inc. P/N PT-STRB-R24 (SCCA Enterprises P/N 180427A) rain / brake light, P/N PT-STRB-R24, is required in the original roll hoop mounting location. This rule supersedes GCR section 9.3.32.B.2 effective 1/1/2024 through 12/31/2024. No changes may be made to the original 3-pin connector on the wiring harness. An SCCA Enterprises P/N 1190503 Strobing Brake Light Pigtail is required. The secondary filament of the brake light assembly must be connected to a switch enabling its use as a strobing rain light. A Strobing Brake Light Kit P/N 1168003 is available, which includes the brake light and pigtail."
fasterT2 BMW M2 CS Cup drops 50 lbs to 3550; M235iR drops 50 lbs to 3300.
As printed in Fastrack
In T2 Spec Lines, BMW M2 CS Cup (2020-), change weight as follows: "3600 3550" In T2 Spec Lines, BMW M235iR (-2016), change weight as follows: "3350 3300"
Applies to BMW M2 CSR on this page: Aaron Kaplan, James Keown, Judson Holt, Russell King, Steven Greenhill
fasterT2 Spec Corvette minimum weight drops 175 lbs to 3200, tire rules tighten to Nankang NS-2R only.
As printed in Fastrack
In T2 Spec Lines, Spec Corvette, change as follows: Weight: "3375 3200" Notes: "Cars must comply with all Spec Corvette rules dated 3-1-2 1 11-28-22 including fuel and tires. No tire treatment or rubber softeners are permitted. T2 requirements of 3.75” min ride height and 53mm flat plate restrictor required. Any 295 DOT tire approved with +200lb. Limited to 380 HP. Nankang NS-2R Tires conforming to Spec Corvette rules are required."
slowerT2 Ford Mustang GT 5.0L three generations gain 50-75 lbs minimum weight; restrictors increase to 58-60mm.
As printed in Fastrack
In T2 Spec Lines, Ford Mustang GT 5.0L (11-14), change as follows: Min weight: "3500 3575" Notes: "58mm 60mm flat plate restrictor required." In T2 Spec Lines, Ford Mustang GT 5.0L (15-17), change as follows: Min Weight: "3600 3650" Notes: "58mm 59mm flat plate restrictor required." In T2 Spec Lines, Ford Mustang GT5.0L(2018-), change as follows: Min Weight: "3600 3650"
otherSRF adds brake duct and pedal extension rules, rear shift cable clamp option, camber limit to 5.0°, radiator opening height 3.5" ±0.5", and P2 engine restrictor changes.
As printed in Fastrack
In SRF, GCR section 9.1.8.D.1.H, add the following: "NO MODIFICATIONS ALLOWED. Front brake ducts are required, attached to the openings in the lower radiator baffles, any flexible 4" duct material allowed, installed length minimum 12" maximum 36" in length. Must be securely fastened, Bracket Part # P/N 800368 can be used. Shall Must serve no other purpose. An extension may be welded to the side of the throttle pedal to improve heel-and-toe braking. Master cylinder casting / location must be used as delivered on P/N 180110 Pedal Mounting support. Aeroquip style -3 braided stainless flex lines only, must attach to all brake components without modification. Brake pad "anti-rattle" clips must be removed." In SRF, GCR section 9.1.8.D.1.V, add the following:
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"ii. Rear SADEV shift cable aluminum two-piece style clamp may be used. The P/N WM302007A clamp must serve no other purpose." In SRF, GCR section 9.1.8.D.1.X.k, add the following: "Negative camber shall must not exceed 5.0 degrees absolute maximum front and rear." In SRF, GCR section 9.1.8.D.1.AA.b, add the following: "2. Height of the radiator opening vertical surface 3 1/2“ +/- 1/2"." P2 Engine Table B.1 2008 and older Stock Suzuki, Yamaha, Honda, BMW 38.5mm P2 Engine Table B.2 Not required P2 Engine Table B.3 38.5mm Modified Engine 950 lbs. 1005cc max P2 Engine Table B.1 2008 and older 37mm P2 Engine Table B.2 Not required P2 Engine Table B.3 39mm Stock Engine 1050 lbs.
otherT2 Chevrolet Camaro SS, 1LE, Corvette C5/C6, Z06, and Pontiac Firebird, Solstice GXP now allow four or six piston front calipers.
As printed in Fastrack
In T2 Spec Lines, add to Notes the following: Chevrolet Camaro SS (98-02): “Four or six piston front calipers allowed.” Chevrolet Camaro, 1LE (2016-): “Four or six piston front calipers allowed.” Chevrolet Corvette C-5 Incl. Fxd Cpe (98-04) Z06 (hardtop) (01-04): “Four or six piston front calipers allowed.” Chevrolet Corvette C6 Coupe / Grand Sport (05-13): “Four or six piston front calipers allowed.” Chevrolet Corvette Z06 (06-12): “Four or six piston front calipers allowed.” Pontiac Firebird (98-02): “Four or six piston front calipers allowed.” Pontiac Solstice GXP Coupe/Convertible (07-09): “Four or six piston front calipers allowed.”
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."
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."
In T2 Spec Lines, Cadillac CT4-V Blackwing(2022-), change Notes as follows: "THIS CAR DOES NOT QUALIFY FOR SCCA RUNOFFS COMPETITION UNTIL IT HAS BEENREPRESENTED IN 3 SCCA SUPER TOUR EVENTS."
Applies to Cadillac CT4 Blackwing on this page: John Heinricy
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)
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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)
cars addedChevrolet Camaro, Pontiac Firebird 70-81 Full Prep classified AS at 3400-3600 lbs with 250 lb weight reduction.
As printed in Fastrack
In AS Spec Lines, classify Chevrolet Camaro, Pontiac Firebird (70-81) Full Prep as follows: AS Wheelbase Gear Ratios Std. (or Alt.) Brakes (Max) (in/mm) Weight (lbs) Notes:
A specification table follows in the original; it is not shown here.
Applies to Chevrolet Camaro Z-28 on this page: Phillip Waters
wordingAS class: multiple cars gain fuel cell placement note allowing 24 inches from standard tank, unrestricted filler location.
As printed in Fastrack
In AS Spec Lines, add to Notes as follows: Cadillac CTS-V (04-07): “Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel cell.” Chevrolet/Pontiac Camaro & Firebird (93-02): “Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel cell.” Chevrolet/Pontiac Camaro & Firebird (93-02): “Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with
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installation of a safety fuel cell.” Chevrolet Camaro SS (V8) (10-15): “Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel cell.” Chevrolet Camaro (10-15): “Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel cell.” Dodge Challenger (08-20): “Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel cell.” Ford Mustang GT (05-14): “Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel cell.” Ford Mustang Coupe GT (05-14): “Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel cell.” Ford Mustang GT 5.0l (15-17): “Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel cell.” Ford Mustang GT (05-14): “Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel cell.”
cars addedChevrolet Camaro 16- Full Prep classified into AS at 3400 lbs with 250 lb weight reduction.
As printed in Fastrack
In AS Spec Lines, classify Chevrolet Camaro (16-) Full Prep as follows: AS Wheelbase Gear Ratios Std. (or Alt.) Brakes (Max) (in/mm) Weight (lbs) Notes:
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Chevrolet Camaro (16-) Full Prep 110.6 3.42, 2.28,
A specification table follows in the original; it is not shown here.
Applies to Chevrolet Camaro Z-28 on this page: Phillip Waters
cars addedAS adds Ford Mustang GT 05-14 Restricted prep Engine with 62mm FPR, 3400 lbs minimum, 18-inch wheels.
As printed in Fastrack
In AS Spec Lines, classify Ford Mustang GT (05-14) with Restricted prep Engine as follows: AS Wheelbase Gear Ratios Std.
A specification table follows in the original; it is not shown here.
Applies to Ford Mustang on this page: Michael Kamalian, Thomas J Ellis, Gregory Eaton, James Jost
Atlanta Region Hoosier SCCA Super Tour @ Michelin Raceway Road Atlanta → Atlanta Region SCCA Hoosier Super Tour @ Michelin Raceway Road Atlanta 2024-03-08 to 2025-03-07
slowerT2 Porsche Cayman S 06-09 allows StopTech ST60/ST40 brake kit with 50 lb penalty.
As printed in Fastrack
In T2 Spec Lines, Porsche Cayman S (06-09), add to Notes the following: "The following brake kit is allowed in its entirety with a 50 lb penalty- (f) StopTech ST60 (83.788.6700), rotor size 355X32 (r) StopTech ST40 (83.799.0046), rotor size 332X32."
Applies to Porsche Cayman on this page: Raphael Assuncao
fasterAS Cadillac CTS-V, Chevrolet Camaro SS, Dodge Challenger, Ford Mustang GT, Pontiac GTO allowed 11" wheels until 3/1/25.
As printed in Fastrack
In AS Spec Lines, Cadillac CTS-V (04-07), add to Notes the following: "11" wide wheels can be used until 3/1/25." In AS Spec Lines, Chevrolet Camaro SS (V8) (10-15), add to Notes the following: "11" wide wheels can be used until 3/1/25." In AS Spec Lines, Dodge Challenger (08-20), add to Notes the following: "11" wide wheels can be used until 3/1/25." In AS Spec Lines, Ford Mustang GT 5.0l (15-17), add to Notes the following: "11" wide wheels can be used until 3/1/25."
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In AS Spec Lines, Pontiac GTO (04-06), add to Notes the following: "11" wide wheels can be used until 3/1/25."
Applies to Chevrolet Camaro Z-28 on this page: Phillip Waters
Applies to Ford Mustang on this page: Michael Kamalian, Thomas J Ellis, Gregory Eaton, James Jost
cars addedAS Chevrolet Camaro 1LE (2016-) classified with 3600 lbs minimum weight, 60mm restrictor, 275 tires.
As printed in Fastrack
In AS Spec Lines, classify Chevrolet Camaro 1LE (2016-) as follows: AS Wheelbase Gear Ratios Std. (or Alt.) Brakes (Max) (in/mm) Weight (lbs.) Notes: Chevrolet Camaro, 1LE
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(2016-) 110.6 2.66,1.78,1.30,0.74,.5 (F)
A specification table follows in the original; it is not shown here.
T2 Allow T4 and T3 RX8 to Disable/Remove Factory Oil Inj.
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."
otherAS Chevrolet Camaro, Firebird, and Ford Mustang models permitted to use Flo Tek cylinder heads.
As printed in Fastrack
In AS Spec Lines, Chevrolet/Pontiac Camaro & Firebird (82-92), add to Notes the following: "Flo Tek Head part #102-500 are permitted." In AS Spec Lines, Chevrolet/Pontiac Camaro & Firebird (93-02), add to Notes the following: "Flo Tek Head part #102-500 are permitted." In AS Spec Lines, Chevrolet Camaro (10-15), add to Notes the following: "Flo Tek Head part #102-500 are permitted." In AS Spec Lines, Ford Mustang Incl. Cobra & Cobra R (79-93) and Mercury Capri (79-86), add to Notes the following: "Flo Tek Part # 203-500 are permitted."
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In AS Spec Lines, Ford Mustang Including Cobra 94-04, add to Notes the following: "Flo Tek Part # 203-500 are permitted." In AS Spec Lines, Ford Mustang GT (05-14), add to Notes the following: "Flo Tek Part # 203-500 are permitted."
Applies to Chevrolet Camaro Z-28 on this page: Phillip Waters
Applies to Ford Mustang on this page: Michael Kamalian, Thomas J Ellis, Gregory Eaton, James Jost
T2 Competition Adjustment Request/Wheel Size of E46
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."
AS Request for Classification of 2018-2023 mustang In
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: Michael Kamalian
slowerT2 Ford Mustang S550 5.0 Gen2/Gen3 gains 100 lbs with stock or Brembo 355mm brakes.
As printed in Fastrack
In T2 Spec Lines, Ford Mustang Ecoboost 2.3 (2015-), add to Notes the following: "100LB for Mustang S550 2015-17 5.0 Gen2 and 2018-23 5.0. Gen3 reduce weight by 100Lb when using 4 piston stock or Brembo brakes with 355mm rotors."
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."
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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: Michael Kamalian
T2 request for allowance of 6 piston calipers for T2 C5 corvettes
fasterT2 Corvette C5, Camaro SS, Firebird, Solstice GXP, C6 allow four or six piston front calipers.
As printed in Fastrack
In T2 Spec Lines, add to Notes the following: Chevrolet Camaro SS (98-02): Four or six piston front calipers allowed. Chevrolet Camaro, 1LE (2016-): Four or six piston front calipers allowed. Chevrolet Corvette C-5 Incl. Fxd Cpe (98-04) Z06 (hardtop) (01-04): Four or six piston front calipers allowed. Chevrolet Corvette C6 Coupe / Grand Sport (05-13): Four or six piston front calipers allowed. Chevrolet Corvette Z06 (06-12): Four or six piston front calipers allowed. Pontiac Firebird (98-02): Four or six piston front calipers allowed. Pontiac Solstice GXP Coupe/Convertible (07-09): Four or six piston front calipers allowed.
unclearT2 Corvette C6 LS2 restrictor increases to 63mm; Camaro 1LE weight drops to 3500 lbs, restrictor tightens to 58mm FRP.
As printed in Fastrack
In T2 Spec Lines, Chevrolet Corvette C6 Coupe / Grand Sport (05-13), change Required Restrictor as follows: "LS2: "53 63mm flat plate restrictor" In T2 Spec Lines, Chevrolet Camaro, 1LE (2016-), change as follows: Min Weight: "3575 3500" Required Restrictor: "60mm FRP 58mm flat plate restrictor"
wordingT2 Subaru Impreza WRX STi (03-07) and (08-11) expiration notes removed.
As printed in Fastrack
In T2 Spec Lines, Subaru Impreza WRX STi (03-07), change Notes as follows: "**This Spec line will expire 12/31/24, Please submit to appeal**" In T2 Spec Lines, Subaru Impreza WRX STi (08-11), change Notes as follows: "**This Spec line will expire 12/31/24, Please submit to appeal**"
SRF3 Update Rain Tire Rule and Hoosier Decal Placement
slowerSRF wet tires: P185/60R13 H20/W2 option removed; P185/65R13 W2 front now required with P205/60R13 W2 rear.
As printed in Fastrack
In SRF, GCR section 9.1.8.D.1.X.f, change as follows: "Wet: Front – Hoosier P/N 46100 P185/60R13 H20 or W2 Rear – Hoosier P/N 46105 P205/60R13 H20 or W2 Ground clearance is 2.5” with driver as raced when P185/60R13 (H20 or W2) tires are used. OR Front – Hoosier P/N 46101 P185/65R13 W2 Rear – Hoosier P/N 46105 P205/60R13 W2
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1. It is forbidden to regroove tires. 2. The use of tire warmers or cooling methods other than natural air convection or conduction is prohibited. The penalty for violation will be the loss of qualifying times and/or the disqualification of race results. 3. Hoosier SRF/SRF3 Decal Placement: Four (4) "Hoosier" decals are required in the following locations: Two (2) 11" X 3" decals on the vertical plane of the front nose to the outside of the cooling opening on each side and two (2) 18" X 5" decals, one on each side of the engine cover or above the rear wheel openings on the vertical plane. Hoosier decals are available, free of charge, from all Hoosier tire distributors including SCCA Enterprises."
fasterT2 Ford Mustang 5.0L gets 100 lb weight reduction with 4-piston Brembo brakes and 355mm rotors; EcoBoost brake note removed.
As printed in Fastrack
In T2 Spec Lines, Ford Mustang GT 5.0L (15-17), add to Notes as follows: "Mustang S550 2015-17 5.0 Gen2 and 2018-23 5.0. Gen3 reduce weight by 100Lb when using 4 piston stock or Brembo brakes with 355mm rotors." In T2 Spec Lines, Ford Mustang GT 5.0L (18 -), add to Notes as follows: "Mustang S550 2015-17 5.0 Gen2 and 2018-23 5.0. Gen3 reduce weight by 100Lb when using 4 piston stock or Brembo brakes with 355mm rotors." In T2 Spec Lines, Ford Mustang Ecoboost 2.3 (2015-), change Notes as follows: "Reduce weight by 100Lb when using either stock 355mm 4 piston brakes or m2300s 355mm 4 piston Ford brake kit."
Applies to Ford Mustang on this page: Michael Kamalian
SRF3 Update to Letter 36619 with new Hoosier Contingency Decal Info
wordingSRF Hoosier decal requirement reduced from four decals in specific locations to three decals with simpler placement rules.
As printed in Fastrack
In SRF, GCR section 9.1.8.D.1.X.f.3, change as follows: "Four (4) "Hoosier" decals are required in the following locations: Two (2) 11" X 3" decals on the vertical plane of the front nose to the outside of the cooling opening on each side and two (2) 18" X 5" decals, one on each side of the engine cover or above the rear wheel openings on the vertical plane. Hoosier decals are available, free of charge, from all Hoosier tire distributors including SCCA Enterprises Per Hoosier's contingency program, three (3) decals are required to qualify for contingency awards. One (1) decal must be located on each side of the car and one (1) decal must be visible on the front."
unclearAS Ford Mustang GT models gain alternate transmission ratio options for 2024-09-01.
As printed in Fastrack
In AS Spec Lines, Ford Mustang GT (05-14) with Restricted Prep Engine, add to Notes as follows: "Alternate transmission Ratios 3.66, 2.43, 1.69, 1.32, 1.00, .68.” In AS Spec Lines, Ford Mustang GT 5.0L (2018-), add to Notes as follows: "Alternate transmission Ratios 3.24, 2.10, 1.42, 1.00, 0.81, .062."
Applies to Ford Mustang on this page: Michael Kamalian, Thomas J Ellis, Gregory Eaton, James Jost
slowerSRF brake rotor minimum thickness increases from 12.20mm to 13.25mm, Wilwood vented rotor P/N 800065.
As printed in Fastrack
In SRF, GCR section 9.1.8.D.1.X.g, change as follows: "Brakes: Hawk Blue 9012 pads P/N 801993 must be used. Wilwood vented rotor P/N 800065 shall must be used as delivered with no machining of any kind. Minimum thickness 12.20mm (0.481”) 13.25mm (0.522”)."
wordingSRF3 Hoosier logo placement changes from four decals to three decals in different locations.
As printed in Fastrack
In SRF, GCR section 9.1.8.D.2.B, change as follows: "Mandatory identification: "SRF3" near the side car numbers. "Hoosier" logo (4) on both sides front lower outer corners of the nose and each side of the tail. Three (3) "Hoosier" logos, one (1) on each side of the car and one (1) on the center front of the car."
tyres & wheelsT2 Spec Corvette now allows 295 R compound DOT tires as alternative to Nankang NS-2R.
As printed in Fastrack
In T2 Spec Lines, Spec Corvette, change Notes as follows: "Cars must comply with all Spec Corvette rules dated 11-28-22 including fuel and tires. No tire treatment or rubber softeners are permitted. Limited to 380 HP. Nankang NS-2R Tires conforming to Spec Corvette rules are required or a 295 R compound DOT tire."
T2 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."
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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."
T2 Request Less Restriction for Ls-3 Engined C6 Corvette
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
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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."
fasterT2 Chevrolet Corvette C6 Coupe/Grand Sport wheels widened to 18×11 or 19×13.
As printed in Fastrack
In T2 Spec Lines, Chevrolet Corvette C6 Coupe / Grand Sport (05-13), change Max Wheel Size as follows: "18 x 10 11 (F) 19 x 11 (R) or 18 x 11 (F) 19 x 13 (R)"
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."
T2 Classification for a 2005 Cadillac CTS 3.6 liter 6 speed manual
fasterAS Ford Mustang Coyote engines increase restrictor to 80mm from 64mm or 67mm.
As printed in Fastrack
In AS Spec Lines, add to Notes as follows: Ford mustang (GT 05-14): "Gen 1- 67mm Gen 2-64mm" Ford mustang (GT 05-14): "Gen 1- 67mm" Ford mustang (GT 15-17): "Gen 1- 67mm" Ford mustang (GT 94-04): "Gen 1- 67mm Gen 2-64mm" Ford mustang cobra & Cobra R Mercury Capri (79-93) (79-86): "Gen 1- 67mm Gen 2-64mm"
fasterAS Mustang GT 05-14 4.6L loses 300 lbs; 15-17 and 2018+ models lose 61mm and 60mm restrictors respectively.
As printed in Fastrack
In AS Spec Lines, Ford Mustang Coupe GT (05-14) Restricted Prep., change Notes as follows: "The 4.6L engine assembly has a weight reduction of 300 lbs. 5.0L/6spd engine/trans: track pack front and rear spoiler allowed." In AS Spec Lines, Ford Mustang Coupe GT (05-14) with Restricted Prep. engine, change Notes as follows: "Max. Wheel Size: Dia.18.0 inches. Stock brakes or alternate Ford 14” Brembo Brake (Ford Racing Kit #M-2300-S) and full prep brake package may be used. Either engine may be used. 1st Generation 5.0l Coyote 11-14 62mm FPR 2nd Generation 5.0l Coyote 15-17 61mm FPR Cold Air Intake allowed Charge Motion Control Valves can be blocked off and removed for firewall clearance Allow Cold Air Intake Tremec Magnum transmission may be used P/N- TUKT16901. Full Prep Transmissions rule package may also be used. Max compression ratio, 11.2:1 track pack front and rear spoiler allowed. Alternate transmission
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Ratios 3.66, 2.43, 1.69, 1.32, 1.00, .68." In AS Spec Lines, Ford Mustang GT 5.0l (15-17) Restricted Preparation, change Notes as follows: "Max. Wheel Size: Dia. 18.0 inches. Stock brakes or alternate Ford Brembo Brake caliper (Ford Racing Kit #M-2300-S) may be used. 61mm flat plate restrictor required. Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel cell. 11” wide wheels can be used until 3/1/25. Performance pack front and rear spoiler, body kit allowed." In AS Spec Lines, Ford Mustang GT 5.0L (2018-), change Notes as follows: "Package Brembo front BBK and 380mm rotors permitted (Ford PN M-2300-V) at no weight penalty. 60mm flat plate restrictor required. 2014 Mustang GT exhaust manifolds permitted. Ford Racing oil pan #M-6675-M50BR permitted. Alternate transmission Ratios 3.24, 2.10, 1.42, 1.00, 0.81, .062. Performance pack front and rear spoiler, body kit allowed."
Applies to Ford Mustang on this page: Michael Kamalian, Thomas J Ellis, Gregory Eaton, James Jost
wordingAS class gear ratio options specified for multiple American muscle cars, including Cadillac CTS-V, Chevrolet Camaro, Ford Mustang, Dodge Challenger, and Pontiac GTO.
As printed in Fastrack
In AS Spec Lines, change Gear Ratios as follows: Cadillac CTS-V (04-07): "2.97, 2.07, 1.43,1.00, 0.84,0.56 or 3.01, 2.07, 1.43, 1.0, .84, .57 or 2.20, 1.64,1.28,1.00 or 2.88, 1.91, 1.33, 1.00" Chevrolet Camaro, Pontiac Firebird (70-81), Full Prep: "3.42, 2.28, 1.45, 1.00 or 2.95, 1.94, 1.34, 1.00, 0.73 or 3.35, 1.93, 1.29, 1.00, 0.61, or 2.20, 1.64,1.28,1.00 or 2.87,1.89,1.28,1.00" Chevrolet Camaro, Pontiac Firebird (70-81), Restricted Prep.: "3.42, 2.28, 1.45, 1.00 or 2.95, 1.94, 1.34, 1.00, 0.73 or 3.35, 1.93, 1.29, 1.00, 0.61, or 2.20, 1.64,1.28,1.00 or 2.87,1.89,1.28,1.00" Chevrolet/Pontiac Camaro & Firebird (82-92) Full Prep:
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"3.42, 2.28, 1.45, 1.00 or 2.95, 1.94, 1.34, 1.00, 0.73 or 3.35, 1.93, 1.29, 1.00, 0.61 or 2.20, 1.64,1.28,1.00 or 2.88, 1.91, 1.33, 1.00" Chevrolet/Pontiac Camaro & Firebird (93-02) Full Prep: "3.42, 2.28, 1.45,1.00 or 2.95, 1.94,1.34, 1.00,0.73or 3.35, 1.93,1.29, 1.00,0. 61 or 2.88, 1.91, 1.33, 1.00 or 3.27, 1.98, 1.34, 1.00, 0.68 or 2.20,1.64,1.28,1.00 or 2.87,1.89,1.28,1.00,.81" Chevrolet/Pontiac Camaro & Firebird (93-02) Restricted prep: "2.97, 2.07, 1.43, 1.00, 0.80, 0.62 or 3.36, 2.07, 1.35, 1.00, .80, .62 or 2.66, 1.78, 1.30, 1.00, 0.74, 0.50 or 2.88, 1.91, 1.33, 1.00 or 2.20, 1.64,1.28,1.00" Chevrolet Camaro SS (V8) (10-15) Restricted Prep: "3.01, 2.07, 1.43, 1.0, .84, .57 or 2.88, 1.91, 1.33, 1.00 or 2.20, 1.64,1.28,1.00" Chevrolet Camaro (10-15) Full Prep: "3.42, 2.28, 1.45,1.00 or 2.95, 1.94,1.34, 1.00, 0.73or 3.35, 1.93,1.29, 1.00,0. 61 or 2.88, 1.91, 1.33, 1.00 or 3.27, 1.98, 1.34, 1.00, 0.68 or 2.20, 1.64,1.28,1.00 or 2.87,1.89,1.28,1.00,.81" Chevrolet Camaro (16-) Full Prep: "3.42, 2.28, 1.45,1.00 or 2.95, 1.94,1.34, 1.00, 0.73or 3.35, 1.93,1.29, 1.00,0. 61 or 2.88, 1.91, 1.33, 1.00 or 3.27, 1.98, 1.34, 1.00, 0.68 or 2.20, 1.64,1.28,1.00 or 2.87,1.89,1.28,1.00,.81" Chevrolet Camaro, 1LE (16-): "2.66,1.78,1.30, 0.74,.50 or 2.88, 1.91, 1.33, 1.00 or 2.20, 1.64,1.28,1.00 or 2.88, 1.91, 1.33, 1.00 or 2.20, 1.64,1.28,1.00" Dodge Challenger (08-20) Restricted Preparation 5.7L, 6.1L, or 6.4L V8 (Iron block, Aluminum heads), 2 valves/cylinder: "2.97, 2.1, 1.46, 1.00, 0.74, 0.50 or 2.26, 1.58, 1.19, 1.00, 0.77, 0.63 or 2.88, 1.91, 1.33, 1.00 or 2.20, 1.64,1.28,1.00" Ford Mustang Incl. Cobra & Cobra R (79-93) and Mercury Capri (79-86) Full Prep: "3.07, 1.72, 1.00, 0.70 or 2.95, 1.94, 1.34, 1.00, 0.63 or 3.35, 1.99, 1.33, 1.00, 0.68 or 2.87 1.89 1.28 1.00 0.81" Ford Mustang Incl. Cobra & Cobra R (79-93) and Mercury Capri (79-86) with Restricted Prep Engine: "2.95, 1.94, 1.34,1.00, 0.63 or 3.35,1.99,1.33, 1.00, 0.69 or 2.88, 1.91, 1.33, 1.00 or 3.27,1.98, 1.34, 1.00, 0.68, 3.66, 2.43, 1.69, 1.32, 1.00, .68. or 2.87,1.89,1.28,1.00,.81" Ford Mustang Including Cobra 94-04 Full Prep: "3.07, 1.72, 1.00, 0.70 or 2.95, 1.94, 1.34, 1.00, 0.63 or 3.35, 1.99, 1.33, 1.00, 0.68 or 2.88, 1.91, 1.33, 1.00 or 3.27, 1.98, 1.34, 1.00, 0.68 or 2.88, 1.91, 1.33, 1.00 or 3.27, 1.98, 1.34, 1.00, 0.68 or 2.20, 1.64,1.28,1.00 or 2.87 1.89 1.28 1.00 0.81" Ford Mustang Cobra and GT 94-95 (Restricted Prep): "3.35, 1.99, 1.33, 1.00, 0.68 or 2.88, 1.91, 1.33, 1.00 or 2.20, 1.64,1.28,1.00" Ford Mustang including Cobra 96-04 (Restricted Prep) 4.6L two and four valve motor: "3.35, 1.99, 1.33, 1.00, 0.68 or 3.27, 1.98, 1.34, 1.00, 0.67 or 3.37, 1.99, 1.33, 1.00, 0.68 or 3.38, 2.00, 1.32, 1.00, 0.68 or 2.88, 1.91, 1.33, 1.00 or 2.20, 1.64,1.28,1.00" Ford Mustang GT (05-14) Full Prep: "3.38, 2.00, 1.32, 1.00, 0.68 or 3.66, 2.43, 1.69,1.32, 1.00, 0.65 or 2.88, 1.91, 1.33, 1.00 or 2.20, 1.64,1.28,1.00" Ford Mustang GT 5.0l (15-17) Restricted Preparation: "3.66, 2.43, 1.69,1.32, 1.00, .65 or 4.69, 2.98,2.14, 1.76,1.52, 1.27,1.00, 0.85, 0.68, 0.63, or 3.24, 2.10, 1.42, 1.00, 0.81, .062. or 2.88, 1.91, 1.33, 1.00 or 2.20, 1.64,1.28,1.00" Ford Mustang GT 5.0L (2018-) Restricted Preparation: "2.97, 2.07, 1.43, 1.00, 0.84, 0.57 or 2.88, 1.91, 1.33, 1.00 or 2.20, 1.64,1.28,1.00" Pontiac GTO (04-06) Restricted Prep. "2.97, 2.07, 1.43, 1.00, 0.84, 0.57 or 2.88, 1.91, 1.33, 1.00 or 2.20, 1.64,1.28,1.00"
In AS SPEC LINES, Cadillac CTS-V (04-07) Restricted Prep., change Notes as follows: "Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel cell. Tremec TR6060 Transmission with 3.0 1, 2.07, 1.43, 1.0, .84, .57 ratios permitted. 11” wide wheels can be used until 3/1/25. Any ECM may be used." In AS SPEC LINES, Chevrolet Camaro, Pontiac Firebird (70-81) Restricted Prep ., add to Notes as follows: "Any ECM may be used." In AS SPEC LINES, Chevrolet/Pontiac Camaro & Firebird (82-92) 5.7L V-8 LS1, add to Notes as follows:
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"Any ECM may be used." In AS SPEC LINES, Chevrolet/Pontiac Camaro & Firebird (93-02) Restricted Prep.5.7L V-8 LT1, add to Notes as follows: "Any ECM may be used." In AS SPEC LINES, Chevrolet/Pontiac Camaro & Firebird (93-02) Restricted Prep. 5.7L V-8 LT1; 98-02 , change Notes as follows: "5.7L LS1: GM Performance Parts camshaft Kit P/N-19355738 is permitted. Cylinder Bore, 99 mm; Stroke, 92 mm; Intake Valve Diameter, 50.8; Exhaust Valve Diameter, 39.4 mm; Throttle Body Bore, 75 mm; SLP Intake Lid (SLP part number 21044 (98-99) and 21045 (00-02)) is permitted. Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel cell. 1-3/4 headers allowed. For the LS1connecting rods Callies P/NCSC6100DS6A2AH, Scat rods P/N2-1CR6100-944, GM performance rods P/N12649190. Any ECM may be used." In AS SPEC LINES, Chevrolet Camaro SS (V8) (10-15) Restricted Prep., add to Notes as follows: "Any ECM may be used."
Applies to Chevrolet Camaro Z-28 on this page: Phillip Waters
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)
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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-)"
In T2 Spec Lines, Spec Corvette, change as follows: Weight: "SC-3200, SC+-3300* See Notes Section" Notes: "Cars must comply with all Spec Corvette rules dated 11-28-22 including fuel and tires. No tire treatment or rubber softeners are permitted. Limited to 380 HP. Nankang NS-2R Tires conforming to Spec Corvette rules or a 295 R compound DOT tire. Cars must conform to Spec Corvette rules dated 11/2022. Master cylinder part number GM 19418187 and Booster part number 19418516 permitted. Limited to 380 HP. Any 200tw 315 tire permitted if used on all 4 corners or a 295 R compound DOT tire. Modifications to Radiator Air Shroud to increase radiator cooling efficiency is allowed. Replacement of factory air shroud with
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other material is allowed. New air shroud cannot be wider than inside of frame rails. The front bumper must remain in factory shape – unmolested and air shroud must mount to it in factory location. Upper Radiator Support must retain factory location. Factory air dam must remain in its factory location. All factory suspension pick up points must be maintained. Trackspec’s rear upper coilover offset shock mount may be used, part number C56UPRMNT. The following "Spec Corvette +" allowances are permitted with a base weight of 3300 lbs: 1) Penske double adjustable shocks, 2) dry sump, 3) battery relocation, 4) Quaife limited slip differential, 5) T2 4 piston 13" front brake system, 6) coil springs other than Eibach part number 0800.225.0550."
unclearT2 Mustang GT 5.0L combines 2015-17 and 2018-23 with different restrictors: 63mm for Gen 2, 60mm for Gen 3.
As printed in Fastrack
In T2 Spec Lines, combine Ford Mustang GT 5.0L (15-17) and Ford Mustang GT 5.0L (2018-) and change as follows: Delete in its entirety: "Ford Mustang GT 5.0L (15-17)" "Ford Mustang GT 5.0L (2018-)(15-23)" Required Restrictor: 58mm flat plate restrictor 2015-17 5.0 Gen 2 63mm FPR, 2018-23 5.0. Gen 3 60mm FPR" Gear Ratios: "3.66, 2.43, 1.69, 1.32, 1.00, 0.65 or 4.69, 2.98, 2.14, 1.76, 1.52, 1.27, 1.00, 0.85, 0.68, 0.63 or 4.17, 2.34, 1.52, 1.14, 0.87, 0.69" Notes: "Ford Performance Handling Kit part #M-FR3A-M8, Sway Bars in M-FR3A-M8 kit part #M5490-E or M5490-G, Rear Toe Bearing part #M-5A460-M, Ford Performance Radiator part #M-8005-M8,Strut Tower Brace part# M-20201-M, Camber Bolts M-
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3B236-A, Solid Differential Bushings part#M-4425-M, Short Shift Kit part#M- 7210-M8, Solid Subframe Bushings part#M- 5872- M, Dampers in Handling Pack part #M-18000-F, Ford OEM Performance Package Brembo front BBK and 380mm rotors permitted (Ford PN M-2300-V) at no weight penalty. Alternate driveshaft is allowed. Springs up to 800#/in front and rear permitted. Alternate metallic driveshaft permitted. Rear spring relocation to shock permitted with kit TBD. Ford Racing oil pan #M-6675- M50BR permitted. BMR rear upper control arm camber links part #UTCA064 permitted. Track/Performance Package parts permitted. Mustang S550 2015-17 5.0 Gen2 and 2018-23 5.0. Gen3 reduce weight by 100Lb when using 4 piston stock or Brembo brakes with 355mm rotors."
Applies to Ford Mustang on this page: Michael Kamalian
wordingT2 BMW M235iR (-2016) now permits oil cooler, radiator per touring rules, and silicone charge pipe.
As printed in Fastrack
In T2 Spec Lines, BMW M235iR (-2016), add to Notes the following: "Oil cooler and radiator permitted according to touring rules. Silicone charge pipe permitted."
T2 Request to Classify Club Spec in Appropriate Touring Classes
slowerT2 BMW M2 CS Cup requires Red power stick #8324085 instead of Purple #8324089; Corvette C5 Z06 restrictor reduces to 58mm from 59mm.
As printed in Fastrack
In T2 Spec Lines, BMW M2 CS Cup 2020-, change Notes as follows: "Effective 3/1/2025 It is mandatory to run the “Purple” power stick part #8324089"Red" power stick part #8324085." In T2 Spec Lines, Chevrolet Corvette C-5 Incl. Fxd Cpe (98-04) Z06 (hardtop) (01-04), change Required Restrictor as follows: "Effective 3/1/2025 59mm 58mm"
Applies to BMW M2 CSR on this page: Aaron Kaplan, James Keown, Judson Holt, Russell King, Steven Greenhill
Applies to Chevrolet Corvette on this page: William Bolt, James Davidson, Carl Fung
"Any ECM maybe used." Chevrolet Camaro SS (V8) (10-15) Restricted Prep. 6.2L V8 (Aluminum Block, Aluminum Heads), 2 valves per cylinder: "Any ECM maybe used."
Atlanta Region SCCA Hoosier Super Tour @ Michelin Raceway Road Atlanta → Atlanta Region SCCA Hoosier Super Tour @ Michelin Raceway Road Atlanta 2025-03-07 to 2026-03-06
wordingT2 350Z (03-08) removes detailed OEM part numbers and consolidates permitted modifications into simplified allowance list.
As printed in Fastrack
In T2 Spec Lines, Nissan 350Z Track/ Touring/ Standard/ Nismo Spec Z (03-08), change Notes as follows: "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 roll bar #54611-SZ350, Rear roll bar #562300-SZ350, 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. Aftermarket flywheel permitted at minimum 14lbs. Aftermarket headers permitted, cold air intake permitted. Aftermarket big brake kit 4 piston front permitted up to 355x32 SPL pro V3 front upper camber caster control arms for the 350z part# SPLFUAZ33 permitted. SPL rear toe links part# SPL RTA Z33 permitted. Stillen part #400338 permitted. 44011-RC350 rear caliper kit permitted, 43206-SZ350 Right rotor permitted, 43207-SZ350 Left rotor permitted. Must conform to
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all SpecZ 2018 Edition rules. No other touring allowances beyond 2018 SpecZ edition rules or allowances listed here. Track/NISMO/S/R-Tune OEM aero options permitted, KW Motorsports: F&R 5600S-SZ350 permitted, Front sway bar max 37mm, Rear sway bar max 25mm, RRZ30 Oil Pump allowed, Performance alternative front upper control arms permitted, Spherical bearings allowed, Springs up to 700 lbs./in. front/rear permitted, Aftermarket flywheel permitted at minimum 14lbs, Z1 350Z Intake Power Mod Kit permitted, Aftermarket headers permitted, Cold air intake permitted, Stillen part #400338 permitted, Zspeed and Z1 alternative clutch slave permitted, Nissan rear diff cover #99996-35TDK or #383510C021 permitted, Nissan caliper kit: 41001-FR350 and/or 44011-RC350 permitted."
wordingAS class notes cleanup: multiple Camaro, Firebird, CTS-V, Challenger, Mustang specs and fuel cell/ECM/head restrictions removed.
As printed in Fastrack
In AS Spec Lines, change/add to Notes as follows: Cadillac CTS-V (04-07): "Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel cell. Any ECM maybe used. The Drive Shaft Shop, Axle shaft part #'s 510220/510221 permitted." Chevrolet Camaro, Pontiac Firebird (70-81) Full Prep: "Engine built to A/S Build Sheet specifications with the following: Head Casting #s: 14101081, 14014416 Port Volume (Max.): 081 casting: 170.00 cc IN/65.00 EX; 416 Casting 168.00cc IN/60.00 EX with a 250 lb. weight reduction. Edelbrock Cylinder Head Part
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#s 608979, 608879." Chevrolet Camaro, Pontiac Firebird (70-81) Restricted Prep.: "Any ECM maybe used." Chevrolet/Pontiac Camaro & Firebird (82-92) Full Prep.: "Engine built to A/S Build Sheet specifications with the following: Head Casting #s: 14101081, 14014416 Port Volume (Max.): 081 cast¬ing: 170.00 cc IN/65.00 EX; 416 Casting 168.00cc IN/60.00 EX with a 250 lb weight reduction. Edelbrock Cylinder Head Part #s 608979, 608879 are permitted. For regional competition only, unmodified GM Performance cylinder head part #s 19300955, 19300956 may be used with Allstar restrictor plate part# ALL26180 and 1.250 inserts part# ALL26186 installed between intake manifold and insulator. Gaskets may be used (each gasket can be no thicker than .125 inches), one on each side of the restrictor. All intake air must pass through the inserts of the restrictor plate. Alternate gear ratio sets 2.88, 1.91, 1.33, 1.00 or 3.27, 1.98, 1.34, 1.00, 0.68 are permitted. Flo Tek Head part #102-500 are permitted." Chevrolet/Pontiac Camaro & Firebird (82-92) Restricted prep engine: "Any ECM maybe used." Chevrolet/Pontiac Camaro & Firebird (93-02) Full Prep: "Engine built to A/S Build Sheet specifications with the following: Head Casting #’s: 14101081, 14014416; Port Volume (Max.): 081 casting: 170.00 cc IN/65.00 EX; 416 Casting 168.00cc IN/60.00 EX with a 250 lb weight reduction. Edelbrock Cylinder Head Part #’s 608979, 608879 are permitted. For regional competition only, unmodified GM Performance cylinder head part #s 19300955, 19300956 may be used with Allstar restrictor plate part# ALL26180 and 1.250 inserts part# ALL26186 installed between intake manifold and insulator. Gaskets may be used (each gasket can be no thicker than .125 inches), one on each side of the restrictor. All intake air must pass through the inserts of the restrictor plate. Alternate gear ratio sets 2.88, 1.91, 1.33, 1.00 or 3.27, 1.98, 1.34, 1.00, 0.68 are permitted. Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel cell. Flo Tek Head part #102-500 are permitted." Chevrolet/Pontiac Camaro & Firebird (93-02) Restricted Prep: "Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel cell. Any ECM maybe used." Chevrolet Camaro SS (V8) (10-15) Restricted Prep: "Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel cell. Any ECM maybe used." Chevrolet Camaro (10-15) Full Prep: "Engine built to A/S Build Sheet specifications with the following: Head Casting #’s: 14101081, 14014416; Port Volume (Max.): 081 casting: 170.00 cc IN/65.00 EX; 416 Casting 168.00cc IN/60.00 EX with a 200 lb weight reduction. Edelbrock Cylinder Head Part #’s 608979, 608879 are permitted. Alternate gear ratio sets 2.88, 1.91, 1.33, 1.00 or 3.27, 1.98, 1.34, 1.00, 0.68 are permitted. Fuel cells must be located within 24 inches of the standard tank. The 24-inch measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel cell. Flo Tek Head part #102-500 are permitted. Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel cell." Chevrolet Camaro (16-) Full Prep: "Engine built to A/S Build Sheet specifications with the following: Head Casting #’s: 14101081, 14014416; Port Volume (Max.): 081 casting: 170.00 cc IN/65.00 EX; 416 Casting 168.00cc IN/60.00 EX with a 200 lb weight reduction. Edelbrock Cylinder Head Part #’s 608979, 608879 are permitted, Flo Tek Head part #102-500 are permitted." Chevrolet Camaro, 1LE (16-): "60mm flat plate restrictor required. Any ECM maybe used." Dodge Challenger (08-20) Restricted Preparation: "80mm flat plate restrictor is required on the 6.4L engine. Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel cell." Ford Mustang Incl. Cobra & Cobra R (79-93) and Mercury Capri (79-86) Full Prep: "Engine built to A/S Build Sheet specifications with the following: Head Casting #s: F3ZE AA (GT40), F1ZE-AA (GT-40), F77E-AA (GT- 40P), Port Volume (Max.): 143.00cc IN/54.00cc EX (GT-40 & GT-40P) with a 250 lb weight reduction. Edelbrock Cylinder Head Part #s 602579, 602479 are permitted. For regional competition only, unmodified Ford Performance cylinder head part #s M-6049-Z304DA7, M-6049-Z304D may be used with Allstar restrictor plate part# ALL26180 and 1.250 inserts part# ALL26186 installed between intake manifold and insulator. Gaskets may be used (each gasket can be no thicker than .125 inches), one on each side of the restrictor. All intake air must pass through the inserts of the restrictor plate. Alternate gear ratio sets 2.88, 1.91, 1.33, 1.00 or 3.27, 1.98, 1.34, 1.00, 0.68 are permitted. Flo Tek Part # 203-500 are permitted." Ford Mustang Incl. Cobra & Cobra R (79-93) and Mercury Capri(79-86) with Restricted Prep Engine: "62mm flat plate restrictor is required. Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel cell. MMR Secondary Timing Chain Tensioner Bracket #467893 is permitted." Ford Mustang Including Cobra 94-04 Full Prep: "Engine built to A/S Build Sheet specifications with the following: Head Casting #s: F3ZE AA (GT40), F1ZE-AA (GT-40), F77E-AA (GT- 40P), Port Volume (Max.): 143.00cc IN/54.00cc EX (GT-40 & GT-40P) with a 250 lb weight reduction. Edelbrock Cylinder Head Part #s 602579, 602479 are permitted. For regional competition only, unmodified Ford Performance cylinder head part #s M-6049-Z304DA7, M-6049-Z304D may be used with Allstar restrictor plate part# ALL26180 and 1.250 inserts part# ALL26186 installed between intake manifold and insulator. Gaskets may be used (each gasket can be no thicker than .125 inches), one on each side of the restrictor. All intake air must pass through the inserts of the restrictor plate. Alternate gear ratio sets 2.88, 1.91, 1.33, 1.00 or 3.27, 1.98, 1.34, 1.00, 0.68 are permitted. Flo Tek Part # 203-500 are permitted." Ford Mustang GT (94-04) with Restricted Prep Engine: "MMR Secondary Timing Chain Tensioner Bracket #467893 is permitted." Ford Mustang Cobra and GT 94-95(Restricted Prep): "1st Generation 5.0l Coyote 11-14 62mm FPR 2nd Generation 5.0l Coyote 15-17 61mm FPR Alternate transmission Ratios 3.66, 2.43, 1.69, 1.32, 1.00, .68. MMR Secondary Timing Chain Tensioner Bracket #467893 is permitted." Ford Mustang including Cobra 96-04 (Restricted Prep): "1st Generation 5.0l Coyote 11-14 62mm FPR 2nd Generation 5.0l Coyote 15-17 61mm FPR Alternate transmission Ratios 3.66, 2.43, 1.69, 1.32, 1.00, .68. MMR Secondary Timing Chain Tensioner Bracket #467893 is permitted." Ford Mustang Coupe GT (05-14) Restricted Prep.: "1st Generation 5.0l Coyote 11-14 62mm FPR 2nd Generation 5.0l Coyote 15-17 61mm FPR Alternate transmission Ratios 3.66, 2.43, 1.69, 1.32, 1.00, .68. MMR Secondary Timing Chain Tensioner Bracket #467893 is permitted. MT82 6 speed is permitted." Ford Mustang GT (05-14) with Restricted Prep Engine: "1st Generation 5.0l Coyote 11-14 62mm FPR 2nd Generation 5.0l Coyote 15-17 61mm FPR Alternate transmission Ratios 3.66, 2.43, 1.69, 1.32, 1.00, .68. MMR Secondary Timing Chain Tensioner Bracket #467893 is permitted. MT82 6 speed is permitted." Ford Mustang GT 5.0l (15-17) Restricted Preparation: "61mm flat plate restrictor required. Fuel cells must be located within 24 inches of the standard tank. The 24 inch measurement is taken from the perimeter of the stock and alternative fuel cell. Fuel filler location is unrestricted with installation of a safety fuel cell. MMR Secondary Timing Chain Tensioner Bracket #467893 is permitted." Ford Mustang GT 5.0L (2018-): "60mm flat plate restrictor required. MMR Secondary Timing Chain Tensioner Bracket #467893 is permitted."
wordingFE2 allows driver safety and comfort modifications for disabled drivers with SCCA approval, not transferable to other drivers.
As printed in Fastrack
In FE2, GCR section 9.1.1.G.2.E, add the following: "g. Driver Safety and Comfort modifications to seat and controls for drivers with disabilities may be made only by approval. These modifications must be reported to SCCA Enterprises and noted in the car logbook. The modifications are approved only for the noted driver with disabilities. If the car is used by or sold to another driver, it must be returned to the previous standard configuration."
wordingSRF drivers with disabilities may modify seat and controls for safety and comfort with approval and logbook notation.
As printed in Fastrack
In SRF, GCR section 9.1.8.D.1.D, add the following: "f. Driver Safety and Comfort modifications to seat and controls for drivers with disabilities may be made only by approval. These modifications must be reported to SCCA Enterprises and noted in the car logbook. The modifications are approved only for the noted driver with disabilities. If the car is used by or sold to another driver, it must be returned to the previous standard configuration."
wordingAS LS1/LS6 5.3L truck engine gains four approved intake part numbers: 12561269, 88894095, 89017363, 89017364.
As printed in Fastrack
In GCR, Section 9.1.6.F., add the following to Intake Part #’s: "17113697, 19418185, 89017230, 89017363, 89017364, and 89017365, 12561269 and 88894095"
unclearBMW M2 CS Cup 2020 must run Red power stick part #8324085, not Purple #8324089.
As printed in Fastrack
The BMW M2 CS Clubsport is classed in T1, not T2. Please visit the following web address for vehicle details about the car's base allowances- https://www.bmwusa.com/motorsport/bmw-m2- cs.html#:~:text=The%20BMW%20M2%20CS%20Racing%20models%20are%20powered%20by%20a,M2%20CS%20Racing%20Rec ommended%20Mileage. In T2 Spec Lines, BMW M2 CS Cup 2020, change as follows: Model: "BMW M2 CS Cup 2020-2021" Notes: "DOT approved tires required. All other components must be as homologated from BMW Motorsports. No other changes
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or Touring rule allowances permitted unless noted below. It is permitted to remove door glass and mechanism. It is mandatory to run the “Purple” power stick part #8324089. Effective 3/1/2025 5 It is mandatory to run the “Red” power stick part #8324085. BMW exhaust part # 18302459928 allowed. Hot country package allowed including part numbers: (aKMK LH 17 10 8342846 1, aKMK RH 17 10 8328139 1, 17 10 8328135 1, 17 10 8328136 1, 17 10 8328137 1, 17 10 8328138 1, ISO7380-2 M5X14 10.9 ZNSW 17 10 8436008 2, 17 10 8417424 1.) Hood vents conforming to 9.1.9.2.D.8.a.7 are permitted."
Applies to BMW M2 CSR on this page: Aaron Kaplan, James Keown, Judson Holt, Russell King, Steven Greenhill
slowerT2 Chevrolet Corvette C5 Z06 and C6 brake allowances clarified; stock calipers and rotors only for C5, specific sizes for C6.
As printed in Fastrack
In T2 Spec Lines, change Brakes as follows: Chevrolet Corvette C-5 Incl. Fxd Cpe (98-04) Z06 (hardtop) (01-04): "(F) 325 Vented Disc (R) 305 Vented Disc May use two piece steel rotors with aluminum hats up to 5% larger than 340/330; Any four piston calipers and brackets are permitted. Any brake caliper pistons are allowed; may use the Wilwood SL6R brake caliper. Stock calipers and rotors only (F) 325 (R) 305" Chevrolet Corvette C6 Coupe / Grand Sport (05-13): "(F) 325 / 340 Vented Disc (R) 305 / 330 Vented Disc or (F) 355 x 32 Vented Disc (R) 340 x 26 Vented Disc or May use 2-pc steel rotors with alum. hats up to 5% larger than Z51 rotor. LS2 may use Grand Sport brake package. Any brake caliper pistons allowed. May use any four piston brake caliper and brackets. Z06 brake calipers allowed."
Effective 9/1/25 in SRF, GCR section 9.1.8.D.1.V.ff, add the following: "SRF3 Oil Cooler, P/N G480503 may be used as mounted per the GEN3 Assembly Manual. No fan permitted for SRF. HD Oil Cooler kit P/N G1148500 may be used as mounted per the GEN3 Conversion Manual." Effective 9/1/25 in SRF, GCR section 9.1.8.D.X.g, change as follows: "Brakes: Hawk Blue 9012 pads P/N 801993 must be used. Wilwood vented rotor P/N 800065 must be used as delivered with no machining of any kind. Minimum thickness 13.25mm (0.522”). The Renault Alliance solid front rotors may not be used. Rubber caliper bushings may be replaced with bronze bushings P/N 1196185 or P/N 1196185. Original caliper pistons may be replaced with vented caliper piston P/N 1196184; no other modification allowed. Wilwood caliper with bracket universal fit P/N 800038
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may be used as delivered with no modification of any kind. Wilwood knock back spring (2.63 lbs.) P/N 800045 may be used as delivered with no modification of any kind; maximum of one spring per caliper. 1. Hawk Blue pads P/N 801993 only 2. Wilwood Vented Rotor P/N 800065 only, as delivered, with no machining of any kind. Minimum thickness 13.25mm (0.522") 3. Wilwood universal caliper Kit P/N 1180008 as delivered, caliper only P/N 800038; Wilwood knock back spring P/N 800045 may be used as delivered, with no machining of any kind, and only one spring per caliper 4. Renault caliper rubber bushings may be replaced with bronze bushings P/N 1196185 or P/N 1196185A 5. Renault caliper piston may be replaced with P/N 1196184 vented piston as delivered, with no machining of any kind 6. Girling .750" Master Cylinder P/N 880358 as delivered, with no machining of any kind 7. Wilwood .750" Master Cylinder P/N 880357 as delivered, with no machining of any kind 8. Tilton .750" Master Cylinder P/N 880360 as delivered, with no machining of any kind"
otherSRF3 adds HD Oil Cooler P/N G1148500 as alternative to standard cooler P/N G480503.
As printed in Fastrack
In SRF, GCR section 9.1.8.D.1.V.ff, change as follows: "SRF3 Oil Cooler, P/N G480503 or HD Oil Cooler P/N G1148500 may be used as mounted per the GEN3 Assembly Manual. No fan permitted for SRF. HD Oil Cooler kit P/N G1148500 may be used as mounted per the GEN3 Conversion Manual."
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
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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.
T2 Touring 2 Post-Runoffs BOP Adjustments and Changes
fasterT2 Spec Corvette to 3200 lbs; Mustang 11-14 restrictor 60→62mm; Mustang 2015-23 tyre 295→315; 996 weights down to 3050/3000 lbs; 997.2 models restrictor 60→65mm, weights reduced 50 lbs.
As printed in Fastrack
In T2 Spec Lines, Spec Corvette, change as follows: Weight: "SC3200 SC+- 3300 See notes section" Notes: "The following “Spec Corvette +” allowances are permitted with a base weight of 3300 lbs:" In T2 Spec Lines, Ford Mustang GT 5.0L (11-14), change Restrictor as follows: "60mm 62mm flat plate restrictor" In T2 Spec Lines, Ford Mustang GT 5.0L (2015-23), change Tire Size as follows: "295 315" In T2 Spec Lines, Porsche 911 / 996 (98-05), change Weight as follows:
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"3600: 3150 3050 3400: 3000" In T2 Spec Lines, Porsche Carrera S 997.2 (06-08), change as follows: Restrictor: "60mm 65mm FPR" Weight: "3225 3175" In T2 Spec Lines, Porsche 911 / Carrera S 997.2 (09-12), change as follows: Restrictor: "60mm 65mm FPR" Weight: "3300 3250 In T2 Spec Lines, Porsche 911 / 997.2 GTS (09-12), change as follows: Restrictor: "60mm 65mm FPR" Weight: "3400 3350"
Applies to Ford Mustang on this page: Michael Kamalian
unclearAS Ford Mustang GT 94-04 Restricted Prep Engine now permits Ford Motorsport M-6250-F303 camshaft.
As printed in Fastrack
In AS Spec Lines, Ford Mustang GT(94-04) with Restricted Prep Engine, add to notes the following: "Ford Motorsport #M-6250-F303 camshaft is permitted."
Applies to Ford Mustang on this page: Michael Kamalian, Thomas J Ellis, Gregory Eaton, James Jost
slowerT2 Ford Mustang Challenge Dark Horse R (2024-) weight increases to 3825 lbs, displacement grows to 5038cc, tire width expands to 315.
As printed in Fastrack
In T2 Spec Lines, Ford Mustang Challenge, change as follows: Car: "Ford Mustang Challenge Darkehorse/Cup Dark Horse R (2024-) Displacement: "92.220 x 92.7 / 4957 93.0mm x 92.7mm 5038cc" Weight: "3650 3775 3825" Restrictor: "2 x 55 mm" Tires: "295 315" Notes: "Safety and camera equipment is unrestricted." "**This car spec line is not eligible for the Runoffs until it has competed in 3 Super Tour events.**
Applies to Ford Mustang on this page: Michael Kamalian
T2 Alternate Placement of Fuse Panel and Electronics Request
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."
unclearT2 Ford Mustang GT 5.0L 15-23 permits Ford Track/Performance Package aero parts M-16600-FP and M-16601-MPP.
As printed in Fastrack
In T2 Spec Lines, Ford Mustang GT 5.0L (2015-2023), add to Notes the following: "Ford Track/Performance Package parts permitted. Performance pack aero parts #M-16600-FP and #M-16601-MPP permitted."
Applies to Ford Mustang on this page: Michael Kamalian
AS Restrictor Plate Change for Gen 2 Ford Coyote Engine
slowerAS Ford Mustang Restricted Prep engines lose 3 mm restrictor plate, from 64 mm to 61 mm.
As printed in Fastrack
In AS Spec Lines, change Restrictor as follows: Ford Mustang Incl. Cobra and Cobra R (79-93) and Mercury Capri (79-86) with Restricted Prep Engine: "64 mm 61 mm" Ford Mustang GT (94-04) with Restricted Prep Engine: "64 mm 61 mm" Ford Mustang Coupe GT (05-14) Restricted Prep 5.0L/6 speed 4 valves per cylinder: "64 mm 61 mm" Ford Mustang GT (05-14) with Restricted Prep Engine: "64 mm 61 mm" Ford Mustang GT 5.0L (15-17) Restricted Preparation: "64 mm 61 mm"
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."
cars addedAS Chevy LS adds Edelbrock Performer RPM 71187 intake manifold with MSD 6014 ignition and 4776 Holly carburetor as spec line option.
As printed in Fastrack
In GCR, Section 9.1.6.D.2.h.2., add the following: "(Effective 2/1/2026) i. Weight based on full preparation chassis choice spec line for GM LM7 5.3L Carburetor Option: Must use the full prep 4776 holly carburetor and spacer gasket Edelbrock Performer RPM 71187 intake manifold MSD 6014 ignition box (Edelbrock part # kit 7118)"
T2 Consideration for Nissan Z & NISMO Z to Touring 2 Class
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
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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."
T2 Request for Classification of MG6 TCR in T2-TCR Class
cars addedT2-TCR adds Link & Co 03 TCR and MG6 TCR, both 3000 lbs, 90% power, 275 max tire width.
As printed in Fastrack
In T2-TCR Spec Lines, classify Link & Co 03 TCR (2019-2025) and MG6 TCR (2019-2022) as follows: T2-TCR Transmission Power Level Weight(lbs) Notes Link & Co 03 TCR (2019- 2025) SEQ 90% 3000 DOT approved tires with maximum section width of 275. T2-TCR splitter and valance must comply with 9.1.4.D.3.f. T2-TCR chassis ride height must
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comply with 9.1.4.1.A.1 MG6 TCR (2019-2022) SEQ 90% 3000 DOT approved tires with maximum section width of 275. T2-TCR splitter and valance must comply with 9.1.4.D.3.f. T2-TCR chassis ride height must comply with 9.1.4.1.A.1
wordingAS class Spec Lines reorganized for 2026; old table format with chassis, engine, weight, tire, and brake data deleted and moved to main rules and build sheets.
As printed in Fastrack
This AS Spec Lines re-organization simplifies the Spec Lines for all drivers. This version gives the chassis information on what engines can be put in their cars. It removes information that is now repeated in the ruleset and adds engine/weight combos as well as wheelbase/tire size information. The Notes in the Spec Lines have been reviewed to remove information now listed in the engine build sheets and retain information pertinent to the chassis selected. Where there is nothing in the notes, it is not an error. It just means everything a driver needs is now in the main rules or the build sheets. In AS Spec Lines, delete current Spec Line in its entirety as follows:
A specification table follows in the original; it is not shown here.
wordingSRF3 spark plugs restricted to NGK LTR7IX-11 P/N G301041 only, washers and sealing rings prohibited.
As printed in Fastrack
In SRF, GCR section 9.1.8.D.2.H.18, add the following: "Spark Plugs: P/N G301041 ONLY NGK LTR7IX-11 / Washers or sealing rings are not allowed for any purpose."
What the rules allowed changed as listed; this does not say what any particular car ran.