T2 + STL + EP at Buttonwillow Raceway Park

2023-03-01 T2 Honda Civic Type R Tire Size Increase

#33672 from Marty Grand · Rule change · TB 23-03 (2023-03 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, Honda Civic Type-R (2017-), change Tire Size as follows:
"275 295"

2023-04-01 EP Investigate Parity of Z3

#33343 from Tim Schreyer · Rule change · TB 23-01 (2023-01 Fastrack)

Summary

As printed in Fastrack

Effective 4/1/2023 In EP Spec Line BMW Z3 2.5L, change Notes as follows:
"58 56mm Flat Plate Intake Restrictor is required with both stock or alternate throttle body."

2023-04-01 T2 Allowance of any nonmetallic bushing material in T2

#33833 from Tyler Quance · Rule change · TB 23-04 (2023-04 Fastrack)

Summary

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."

2023-04-01 T2 Allow Adjustable stabilizer bar links

#33861 from John Heinricy · Rule change · TB 23-04 (2023-04 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, Cadillac CT4-V Blackwing (2022-), add to Notes as follows:
"Adjustable sway bar end links permitted."

2023-05-01 T2 C5 Z06 Straight Line Speed

#33575 from Charlie Abell · Rule change · TB 23-05 (2023-05 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, Chevrolet Corvette C-5 Incl. Fxd Cpe (98-04) Z06 (hardtop) (01-04), change Weight (lbs) as follows:
"3425 w/53mm 56mm flat plate restrictor)
3350 (w/58mm flat plate restrictor, only permitted when using OEM Wheels and Stock Brakes)"

Applies to Chevrolet Corvette on this page: Josh Carroll, David Holmes, Patrick Howe, Evan Gold, Greg Nester, Michael Cheney, Luis Martinez

2023-06-01 T2 2009 Porsche Cayman Classing Request

#34147 from Lisa Hunsicker · Rule change · TB 23-06 (2023-06 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, Porsche Cayman S (06-08), change year as follows:
"Porsche Cayman S (06-08) (06-09)"

2023-06-01 EP 914-6 Valve Size Correction

#34185 from Kip VanSteenburg · Rule change · TB 23-06 (2023-05 Fastrack)

Summary

As printed in Fastrack

In EP Spec Lines, Porsche 914 - 6 2.0L, change Valves IN & EX mm/(in.) as follows:
"(I) 41.9 2.0/(1.65)
(E) 38.1 0/(1.50)"

2023-06-01 STL Clarify STL table B - IT spec notes on Tires

#34187 from Austin Hilliard · Rule change · TB 23-06 (2023-05 Fastrack)

Summary

As printed in Fastrack

In STL Spec Lines, Table B: Alternate Vehicle and Engine Allowances, change Notes as follows:
ITA-spec and ITS-spec RX7: "Must completely conform to ITCS specifications. Tires must conform to 9.1.4, Tires & Wheels. Tires
must also conform to 9.1.4.2.Tires."
ITS, ITA, ITB, or ITC vehicles (1985- ): "Must completely conform to ITCS specifications. Tires must conform to 9.1.4, Tires &
Wheels. Tires must also conform to 9.1.4.2.Tires."

2023-07-01 T2 370Z Obsolete Parts & NISMO Alternatives to SPL Parts

#34297 from Zach Hayward · Rule change · TB 23-06 (2023-05 Fastrack)

Summary

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.

2023-07-01 EP Correct Intake Valve Size on 1500cc Midget/Spitfire

#34419 from Production Committee · Rule change · TB 23-06 (2023-05 Fastrack)

Summary

As printed in Fastrack

In FP Spec Lines, Austin-Healey Sprite Mk. I, II,III, IV MG Midget Mk I,II, III, IV & 1500, change Intake Valve Size as follows:
"(I) 36.65.3/(1.44)"
In FP Spec Lines, Triumph Spitfire Mk. IV & 1500, change Intake Valve Size as follows:
"(I) 36.65.5/(1.440)"
In HP Spec Lines, Triumph Spitfire 1500, change Intake Valve Size as follows:
"(I) 36.65.5/(1.440)"
In HP Spec Lines, Triumph Spitfire Mk. III & IV 1500, change Intake Valve Size as follows:
"(I) 36.65.5/(1.440)"

2023-08-01 T2 Rules Clarification for Mazda RX8 Spec Line

#34395 from Colin Koehler · Rule change · TB 23-08 (2023-08 Fastrack)

Summary

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:

2023-08-01 T2 rule book corrections

#34437 from Chi Ho · Rule change · TB 23-08 (2023-08 Fastrack)

Summary

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."

2023-08-01 T2 Corvette LS2 Restrictor Plate Adjustment

#34456 from Brian LaCroix · Rule change · TB 23-08 (2023-05 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, Chevrolet Corvette C6 Coupe / Grand Sport (05-13), change Notes as follows:
"LS2: 58mm 60mm flat plate restrictor is required."

2023-08-01 T2 Ride Height Correction for the T3 Solstice.

#34615 from Joe Aquilante · Rule change · TB 23-08 (2023-08 Fastrack)

Summary

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."

2023-08-01 T2 Blacking Cadillac Fuel Capacity

#34624 from John Heinricy · Rule change · TB 23-08 (2023-05 Fastrack)

Summary

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."

2023-09-01 EP Hub Note Clean Up In EP TR8 Spec Line

#34649 from Jeff young · Rule change · TB 23-09 (2023-09 Fastrack)

Summary

As printed in Fastrack

In the EP Spec Lines, Triumph TR8 (78-81), remove the following wording from Notes:
"Alternate front hubs are allowed provided they are of the same external dimensions as stock and weigh no less than the stock
hubs."

2023-09-01 EP Triumph GT6 Adjustments

#34662 from ANTHONY PARKER · Rule change · TB 23-09 (2023-09 Fastrack)

Summary

As printed in Fastrack

In EP Spec Lines, Triumph GT6, change Carburetor. No. & Type as follows:
"(2) 1.5” SU or Stromberg Auto-type carburetor(s)"

2023-09-01 EP Triumph GT6 Adjustments: Brakes

#34663 from ANTHONY PARKER · Rule change · TB 23-09 (2023-09 Fastrack)

Summary

As printed in Fastrack

In EP Spec Lines, Triumph GT6, add the following to Brakes Alt.: mm/(in.):
"(F) Calipers & discs from TR-6 (std. or alt)"

2023-12-01 EP Porsche 944/924S Rule Change Request

#35002 from Adam Achepohl · Rule change · TB 23-12 (2023-12 Fastrack)

Summary

As printed in Fastrack

In EP Spec Lines, delete the Porsche 944/924S 2.5L (2V) (83-88) spec line entirely, and create a new spec line for Porsche
944/924S 2.5L(2V) 2.7L(2V) (83-89) as follows:

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

2023-12-01 EP Triumph GT6 Adjustments

#35054 from ANTHONY PARKER · Rule change · TB 23-12 (2023-12 Fastrack)

Summary

As printed in Fastrack

In EP Spec Lines, Triumph GT6, change weight as follows:
"1830 1800"

2023-12-01 T2 M2 CS RACING

#35122 from Clark Giguiere · Rule change · TB 23-12 (2023-12 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, BMW M2 CS Cup 2020-, add to Notes the following:
"Hood vents conforming to 9.1.9.2.D.8.a.7 are permitted."

2024-01-01 EP Request to Review Z3 2.5 Spec Line

#35073 from Tim Schreyer · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

As printed in Fastrack

In EP spec line, BMW Z3 2.5L, change weight as follows:
"2450 2500
*2511 2563
**2573 2625"

2024-01-01 T2 Rebalance Blackwing Cadillac T2

#35079 from John Heinricy · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, Cadillac CT4-V Blackwing (2022-), change as follows:
Wheel size: "(F) 18 x 10 (R) 18 x 11"
Notes: "Sway bars permitted 35mm (f), 30mm (r)"

2024-01-01 T2 M2 CS RACING

#35130 from Clark Giguiere · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

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"

2024-01-01 T2 Spec Corvette in T2

#35139 from David Sanders · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

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."

2024-01-01 T2 T2 Viper BoP

#35155 from Scotty B White · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, Dodge Viper SRT-10 incl. coupe (03-06), change Tire Size as follows:
"(F) 315/35 (R) 345/30 335/30"

2024-01-01 T2 BOP Adjustment for 5.0L Mustangs

#35156 from Kurt Rezzetano · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

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"

Applies to Ford Mustang on this page: Scotty B White

2024-01-01 T2 Take at Look at T-2 BOP

#35161 from Joe Aquilante · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, Chevrolet Camaro, 1LE (2016-), change as follows:
Min Weight: "3550 3500"
Notes: "56mm 58mm flat plate restrictor required."

2024-01-01 T2 C5 Corvette Spec Line Oversight

#35169 from Carl Fung · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, Chevrolet Corvette C-5 Incl. Fxd Cpe (98-04) Z06 (hardtop) (01-04), change as follows:
Min Weight: :3425 w/56mm flat plate restrictor)"
Notes: "59mm flat plate restrictor required."
In T2 Spec Lines, Chevrolet Corvette C6 Coupe / Grand Sport (05-13) change Notes as follows:
"LS2: 60mm 63mm flat plate restrictor is required. LS3: 50mm 53mm flat plate restrictor is required."

Applies to Chevrolet Corvette on this page: Josh Carroll, David Holmes, Patrick Howe, Evan Gold, Greg Nester, Michael Cheney, Luis Martinez

2024-01-01 STL Alternate Carburetor Request for 79-85 RX7 12a

#35181 from Dan Sheppard · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

As printed in Fastrack

In STL Table B: Alternate Vehicle and Engine Allowances, Mazda RX-7 12A (79-85), change Notes as follows:
"Street Porting of the engine only. Bridge porting, peripheral porting, and eyelash porting are prohibited. Contact SCCA National
Office for details of Street porting. Stock Nikki 4 bbl carburetor on a stock manifold only. or auto-type 2 bbl w/42mm choke(s) on
a “dual-y” manifold. Allow the standard removal of emissions related components, and allow air and fuel jets to be corrected.
Modification of the water jacket in the area of the spark plug for cooling purposes is permitted."

2024-01-01 T2 Requested Update of Model Years of 370Z

#35231 from Richard Kulach · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

As printed in Fastrack

In T3 Spec Lines, Nissan 370Z (09-16) / 370Z NISMO Edition (09-13), change model as follows:
"Nissan 370Z (09-16) / 370Z NISMO Edition (09-13) ,incl. Nismo (2009-2022)"

2024-01-01 EP Miata Alternate Head

#35253 from Don Tucker · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

As printed in Fastrack

In EP Spec Lines, Mazda MX-5 /Miata 1.8L (90-97), change weight as follows:
"2200 2150"
Mazda MX-5 /Miata (94-97)
"2035 2000
*2086 2050
**2137 2100"

Applies to Mazda Miata on this page: Joe Carr, Glen McCready, Whitfield Gregg

2024-01-01 EP Triumph GT6 Adjustments

#35255 from Anthony Parker · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

As printed in Fastrack

In EP spec line, Triumph GT6, make the following change in the Notes section:
"Two (2) 1.75” auto-type carburetors @ 1970 40 lbs. Three (3) Weber 40 DCOE on IR manifold with 28mm chokes @ 1990
lbs. Laycock overdrive, May use 5 speed gearbox w/o overdrive. Three (3) Weber 40mm DCOE w/28mm venturi on individual
runner manifold @ 2020 lb."

2024-01-01 EP Honda S2000 throttle body

#35272 from Aaron Johnson · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

As printed in Fastrack

In EP spec line, Honda S2000, make the following changes to its spec line:
Fuel Injected Equipped Throttle Body Inside Diameter: "62 64"
Notes: "Comp. Ratio limited to 12.0:1. Valve lift limited to .500”. An adaptor plate can be used to mount the 62mm throttle body
from '00-05 to the '06-09 intake manifold. The adaptor plate can be no more than 1.25" thick, and its bore must not exceed the
"Fuel Injected Equipped Throttle Body Inside Diameter" maximum spec of 64mm."

2024-01-01 EP Correction within Triumph TR8 Spec Line

#35315 from Production Committee · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

As printed in Fastrack

In EP spec line, Triumph TR8 (78-81), move the "Dry sump allowed" wording to the appropriate location as follows:
Carburetor. No. & Type: “Zenith Stromberg carbs or fuel injection. Dry sump is allowed.”
Notes: “Comp. Ratio limited to 12.0:1, Valve lift limited to .500”. Dry sump is allowed.”

2024-01-01 EP Correction to EP 924S/944 Spec Line

#35317 from Production Committee · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

As printed in Fastrack

In EP spec line, Porsche 944/924S 2.5L (2V) / 2.7L (2V) (83-89), change Weight as follows:

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

2024-02-01 STL ST Electric-Assisted Steering Systems

#35066 from Jose Osiris Pena · Rule change · TB 24-02 (2024-01 Fastrack)

Summary

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"

2024-02-01 STL BOP Adjustments

#35112 from Super Touring Committee · Rule change · TB 24-02 (2024-01 Fastrack)

Summary

As printed in Fastrack

In GCR, 9.1.4.H.1., change as follows:
"Minimum weights for cars with normally aspirated piston engines will be determined by 1.35 lbs/cc displacement for
the installed engine (see the following table). Displacement is the factory displacement for the installed engine. For the
purpose of weight assignment, engine displacement will be rounded to the nearest 50cc (e.g., 2176cc = 2200cc and
2175cc = 2150cc)."
In GCR, 9.1.4.H.1., change Minimum Weight on Chart as follows:
Factory Engine Displacement 1900: "Effective 3-1-24: 2565 2540"
Factory Engine Displacement 1950: "Effective 3-1-24: 2633 2583"

2024-02-01 T2 2015+ Mustang Sway Bar and A-Arm Request

#35154 from Scotty B White · Rule change · TB 24-02 (2024-01 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, Ford Mustang GT 5.0L (15-17), add to Notes the following:
"BMR rear upper control arm camber links part #UTCA064 permitted."

Applies to Ford Mustang on this page: Scotty B White

2024-02-01 T2 Brake Kits

#35245 from David Woodle · Rule change · TB 24-02 (2024-01 Fastrack)

Summary

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.”

2024-02-01 T2 More Car Lightening Stuff

#35319 from Scotty B White · Rule change · TB 24-02 (2024-02 Fastrack)

Summary

As printed in Fastrack

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."

2024-02-01 STL Mazda 12A

#35320 from Super Touring Committee · Rule change · TB 24-02 (2024-02 Fastrack)

Summary

As printed in Fastrack

In STL Spec Lines, Table A, Mazda 12A, change Notes as follows:
"The 5th and 6th intake port actuators and valves may be removed or disabled."

2024-02-01 T2 Inclusion of B-C spec cars in T4

#35374 from Touring Committee · Rule change · TB 24-02 (2024-02 Fastrack)

Summary

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."

2024-02-01 T2 Runoffs wording on Caddy in T2

#35377 from Touring Committee · Rule change · TB 24-02 (2024-01 Fastrack)

Summary

As printed in Fastrack

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."

2024-02-01 T2 T2-T4 Set expiration dates on spec lines

#35378 from Touring Committee · Rule change · TB 24-02 (2024-02 Fastrack)

Summary

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)

2024-02-01 T2 Reply to letter #35161 and #31661

#35384 from Andrew Aquilante · Rule change · TB 24-02 (2024-02 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, Chevrolet Camaro, 1LE (2016-), change as follows:
Min Weight: "3500 3575"
Notes: "58mm 60mm flat plate restrictor required"

2024-02-01 EP Update 1988-1991 Civic to Match 1988-1991 CRX

#35399 from Enrik Benazic · Rule change · TB 24-02 (2024-01 Fastrack)

Summary

As printed in Fastrack

In HP, make the following weight change:
Honda Civic 1.5 (88-91)
“2245 2175
*2301 2229
**2357 2284”

2024-03-01 T2 Reorganize Spec Lines

#35375 from Touring Committee · Rule change · TB 24-03 (2024-03 Fastrack)

Summary

As printed in Fastrack

In T2-T4 Spec Lines, change Spec Line as follows:
"Wheel- base (mm) Required Restrictor"

2024-03-01 T2 370Z Brake Rotor Size Correction

#35487 from Derek Chan · Rule change · TB 24-03 (2024-03 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, Nissan 370Z (09-17) / 370Z NISMO Edition (09-17), change Brakes (mm) as follows:
"(F)320 x 28 Vented R)320 x 16 Vented : (F) 355x32mm Vented(R) 350x20mm Vented”
In T3 Spec Lines, Nissan 370Z, incl. Nismo (2009-2022), change Brakes (mm) as follows:
"(F)320 x 28 Vented (R)320 x 16 Vented : (F) 355x32mm Vented(R) 350x20mm Vented”

2024-03-01 T2 Letter #35154 2018+ Mustang GT Expansion

#35488 from Michael Kamalian · Rule change · TB 24-03 (2024-03 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, Ford Mustang GT 5.0L (2018-), add to Notes as follows:
"BMR rear upper control arm camber links part #UTCA064 permitted."

Applies to Ford Mustang on this page: Scotty B White

2024-03-01 EP GCR Correction - Redundant HP Spec Lines

#35623 from Production Committee · Rule change · TB 24-03 (2024-03 Fastrack)

Summary

As printed in Fastrack

In HP Spec Lines, delete the following redundant spec lines in their entirety:
Spec line #10 - VW Rabbit Cabriolet 1780
Spec line #3 - VW Scirocco 1588
Spec line #4 - VW Scirocco 1780 (8-valve) (83-88)
Spec line #5 - VW Scirocco 1588

2024-04-01 T2 Brake Request for 2009 Porsche Cayman

#35723 from Jason Ott · Rule change · TB 24-04 (2024-04 Fastrack)

Summary

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."

2024-05-01 T2 Allow T4 and T3 RX8 to Disable/Remove Factory Oil Inj.

#35761 from David Mead · Rule change · TB 24-05 (2024-05 Fastrack)

Summary

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."

2024-05-01 T2 Competition Adjustment Request/Wheel Size of E46

#35895 from David Newman · Rule change · TB 24-05 (2024-05 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, BMW M3 (01-06), change Max Wheel Size (inch) as follows:
"18 x 9 18 x 10"

2024-05-01 T2 Driveshafts

#35916 from Scotty B White · Rule change · TB 24-05 (2024-05 Fastrack)

Summary

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."

2024-06-01 EP NIssan 300ZX Z31 to EP

#35830 from Murphy Nichols · Rule change · TB 24-06 (2024-06 Fastrack)

Summary

As printed in Fastrack

In EP Spec Lines, classify Nissan 300ZX (84-89), as follows:

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

2024-06-01 EP RX7 1993 and Up Request In EP Spec Lines, classify

#36031 from Edward Zabinski · Rule change · TB 24-06 (2024-06 Fastrack)

Summary

As printed in Fastrack

Mazda RX-7 (92-97) as follows:

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

2024-06-01 EP Clean-up Multiple EP RX-8 Spec Lines In EP

#36156 from Production Committee · Rule change · TB 24-06 (2024-06 Fastrack)

Summary

As printed in Fastrack

Spec Lines, make the following changes to the two Mazda RX-8 spec lines.
Remove spec line entirely:
Mazda RX-8 (04-11)
Remove the wording "alternate":
Mazda RX-8 (04-11)(alternate)
Spec Mazda (SM/SMX) None.

2024-07-01 T2 Mustang T2/T3

#35877 from Scotty B White · Rule change · TB 24-07 (2024-07 Fastrack)

Summary

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

2024-07-01 T2 S550 Brakes

#35926 from Scotty B White · Rule change · TB 24-07 (2024-07 Fastrack)

Summary

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."

2024-07-01 T2 T2-T4 Driveshaft Mistake...?

#36050 from Scotty B White · Rule change · TB 24-07 (2024-07 Fastrack)

Summary

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."

Applies to Ford Mustang on this page: Scotty B White

2024-07-01 T2 request for allowance of 6 piston calipers for T2 C5 corvettes

#36126 from Joe Aquilante · Rule change · TB 24-07 (2024-07 Fastrack)

Summary

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.

2024-07-01 T2 B8/8.5 Audi S4 T3 and T2

#36195 from Brian Leib · Rule change · TB 24-07 (2024-07 Fastrack)

Summary

As printed in Fastrack

In T3 Spec Lines, Classify Audi S4 (2000-2002) as follows and allow the T2 spec line to expire.

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

2024-08-01 T2 Errors

#36214 from Touring Committee · Rule change · TB 24-08 (2024-08 Fastrack)

Summary

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"

2024-08-01 EP Errant entry in HP production line item

#36231 from Angus Crome · Rule change · TB 24-08 (2024-08 Fastrack)

Summary

As printed in Fastrack

In HP Spec Lines, change Track (F/R)mm/(in.) as follows:
Volkswagen Golf (GTI, GT, GL) (85-92): "2 1537/1529 (60.5/60.2)"
Volkswagen Jetta (GLI, GL) (85-92): "2 1537/1529 (60.5/60.2)"

2024-08-01 T2 Subaru Appeal

#36258 from Anthony Piselli III · Rule change · TB 24-08 (2024-08 Fastrack)

Summary

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**"

2024-08-01 T2 S550 Brakes

#36571 from Club Racing Board · Rule change · TB 24-08 (2024-08 Fastrack)

Summary

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: Scotty B White

2024-11-01 EP 1275 HP Spridget Level 2 Only

#36518 from Darryl Saylor · Rule change · TB 24-09 (2024-09 Fastrack)

Summary

As printed in Fastrack

In HP Spec Lines, Austin-Healey Sprite MkI, II, III, IV MG Midget (ALL) - Level 2 - 1275cc, change Notes as follows:
"(Effective 11/1/2024) Compression ratio limited to 11 12.0:1"
In HP Spec Lines, Austin-Healey Sprite MkI, II, III, IV MG Midget (ALL) - Level 2 - 1098cc, change Notes as follows:
"(Effective 11/1/2024) Compression ratio limited to 11 12.0:1"

2024-11-01 EP NA Miata Track Width Correction

#36902 from Production Committee · Rule change · TB 24-11 (2024-11 Fastrack)

Summary

As printed in Fastrack

In EP Spec Lines, Track (F/R) mm/(in.), change as follows:
Mazda MX-5 /Miata 1.6L (-1993) - "1478/1491 (58.2/58.7) 1516/1534 (59.7/60.4)"
Mazda MX-5 /Miata 1.8L (90-97) - "1483/1509 (58.4/59.4) 1516/1534 (59.7/60.4)"
Mazda MX-5 /Miata (94-97) - "1483/1509 (58.4/59.4) 1516/1534 (59.7/60.4)"

2024-11-01 T2 Spec Corvette Change for T2

#37127 from Joe Aquilante · Rule change · TB 24-11 (2024-11 Fastrack)

Summary

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."

2024-12-01 T2 Redundant Verbiage Regarding Mustang Spec Lines for Driveshaft

#36484 from David Mead · Rule change · TB 24-12 (2024-12 Fastrack)

Summary

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."

2024-12-01 T2 Request Less Restriction for Ls-3 Engined C6 Corvette

#36810 from Joe Aquilante · Rule change · TB 24-12 (2024-12 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, Chevrolet Corvette C6 Coupe / Grand Sport (05-13), change Restrictor Required as follows:
"LS3: 53mm 56mm flat plate restrictor"

2024-12-01 T2 Fuel Emissions Components

#37076 from Derrick Ambrose · Rule change · TB 24-12 (2024-12 Fastrack)

Summary

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."

2024-12-01 EP Triumph GT6 Adjustments

#37112 from Anthony Parker · Rule change · TB 24-12 (2024-12 Fastrack)

Summary

As printed in Fastrack

In EP Spec Lines, make the following changes in the "Triumph GT6" spec line:
Carburetor No. & Type: (2): "1.5” 1.75" Auto-type carburetor(s)"
Notes: "Two (2) 1.75” auto-type carburetors @ 1940 lbs. Three (3) Weber 40 DCOE on IR manifold with 28mm chokes @ 1990
lbs. Laycock overdrive, May use 5 speed gearbox w/o overdrive."

2024-12-01 T2 fix brake wording

#37129 from Touring Committee · Rule change · TB 24-12 (2024-12 Fastrack)

Summary

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

2024-12-01 T2 Evaporative emissions systems

#37130 from Touring Committee · Rule change · TB 24-12 (2024-12 Fastrack)

Summary

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."

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

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

Summary

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."

2024-12-01 T2 Move Spec Boxster to T4

#37158 from Rob Piekarczyk · Rule change · TB 24-12 (2024-12 Fastrack)

Summary

As printed in Fastrack

In T4 Spec Lines, classify Porsche Spec Boxster, as follows:

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

2024-12-01 T2 Corvette Wheels

#37169 from Brian LaCroix · Rule change · TB 24-12 (2024-12 Fastrack)

Summary

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)"

2024-12-01 T2 BMW 320i Spec Line

#37204 from chi ho · Rule change · TB 24-12 (2024-12 Fastrack)

Summary

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."

2024-12-01 T2 Classification for a 2005 Cadillac CTS 3.6 liter 6 speed manual

#37224 from Timothy Nash · Rule change · TB 24-12 (2024-12 Fastrack)

Summary

As printed in Fastrack

In T3 Spec Lines, classify Cadillac CTS (02-07) as follows:

2024-12-01 T2 Please Consider Allowing Update to the C5 Corvette

#37298 from DAVID WOODLE · Rule change · TB 24-12 (2024-12 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, Chevrolet Corvette C-5 Incl. Fxd Cpe (98-04) Z06 (hardtop) (01-04), change Restrictor Required as follows:
"59mm FRP LS1: 59mm FPR, LS2: 63mm FPR, LS3: 56mm FPR"

Applies to Chevrolet Corvette on this page: Josh Carroll, David Holmes, Patrick Howe, Evan Gold, Greg Nester, Michael Cheney, Luis Martinez

2024-12-01 T2 Major error in lane, but nobody ran it.

#37302 from Touring Committee · Rule change · TB 24-12 (2024-12 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, delete Chevrolet Corvette Z06 (06-12) Spec Line in its entirety.

2025-01-01 EP Request to Reduce Weight of BMW 325i/is E30 (84-91) Spec Line

#37119 from Tim Schreyer · Rule change · TB 25-01 (2025-01 Fastrack)

Summary

As printed in Fastrack

In EP SPEC LINES, BMW 325i/is (E30) (84-91), change Weight as follows:
"2200 2150
*2255 2204
**2310 2258"

2025-01-01 T2 BoP for the Various Mustangs

#37185 from Scotty B White · Rule change · TB 25-01 (2025-01 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, Ford Mustang GT 5.0L (11-14), change as follows:
Weight: "3575 3525"

Applies to Ford Mustang on this page: Scotty B White

2025-01-01 T2 Remove spec lines that have expired

#37269 from Touring Committee · Rule change · TB 24-12 (2024-12 Fastrack)

Summary

As printed in Fastrack

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)

2025-01-01 T2 Spec Corvette Line Clarification.

#37441 from Joe Aquilante · Rule change · TB 25-01 (2025-01 Fastrack)

Summary

As printed in Fastrack

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

2025-02-01 T2 Mustang Update backdate

#37275 from Scotty B White · Rule change · TB 25-02 (2025-02 Fastrack)

Summary

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-

Applies to Ford Mustang on this page: Scotty B White

2025-02-01 T2 BOP Adjustment for 2016 - Camaro SS/1LE

#37434 from Kurt Rezzetano · Rule change · TB 25-02 (2025-02 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, Chevrolet Camaro, 1LE (2016-), change as follows:
"Chevrolet Camaro, 1LE (20 16-25)"
Required Restrictor: "58mm 62mm FPR"
Min Weight: "3500 3600"

2025-02-01 T2 BMW M235iR TCS CHANGE REQUEST

#37470 from Werner Kordas · Rule change · TB 25-02 (2025-02 Fastrack)

Summary

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."

2025-02-01 T2 Request to Classify Club Spec in Appropriate Touring Classes

#37523 from Andrew Benagh · Rule change · TB 25-02 (2025-02 Fastrack)

Summary

As printed in Fastrack

In T3 Spec Lines, classify Ford SCCA Club Spec Mustang (CSM) as follows:

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

2025-02-21 EP Effective date for Jan 2025 GCR updates

#37654 from Doug Piner · Rule change · TB 25-02 (2025-02 Fastrack)

Summary

As printed in Fastrack

In EP Spec Lines, add to Notes as follows:
BMW Z3 2.5LL "(Effective 2/21/2025) 52mm Flat Plate Intake Restrictor is required."
BMW Z3 2.8L (97-00): "(Effective 2/21/2025) 55mm Flat Plate Intake Restrictor is required."
BMW 328i/is E36 (96-99): "(Effective 2/21/2025) 58mm Flat Plate Intake Restrictor is required."
BMW 328i/ci E46 (01-06): "(Effective 2/21/2025) 58mm Flat Plate Intake Restrictor is required."
BMW 325i/is E46 (01-06): "(Effective 2/21/2025) 56mm Flat Plate Intake Restrictor is required."
BMW 325i/is E-36 (92-95): "(Effective 2/21/2025) 56mm Flat Plate Intake Restrictor is required."
BMW 325is M-Technic (1994): "(Effective 2/21/2025) 56mm Flat Plate Intake Restrictor is required."

2025-03-01 EP Request Competition Adjustment to BMW Z3 2.5L

#37120 from Tim Schreyer · Rule change · TB 25-01 (2025-01 Fastrack)

Summary

As printed in Fastrack

In EP Spec Lines, change Notes as follows:
BMW Z3 2.5LL "(Effective 3/1/2025) 56mm 52mm Flat Plate Intake Restrictor is required."
BMW Z3 2.8L (97-00): "(Effective 3/1/2025) 59mm 55mm Flat Plate Intake Restrictor is required."
BMW 328i/is E36 (96-99): "(Effective 3/1/2025) 62mm 58mm Flat Plate Intake Restrictor is required."
BMW 328i/ci E46 (01-06): "(Effective 3/1/2025) 62mm 58mm Flat Plate Intake Restrictor is required."
BMW 325i/is E46 (01-06): "(Effective 3/1/2025) 60mm 56mm Flat Plate Intake Restrictor is required."
BMW 325i/is E-36 (92-95): "(Effective 3/1/2025) 60mm 56mm Flat Plate Intake Restrictor is required."
BMW 325is M-Technic (1994): "(Effective 3/1/2025) 60mm 56mm Flat Plate Intake Restrictor is required."

2025-03-01 EP Interpretation of Production Rules on Mirrors

#37235 from Lawrence Slivinski · Rule change · TB 25-03 (2025-03 Fastrack)

Summary

As printed in Fastrack

In GCR, add new rule as Section 9.1.5.E.10.f:
"Any interior or exterior mirror(s) that meets rule 9.3.36 may be used."

2025-03-01 T2 T2 BOP

#37312 from Touring Committee · Rule change · TB 25-01 (2025-01 Fastrack)

Summary

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 Chevrolet Corvette on this page: Josh Carroll, David Holmes, Patrick Howe, Evan Gold, Greg Nester, Michael Cheney, Luis Martinez

2025-03-01 EP Weight Reduction for Honda S2000

#37466 from Michael Unger · Rule change · TB 25-03 (2025-03 Fastrack)

Summary

As printed in Fastrack

In EP, Spec Lines make the following weight changes:

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

2025-03-01 EP Mazda 1999 Miata 1.8L

#37488 from Joe Carr · Rule change · TB 25-03 (2025-03 Fastrack)

Summary

As printed in Fastrack

In EP Spec Lines, make the following weight change:
Mazda MX-5 /Miata (99-05):
"2150 2100
*2204 2153
**2258 2205"

2025-04-01 T2 Please class the Darkhorse R in T2

#37295 from Touring Committee · Rule change · TB 25-04 (2025-04 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, classify the Ford Mustang Challenge Darkehorse R.

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

2025-04-01 T2 T2 350Z Spec Line Cleanup

#37603 from Ben Slechta · Rule change · TB 25-04 (2025-04 Fastrack)

Summary

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

2025-04-01 EP Request for Classification of Chevrolet Spark

#37755 from Kristian Smith · Rule change · TB 25-04 (2025-04 Fastrack)

Summary

As printed in Fastrack

In HP Spec Lines, classify the Chevrolet Spark (16-22):

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

2025-04-01 EP Request to Lower Ford Festiva Minimum Weight to 1600 LBS

#37939 from Doug DeRonne · Rule change · TB 25-04 (2025-04 Fastrack)

Summary

As printed in Fastrack

In HP Spec Lines "Ford Festiva (88-93)" change as follows:
Weight:
"1700 1600
*1743 1640
**1785 1680"
Notes:
"Compression ratio limited to 10.5 11.0:1. Valve lift limited to .450”."

2025-05-01 T2 C6 T-2 Corvette 6 Liter Engine Restrictor

#37490 from Joe Aquilante · Rule change · TB 25-05 (2025-05 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, Chevrolet Corvette C6 Coupe / Grand Sport (05-13), Required Restrictor, change as follows:
LS2: "63mm 67mm FPR"

2025-05-01 STL E&O: SMX Allowance in STL

#37945 from Greg Amy · Rule change · TB 25-05 (2025-05 Fastrack)

Summary

As printed in Fastrack

In STL Spec Lines, Table B, Mazda Spec MX5 Challenge, change as follows:
Minimum Weight: "2500 See 9.1.7.1."
Notes: "Mazda MX5 Challenge car must utilize the following components: Roush CNC cylinder head 0000-01-5300,Mahle
standard or +0.005 0000-01-5310, OEM camshaft, 11:1 compression ratio, header 0000-06-5407-NC, exhaust 0000-06-5427-NC,
cold air intake 0000- 06-5150-KT, ECU flash 0000-01-5379, Pagid front brake pads 0000-03-5104-SP or endurance pads 0000-03-
5104-EN, Pagid rear brake pads 0000-03-5114-SP or endurance pads 0000-03-5114-EN, Penske front shock 0000-04-5291-SA,
Penske rear shock 0000-04-5292-SA, Penske rear mount kit 0000-04-5358, Front mount kit 0000-04-5359, Front offset bushing
0000-04-5407-NC, Eibach front springs 0000-04-9700-08, Eibach rear springs 0000-04-9400-07, Eibach helper springs 0000-04-

Applies to Mazda Miata on this page: Jared Korth, Ricardo Arruda, Gavin Wardle, Ryan Gutile, Bryce Johnson, Andy Chittum, Adrian Comstock

2025-05-01 T2 370Z Mid link Replacement for True Coil Overs and OEM Wheel Size

#38014 from Zachary Hayward · Rule change · TB 25-05 (2025-05 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, Nissan 370Z (09-17) / 370Z NISMO Edition (09-17), change as follows:
Max Wheel Size: "19 x 10 10.5"
Notes: "5300S-SS370 T-2 spring kit allowed; 54600-SS370 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. 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 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. SPL
Part# SPL RTA Z34D or NISMO Part# 551B0-RTARZ permitted. Zspeed and Z1 alternative clutch slave permitted. The following

2025-05-01 T2 T2 Cadillac tire

#38210 from Touring Committee · Rule change · TB 25-05 (2025-05 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, CT4-V Blackwing (2022-), change Tire Size Max as follows:
“295 315”

2025-06-01 EP Base Weight Adjustment for H-Production X1/9 Spec Lines

#38255 from Matthew Brannon · Rule change · TB 25-06 (2025-06 Fastrack)

Summary

As printed in Fastrack

In HP Spec Lines, change Weight as follows:
Fiat X-1/9 & Bertone1500: “1790 1740 *1835 1784 **1880 1827”
Fiat X-1/9 1300: “1650 1600 *1691 1640 **1733 1680”
Fiat X-1/9 1300: “2060 2010”
Fiat X-1/9 1500: “1950 1900”

2025-07-01 EP BMW Z4 update

#38490 from Bryce McGuire · Rule change · TB 25-07 (2025-07 Fastrack)

Summary

As printed in Fastrack

In EP Spec Lines, BMW Z4 (03-05), add to Notes the following:
“52mm Flat Plate Intake Restrictor.”

2025-07-01 EP EP Fiat 124 Spider Competition Adjustment Request

#38498 from John Baucom · Rule change · TB 25-07 (2025-07 Fastrack)

Summary

As printed in Fastrack

In EP Spec Lines, Fiat 124 Sport Spider 1600 & 124 Spider 2000, change as follows:
Weight: "2050 2000"
Carburetor No. & Type: "(2) Weber 40 IDF-40IFI, (2) Solex C40P116, 34 36mm choke(s) req’d, (2) Weber 45DCOE w/ 34 36 mm
choke(s) on I.R. manifold or fuel injection."

2025-08-01 T2 Incorrect Touring Heading

#38451 from Terry Hanushek · Rule change · TB 25-08 (2025-08 Fastrack)

Summary

As printed in Fastrack

In T2-T4 Spec Lines, change Table Header as follows:
"T2 ET"

2025-08-01 T2 Clarifications needed to BMW M2 CS cup line

#38536 from Joe Aquilante · Rule change · TB 25-08 (2025-08 Fastrack)

Summary

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

2025-08-01 T2 Fix brake allowance supersessions.

#38554 from Touring Committee · Rule change · TB 25-08 (2025-08 Fastrack)

Summary

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."

2025-08-01 STL Lotus Weight Reduction

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

Summary

As printed in Fastrack

In 9.1.2. GT2/ST Spec Lines, Lotus Evora GT4, change Weight as follows:
"2750 2700"
In STU Table B: Alternate Vehicle and Engine Allowances, change Weight as follows:
Lotus Elise Cup R: "2300 2250"
Lotus Elise SC/ Lotus Exige SC: "2300 2550
2500 2450"

2025-08-01 T2 C5 Corvette correction

#38782 from Touring Committee · Rule change · TB 25-08 (2025-08 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, Chevrolet Corvette C-5 Incl. Fxd Cpe (98-04) Z06 (hardtop) (01-04), change Restrictor Required as follows:
"LS1: 59 58mm FPR,
LS2: 63mm FPR,
LS3: 56mm FPR,
LS6: 58mm FPR"

Applies to Chevrolet Corvette on this page: Josh Carroll, David Holmes, Patrick Howe, Evan Gold, Greg Nester, Michael Cheney, Luis Martinez

2025-10-01 EP HP Plymouth Arrow spec omission

#38995 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)

Summary

As printed in Fastrack

In HP Spec Lines, Plymouth Arrow (76-80), add the following wording to Trans. Speeds(max):
"4 or 5"

2025-10-01 EP Add Wheel Diameter to Appendix G

#39008 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)

Summary

As printed in Fastrack

In Appendix G.2.3, change as follows:
"Rim width and diameter are is absolute maximums."

2025-10-01 EP Add TB ID tolerance to general Prod rules

#39009 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)

Summary

As printed in Fastrack

In GCR, Section 9.1.5.E., change as follows:
9.1.5.E.1.b.4: "The inside dimensions of the throttle body casting/housing (as measured at the throttle butterfly) must remain
stock (tolerance of +/-.25mm), but the throttle body can otherwise be ported and polished."
9.1.5.E.2.b.4: "The inside dimensions of the throttle body casting/housing and all dimensions of the throttle butterfly must
remain stock (tolerance of +/-.25mm)."

2025-11-01 EP Please Lower Weight of 280Z

#38871 from Matthew Miller · Rule change · TB 25-09 (2025-09 Fastrack)

Summary

As printed in Fastrack

In EP Spec Lines, Nissan 280Z, change Weight (lbs) as follows:
"(Effective 11/1/2025) 2560 2400
*2624 2460
**2688 2520"

2025-11-01 EP Miata Weight Adjustment Follow Up

#38949 from Don Tucker · Rule change · TB 25-10 (2025-10 Fastrack)

Summary

As printed in Fastrack

In EP Spec Lines, Mazda MX-5 / Miata 1.8L (90-97), Effective 11/1/2025 make the following weight change:
"2150 2125"

2025-11-01 EP Weight Break for 1098 Midget / Sprite

#38970 from Kendall Jones · Rule change · TB 25-10 (2025-10 Fastrack)

Summary

As printed in Fastrack

In HP Spec Lines, Austin-Healey Sprite/Midget 1098cc, Effective 11/1/2025make the following weight change:
"1630 1550"

2025-11-01 EP HP Volvo 142 spec omission

#38994 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)

Summary

As printed in Fastrack

In HP Spec Lines, Volvo 142/142E P-1800 Engine, Effective 11/1/2025 add the following wording to Notes:
"Comp. Ratio limited to 12.0:1. Valve lift limited to .425”."

2025-11-01 EP HP Mini DOHC 1.6

#38996 from Production Committee · Rule change · TB 25-10 (2025-10 Fastrack)

Summary

As printed in Fastrack

In HP Spec Lines, Mini Cooper (07-13) (includes 09-15 convertible and 12-15 Coupe), Effective 11/1/2025 make the following
changes to the Notes:
"Compression ratio limited to 11.0:1, Valve lift limited to .450”.390"."

2025-11-01 EP Add to Rabbit description

#39019 from Production Committee · Rule change · TB 25-11 (2025-11 Fastrack)

Summary

As printed in Fastrack

In FP Spec Lines, make the following spec line correction:
"Volkswagen Rabbit (Includes Convertible Cabriolet)"
In HP Spec Lines, make the following spec line correction:
"Volkswagen Rabbit 1588 (Includes Cabriolet)"
"Volkswagen Rabbit 1715 (Includes Cabriolet)"
"Volkswagen Rabbit 1780 (Includes Cabriolet)"

2025-11-01 EP Clean-up 9.1.5.E.7e

#39025 from Production Committee · Rule change · TB 25-11 (2025-11 Fastrack)

Summary

As printed in Fastrack

In GCR, Section 9.1.5.E.7., change as follows:
"e. Cars fitted with rear drum brakes, can convert to rear disc brakes without penalty. Note that the “Brakes Std.” and “Brakes
Alt.” listings on a vehicle’s spec line do not prohibit a car that was fitted with rear drum brakes stock, from converting to rear
disc brakes under this rule. When converting from rear drum brakes to rear disc brakes:
1. Rear brake rotors must be solid and can be no larger in diameter than the largest permitted front brake rotor, as defined on
the vehicle’s spec line.
2. Rear calipers and mounting brackets are unrestricted but must be made of a ferrous or aluminum material. The standard and
alternate brake listings on a vehicle’s specification line, does not prohibit a car that was fitted with rear drum brakes as stock

2025-11-01 EP Add TB size to Ford Mustang (94-98) Spec Line

#39130 from Production Committee · Rule change · TB 25-11 (2025-11 Fastrack)

Summary

As printed in Fastrack

In EP Spec Lines, Ford Mustang (94-98) add the following to the Fuel Injected Equipped Throttle Body Inside Diameter column:
"60"

2025-11-01 T2 ND Gearset Request for T4

#39166 from Josh Smith · Rule change · TB 25-11 (2025-11 Fastrack)

Summary

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."

2025-11-01 T2 ND Spec Lines Wrong PT#'s

#39170 from Josh Smith · Rule change · TB 25-11 (2025-11 Fastrack)

Summary

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

2025-11-01 T2 Touring 2 Post-Runoffs BOP Adjustments and Changes

#39274 from Touring Committee · Rule change · TB 25-11 (2025-11 Fastrack)

Summary

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:

Applies to Ford Mustang on this page: Scotty B White

2025-11-01 T2 Adjust rev limit on Spec Corvette in T2

#39282 from Touring Committee · Rule change · TB 25-11 (2025-11 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, Spec Corvette, add to Notes the following:
"7) up to 7100 rpm Rev limit."

2025-12-01 T2 Help the 2011-2014 s197Mustang GT and Boss302 Less Restriction

#38523 from Joe Aquilante · Rule change · TB 25-12 (2025-12 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, Ford Mustang Boss 302 (12-13), change Restrictor as follows:
"56mm 63mm flat plate restrictor"
In T2 Spec Lines, Ford Mustang GT 5.0L (11-14), change Restrictor as follows:
"60mm 65mm flat plate restrictor"

Applies to Ford Mustang on this page: Scotty B White

2025-12-01 T2 Improving Competitiveness of Gen 5 Camaro SS

#39021 from Van Hunter · Rule change · TB 25-12 (2025-12 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, Chevrolet Camaro SS/1LE (10-15), change Weight as follows:
"3625 3575"

2025-12-01 EP TR2 Notes E&O

#39180 from Anthony Parker · Rule change · TB 25-12 (2025-12 Fastrack)

Summary

As printed in Fastrack

In EP Spec Lines, Triumph TR2, 3, 3A, 4, 4A, TR4, TR4A, IRS, make the following change to the Notes:
"Front apron assembly may be made of alternate material. Three (3) Weber 40 DCOE on IR manifold with 28mm chokes @ 1990
lbs. Laycock overdrive, may use 5 speed gearbox without overdrive."

2025-12-01 EP Balance of Power

#39187 from Jim Simaras · Rule change · TB 25-12 (2025-12 Fastrack)

Summary

As printed in Fastrack

In EP Spec Lines, make the following changes to Restrictors:
BMW Z3 2.5L: "52mm 50mm Flat Plate Intake Restrictor"
BMW Z3 2.8L (97-00): "55mm 53mm Flat Plate Intake Restrictor"
BMW 328i/is E36 (96-99): "58mm 55mm Flat Plate Intake Restrictor"
BMW 328i/ci E46 (01-06): "58mm 55mm Flat Plate Intake Restrictor"
BMW 325i/is (E46) (01-06): "56mm 53mm Flat Plate Intake Restrictor"
BMW 325is M-Technic (1994): "56mm 53mm Flat Plate Intake Restrictor"
BMW 325i/is E-36 (92-95): "56mm 53mm Flat Plate Intake Restrictor"

2025-12-01 T2 Adjust T2 Darkhorse R

#39346 from Andrew Aquilante · Rule change · TB 25-12 (2025-12 Fastrack)

Summary

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: Scotty B White

2026-01-01 EP Request to Update E30 BMW Throttle Body Diameter Verbiage

#39363 from Tim Schreyer · Rule change · TB 26-01 (2026-01 Fastrack)

Summary

As printed in Fastrack

In EP Spec Line BMW 325i/is E30 (84-91), change Drivetrain Notes as follows:
"Fuel Injection, TB: 60mm"

2026-01-01 T2 Alternate Placement of Fuse Panel and Electronics Request

#39370 from Aaron Stehly · Rule change · TB 26-01 (2026-01 Fastrack)

Summary

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."

2026-01-01 T2 Rebalance Blackwing Cadillac T2 for 2026

#39426 from John Heinricy · Rule change · TB 26-01 (2026-01 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, Cadillac CT4-V Blackwing (2022-), change Weight as follows:
"3800 3750"

2026-01-01 T2 C6 LS2 Corvette Parity Request

#39472 from Brian LaCroix · Rule change · TB 26-01 (2026-01 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, Chevrolet Corvette C6 Coupe / Grand Sport (05-13), change Restrictor as follows:
"LS2: 67mm 80mm FPR LS3: 56mm FPR"

2026-01-01 T2 T2 Tire Sizing

#39490 from Scotty B White · Rule change · TB 26-01 (2026-01 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, Dodge Viper SRT10 incl. coupe (03-06), change Weight as follows:
"3675 3650"

2026-01-01 T2 Rear Spoiler for Mustang GT S550 (15-23)

#39499 from Andrew Aquilante · Rule change · TB 26-01 (2026-01 Fastrack)

Summary

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: Scotty B White

2026-01-01 T2 Clarify T4 Brake Rotor Allowance

#39503 from David Mead · Rule change · TB 26-01 (2026-01 Fastrack)

Summary

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."

2026-01-01 STL Weight adjustment for STL

#39579 from Super Touring Committee · Rule change · TB 26-01 (2026-01 Fastrack)

Summary

As printed in Fastrack

In GCR, Section 9.1.4.2.H.1. change Minimum Weight on chart as follows:

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

2026-02-01 T2 Request to Add 2014-2017 435i to T2

#38991 from Jimmy Cabrera · Rule change · TB 26-02 (2026-02 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, classify as follows BMW 435I (2014-2017):

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

2026-02-01 T2 Consideration for Nissan Z & NISMO Z to Touring 2 Class

#39296 from Greg Nelson · Rule change · TB 26-02 (2026-02 Fastrack)

Summary

As printed in Fastrack

In T2 Spec Lines, classify Nissan Z incl. Nismo as follows:

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

2026-02-01 T2 Allow Alt Bushing Material in Toe Links

#39607 from David Mead · Rule change · TB 26-02 (2026-02 Fastrack)

Summary

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

2026-02-01 T2 Request for Classification of MG6 TCR in T2-TCR Class

#39702 from Vito Jin · Rule change · TB 26-02 (2026-02 Fastrack)

Summary

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