BoP Lab / Buttonwillow Raceway Park

EP + P + T2 at Buttonwillow Raceway Park

No mapCal Club 2024

This track has been raced on 2 configurations (The Circuit, 2.57 mi; 2.92 mi). Laps on different configurations are not comparable, so only events on the 2.57 mile layout are shown; switch above to see the others.

Pos	Car	Driver	Class	#	Lap	Theoretical	Qual	Race	5-lap stint	Consistency	Trap	S1	S2	S3
1	Elan DP02/Mazda	Jim Devenport	P	23, 28	1:32.576 A-P	1:32.284	1:32.872 B-Q2	1:33.972 B-R2	1:35.195 B-R1	+1.742 B-R1	171.9 A-P	25.461 B-Q2	26.606 A-P	40.217 A-P
2	Dauntless Stohr	Johnnie Crean	P	3, 135	1:36.516 B-Q1	1:36.516	1:36.516 B-Q1	1:39.209 B-R1	1:40.027 B-R1	+1.943 B-R1	157.4 B-P	25.956 B-Q1	28.143 B-Q1	42.417 B-Q1
3	Dauntless-Stohr P07d	John Manfroy	P	08	1:37.287 A-R2	1:36.339	1:41.818 A-Q1	1:37.287 A-R2	1:39.027 A-R2	+2.902 A-R2	160.4 A-R2	26.696 A-R2	27.257 A-R2	42.386 A-R2
4	Stohr WF1	Kevin Mitz	P	13	1:38.716 A-Q2	1:38.667	1:38.716 A-Q2	1:39.638 A-R2	1:40.087 A-R2	+0.641 A-R2	155.4 A-Q1	26.934 A-Q2	28.397 A-Q2	43.336 A-Q2
5	Penton Norma M20FC	Joseph Moran	P	7	1:39.296 A-Q2	1:38.868	1:39.296 A-Q2	1:40.832 A-R1	1:42.328 A-R1	+3.544 A-R1	149.0 A-Q2	27.106 B-Q1	28.111 A-Q1	43.651 A-Q1
6	Honda Civic TCR	Rylan Hazelton	T2	49	1:51.198 A-Q1	1:50.763	1:51.198 A-Q1	1:51.454 A-R1	1:51.718 A-R1	+1.803 A-R1	140.1 A-R1	30.640 A-Q1	31.962 A-Q1	48.161 A-R1
7	Mazda Miata	Joe Carr	EP	12	1:52.034 B-P	1:52.034	1:59.603 A-Q1	1:59.157 A-R1	1:59.373 A-R1	+0.724 A-R1	131.6 A-R1	31.719 B-P	32.405 B-P	49.966 B-P
8	Chevrolet	Oli Thordarson 2+ cars	T2	121, 122	1:52.045 B-P	1:51.914	1:54.065 B-Q1	1:52.758 B-R1	1:53.593 B-R1	+0.980 B-R1	114.9 B-P	30.654 B-P	32.604 B-R1	48.656 B-P
9	Chevrolet Corvette	Josh Carroll	T2	35	1:52.276 A-Q2	1:51.896	1:52.276 A-Q2	1:52.993 A-R2	1:53.334 A-R2	+1.248 A-R2	144.5 A-Q2	30.813 A-Q2	32.300 A-Q1	48.783 A-P
10	Chevrolet Corvette	David Holmes	T2	171	1:52.705 A-Q2	1:52.489	1:52.705 A-Q2	1:53.499 A-R1	1:54.684 A-R2	+1.099 A-R2	143.9 A-Q2	30.883 A-Q1	32.407 A-Q2	49.199 A-Q2
11	Mazda MX-5	Glen McCready	EP	4	1:53.088 B-Q2	1:52.984	1:53.088 B-Q2	1:53.487 B-R2	1:54.617 B-R2	+2.232 B-R2	125.6 B-P	30.761 B-R2	32.765 B-Q1	49.458 B-Q2
12	Chevrolet Chevrolet	Oli Thordarson 2+ cars	T2	122	1:53.309 A-Q2	1:53.051	1:53.309 A-Q2	1:54.433 A-R1	1:55.036 A-R2	+0.674 A-R2	142.9 A-R1	31.173 A-P	32.798 A-Q1	49.080 A-P
13	Chevrolet Corvette Z06	Greg Nester	T2	32	1:53.653 A-Q2	1:53.567	1:53.653 A-Q2	1:54.838 A-R1	1:55.189 A-R2	+0.472 A-R2	135.9 A-R1	31.106 A-Q2	32.902 A-Q2	49.559 A-Q2
14	Chevrolet Corvette	Patrick Howe	T2	03	1:53.679 A-P	1:53.373	1:54.829 A-Q1	1:55.392 A-R2	1:56.107 A-R2	+1.043 A-R2	146.6 A-Q2	31.124 A-Q1	33.112 A-Q1	49.137 A-P
15	Chevrolet Corvette	Evan Gold	T2	37	1:53.749 A-R1	1:53.155	1:53.792 A-Q2	1:53.749 A-R1	1:55.163 A-R2	+0.789 A-R2	138.7 A-Q1	31.295 A-R1	32.797 A-Q2	49.063 A-R1
16	Chevrolet Corvette Z06	Michael Cheney	T2	17	1:54.983 A-R2	1:54.489	1:55.079 A-Q1	1:54.983 A-R2	1:55.791 A-R2	+1.987 A-R2	138.0 A-Q1	31.504 A-Q1	33.215 A-Q1	49.770 A-Q1
17	Ford Mustang GT	Scotty B White	T2	0	1:55.309 A-Q1	1:55.233	1:55.309 A-Q1	1:56.025 A-R1	1:56.446 A-R1	+0.956 A-R1	133.2 A-R1	31.540 A-Q1	33.554 A-R1	50.139 A-Q1
18	Chevrolet C5 Z06	Luis Martinez	T2	77	1:55.450 A-R1	1:54.548	1:55.662 A-Q1	1:55.450 A-R1	1:56.522 A-R1	+3.951 A-R1	129.8 A-R1, A-Q2	31.045 A-R1	33.509 A-R1	49.994 A-R1
19	Mazda RX-7	Kurt Frietzsche	EP	40	1:56.468 B-Q1	1:55.599	1:56.468 B-Q1	1:56.573 B-R1	1:57.721 B-R1	+1.914 B-R1	120.7 A-R2	31.324 B-Q1	34.071 B-R1	50.204 B-R1
20	Mazda RX-7	Brandon Droese	EP	02	1:56.943 B-Q1	1:56.657	1:56.943 B-Q1	1:58.611 B-R1	1:58.767 B-R1	+0.718 B-R1	94.1 B-Q1, B-R1	31.953 B-R1	33.891 B-Q1	50.813 B-Q1
21	BMW E30	Sean Lovett	EP	37	2:00.712 A-Q2	2:00.625	2:00.712 A-Q2	2:01.864 A-R2	2:02.200 A-R1	+0.528 A-R1	127.6 A-Q2	32.761 A-Q1	34.806 A-Q1	53.058 A-Q2
22	Porsche Boxster	William Robinson	EP	198	2:01.940 A-Q1	2:01.634	2:01.940 A-Q1	2:02.887 A-R1	2:03.347 A-R1	+1.312 A-R1	130.6 A-Q2	32.969 A-Q1	35.257 A-Q1	53.408 A-Q1
23	Mazda MX-5	Whitfield Gregg	EP	17	2:03.660 B-Q2	2:03.314	2:03.660 B-Q2	2:04.085 B-R1	2:05.470 B-R2	+2.529 B-R2	97.7 B-R2	33.862 B-R2	35.422 B-R1	54.030 B-Q2

One row per driver and car (a driver who changed cars has a row for each). Each cell is that driver's best in that car across the selected events, with the session it was set in. Best 5-lap stint is the mean of the driver's quickest five consecutive race laps, and consistency is how far their median race lap sat behind their best in that race (small is a driver who does it every lap); both come from the race with the best stint. The fastest in each column is purple, and a car whose best lap is more than 115% of the fastest in its class is greyed (marked ">115%" beside the driver) and left out of the colour scale. Click a column to sort, a row to highlight it. Theoretical lap is the sum of the best sectors, whichever laps they came from, and never slower than the best lap (where a car's fastest laps were recorded without sector times, its best lap is used). The 115% mark is about the car's best lap only: a car whose best lap is within 115% of the fastest in its class is never marked. Greyed sectors with no theoretical lap mean the sector times on file do not add up to a believable lap. Letters refer to the events above; Q is qualifying, R a race.

Sectors

S1 SF → IM1 0.65 mi
S2 IM1 → IM2 0.75 mi
S3 IM2 → SF 1.17 mi
Spd In → Out 0.03 mi

Sectors are numbered in lap order from start/finish, whatever each event's timing called them; the loop names are SCCA timing's.

By car

Car	Class	Drivers	Lap	Qual	Race	Trap	S1	S2	S3
Elan DP02/Mazda	P	1	1:32.576Jim Devenport	1:32.872Jim Devenport	1:33.972Jim Devenport	171.9Jim Devenport	25.461Jim Devenport	26.606Jim Devenport	40.217Jim Devenport
Dauntless Stohr	P	2	1:36.516Johnnie Crean	1:36.516Johnnie Crean	1:37.287John Manfroy	160.4John Manfroy	25.956Johnnie Crean	27.257John Manfroy	42.386John Manfroy
Dauntless Stohr	P	1	1:36.516Johnnie Crean	1:36.516Johnnie Crean	1:39.209Johnnie Crean	157.4Johnnie Crean	25.956Johnnie Crean	28.143Johnnie Crean	42.417Johnnie Crean
Dauntless-Stohr P07d	P	1	1:37.287John Manfroy	1:41.818John Manfroy	1:37.287John Manfroy	160.4John Manfroy	26.696John Manfroy	27.257John Manfroy	42.386John Manfroy
Stohr WF1	P	1	1:38.716Kevin Mitz	1:38.716Kevin Mitz	1:39.638Kevin Mitz	155.4Kevin Mitz	26.934Kevin Mitz	28.397Kevin Mitz	43.336Kevin Mitz
Penton Norma M20FC	P	1	1:39.296Joseph Moran	1:39.296Joseph Moran	1:40.832Joseph Moran	149.0Joseph Moran	27.106Joseph Moran	28.111Joseph Moran	43.651Joseph Moran
Honda Civic TCR	T2	1	1:51.198Rylan Hazelton	1:51.198Rylan Hazelton	1:51.454Rylan Hazelton	140.1Rylan Hazelton	30.640Rylan Hazelton	31.962Rylan Hazelton	48.161Rylan Hazelton
Mazda Miata	EP	1	1:52.034Joe Carr	1:59.603Joe Carr	1:59.157Joe Carr	131.6Joe Carr	31.719Joe Carr	32.405Joe Carr	49.966Joe Carr
Chevrolet	T2	1	1:52.045Oli Thordarson	1:54.065Oli Thordarson	1:52.758Oli Thordarson	114.9Oli Thordarson	30.654Oli Thordarson	32.604Oli Thordarson	48.656Oli Thordarson
Chevrolet Corvette	T2	7	1:52.276Josh Carroll	1:52.276Josh Carroll	1:52.993Josh Carroll	146.6Patrick Howe	30.813Josh Carroll	32.300Josh Carroll	48.783Josh Carroll
Chevrolet Corvette	T2	4	1:52.276Josh Carroll	1:52.276Josh Carroll	1:52.993Josh Carroll	146.6Patrick Howe	30.813Josh Carroll	32.300Josh Carroll	48.783Josh Carroll
Chevrolet Corvette Z06	T2	2	1:53.653Greg Nester	1:53.653Greg Nester	1:54.838Greg Nester	138.0Michael Cheney	31.106Greg Nester	32.902Greg Nester	49.559Greg Nester
Chevrolet C5 Z06	T2	1	1:55.450Luis Martinez	1:55.662Luis Martinez	1:55.450Luis Martinez	129.8Luis Martinez	31.045Luis Martinez	33.509Luis Martinez	49.994Luis Martinez
Mazda MX-5	EP	2	1:53.088Glen McCready	1:53.088Glen McCready	1:53.487Glen McCready	125.6Glen McCready	30.761Glen McCready	32.765Glen McCready	49.458Glen McCready
Chevrolet Chevrolet	T2	1	1:53.309Oli Thordarson	1:53.309Oli Thordarson	1:54.433Oli Thordarson	142.9Oli Thordarson	31.173Oli Thordarson	32.798Oli Thordarson	49.080Oli Thordarson
Ford Mustang	T2	1	1:55.309Scotty B White	1:55.309Scotty B White	1:56.025Scotty B White	133.2Scotty B White	31.540Scotty B White	33.554Scotty B White	50.139Scotty B White
Mazda RX-7	EP	2	1:56.468Kurt Frietzsche	1:56.468Kurt Frietzsche	1:56.573Kurt Frietzsche	120.7Kurt Frietzsche	31.324Kurt Frietzsche	33.891Brandon Droese	50.204Kurt Frietzsche
BMW E30	EP	1	2:00.712Sean Lovett	2:00.712Sean Lovett	2:01.864Sean Lovett	127.6Sean Lovett	32.761Sean Lovett	34.806Sean Lovett	53.058Sean Lovett
Porsche Boxster	EP	1	2:01.940William Robinson	2:01.940William Robinson	2:02.887William Robinson	130.6William Robinson	32.969William Robinson	35.257William Robinson	53.408William Robinson

The best any driver of each car managed across the selected events, with who set it. Spellings and model years of the same car are grouped; click a row marked ▸ to see each version. Grouping is worked out from the names, so tell us if two cars are wrongly merged or split.

Rule changes between these events

Cal Club 2024 → Cal Club 2025 2024-02-23 to 2025-02-22

2024-03-01 T2 Reorganize Spec Lines

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

unclearT2-T4 Spec Lines remove wheelbase requirement, replace with Required Restrictor specification.

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)

neutralT2 and T3 Nissan 370Z brake rotors enlarged: front 320x28 to 355x32mm, rear 320x16 to 350x20mm vented.

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)

neutralT2 Mustang GT 5.0L 2018+ now permits BMR rear upper control arm camber links part #UTCA064.

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)

neutralHP removes four redundant VW spec lines: Rabbit Cabriolet 1780, Scirocco 1588, Scirocco 1780 8-valve, Scirocco 1588.

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)

slowerT2 Porsche Cayman S 06-09 allows StopTech ST60/ST40 brake kit with 50 lb penalty.

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)

unclearT3 and T4 Mazda RX-8 may remove or disable factory oil injection system.

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)

fasterT2 BMW M3 01-06 max wheel size increases from 18 x 9 to 18 x 10 inch.

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)

slowerT2, T3, T4 driveshafts may use alternative materials or one-piece units; non-OEM adds 25 lbs.

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)

neutralNissan 300ZX 84-89 classified to EP at 2550 lbs minimum, 2960cc 6-cyl SOHC, fuel injection, 12.0:1 compression limit, 0.500" valve lift limit.

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)

neutralMazda RX-7 92-97 newly classified EP Prep Level 2 at 2200–2310 lbs with 13B 6-port rotary engine.

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)

neutralEP Mazda RX-8 (04-11) alternate spec line removed; one primary line remains.

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)

unclearFord Mustang GT 5.0L and V6 now permit Track/Performance Package parts in T2 and T3.

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)

slowerT2 Ford Mustang S550 5.0 Gen2/Gen3 gains 100 lbs with stock or Brembo 355mm brakes.

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)

fasterT2-T4 Ford Mustangs: remove 25 lbs penalty for non-OEM driveshaft, clarify alternate driveshaft allowances.

In GCR Section 9.1.9.2.D.4.b.6., remove as follows:
"~~If non-OEM driveshaft is used, add 25 lbs.~~"
In T2 Spec Lines, Ford Mustang V6 (11-14), change Notes as follows:
"~~Driveshaft from~~ Alternate ~~metallic~~ driveshaft is allowed."
In T2 Spec Lines, Ford Mustang Boss 302 (12-13), change Notes as follows:
"Alternate ~~metallic~~ driveshaft is allowed."
In T2 Spec Lines, Ford Mustang GT 5.0L (11-14)ki, change Notes as follows:
"Alternate ~~metallic~~ driveshaft is allowed."

Show 12 more lines

In T2 Spec Lines, Ford Mustang GT 5.0L (15-17), change Notes as follows:
"Alternate ~~metallic~~ driveshaft is allowed."
In T2 Spec Lines, Ford Mustang GT 5.0L (2018-), change Notes as follows:
"Alternate ~~metallic~~ driveshaft is allowed."
In T2 Spec Lines, Ford Mustang Coupe GT & Shelby GT 4.6L (05-10), change Notes as follows:
'~~An Aluminum driveshaft is allowed.~~"
"~~Alternate metallic driveshaft is allowed.~~"
In T3 Spec Lines, Ford Mustang Coupe GT & Shelby GT 4.6L & Cal. Special (05-10), change Notes as follows:
"~~An Aluminum driveshaft is allowed.~~"
"~~Alternate metallic driveshaft is allowed.~~"
In T3 Spec Lines, Ford Mustang V6 (11-14), change Notes as follows:
"~~Driveshaft from Alternate metallic driveshaft is allowed.~~"

Applies to Ford Mustang on this page: Scotty B White

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)

fasterT2 Corvette C5, Camaro SS, Firebird, Solstice GXP, C6 allow four or six piston front calipers.

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)

neutralAudi S4 (2000-2002) moves to T3 with 3400 lbs minimum weight, 38mm turbo inlet restrictor required.

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)

unclearT2 Corvette C6 LS2 restrictor increases to 63mm; Camaro 1LE weight drops to 3500 lbs, restrictor tightens to 58mm FRP.

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)

neutralHP Volkswagen Golf and Jetta 85-92 track correction: front 1537mm (60.5in), rear 1529mm (60.2in).

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)

neutralT2 Subaru Impreza WRX STi (03-07) and (08-11) expiration notes removed.

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)

fasterT2 Ford Mustang 5.0L gets 100 lb weight reduction with 4-piston Brembo brakes and 355mm rotors; EcoBoost brake note removed.

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)

fasterHP Sprite and Midget 1275cc and 1098cc Level 2 compression ratio raised to 12.0:1.

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)

neutralEP Mazda Miata front and rear track widths increased to 1516/1534 mm (59.7/60.4 in.) across all generations.

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)

neutralT2 Spec Corvette now allows 295 R compound DOT tires as alternative to Nankang NS-2R.

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)

neutralT2 and T3 Mustang spec lines remove redundant driveshaft alternate/aluminum allowance wording.

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.~~"

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)

fasterT2 Chevrolet Corvette C6 LS3 restrictor increases from 53mm to 56mm flat plate.

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)

neutralT2, T3, T4 fuel cell installations may remove charcoal canisters, emissions valves, and sensors.

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)

slowerEP Triumph GT6 switches to three Weber 40 DCOE carbs with 28mm chokes, weight rises 50 lbs to 1990.

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)

neutralT2, T3, T4 brake component wording clarified: 2-piece rotors allowed in T2 within 5% OE diameter, T3 within 2% OEM diameter.

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."

2024-12-01 T2 Evaporative emissions systems

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

neutralT2, T3, T4 fuel cell cars may remove charcoal canisters, emissions valves, and sensors.

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 T2 Move Spec Boxster to T4

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

neutralPorsche Spec Boxster moves to T4, minimum weight 2750 lbs, requires 3 Super Tour events before Runoffs eligibility.

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)

fasterT2 Chevrolet Corvette C6 Coupe/Grand Sport wheels widened to 18×11 or 19×13.

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)

neutralT4 BMW 320i 14-15 Spec Line expires 12/31/24 removed; Turner Motorsports intercooler #024703TMS02 allowed.

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)

neutralCadillac CTS 02-07 3.6L classified in T3.

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)

unclearT2 Corvette C5 Z06 restrictor split by engine: LS1 59mm, LS2 63mm, LS3 56mm FPR.

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)

neutralT2 Chevrolet Corvette Z06 (06-12) Spec Line deleted entirely.

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)

fasterEP BMW 325i/is E30 (84-91) weight reduced 50–52 lbs across three spec lines to 2150, 2204, 2258.

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)

fasterT2 Ford Mustang GT 5.0L (11-14) weight reduced from 3575 to 3525 lbs.

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)

neutralT2, T3, T4 remove nine, nine, and thirty-six expired spec lines respectively, effective 2025-01-01.

In T2, Effective 1/1/2025, delete for following Spec Lines in their entirety:
"~~Acura TL SHAWD (10-13)~~
~~Audi S4 (12-14)~~
~~Audi S5 (13-14)~~
~~Audi TT RS (2018-)~~
~~Cadillac ATS-V (16-17)~~
~~Cadillac CTS-V (06-07)~~
~~Chevrolet Camaro SS (98-02)~~

Show 49 more lines

~~Honda Civic Type-R (2017-)~~
~~Saturn Sky / Convertible (07-09)~~"
In T3, Effective 1/1/2025, delete for following Spec Lines in their entirety:
"~~Audi TTS Coupe (10-11)~~
~~Cadillac ATS (2015)~~
~~Chevrolet Cobalt (05-07)~~
~~Dodge SRT-4 (03-05)~~
~~Ford Fiesta ST (2014-)~~
~~Hyundai Genesis Coupe (2010-)~~
~~Hyundai Veloster Turbo (18-21)~~
~~Mini Cooper S (2016-)~~
~~Toyota Camry (11-15)~~"
In T4, Effective 1/1/2025, delete for following Spec Lines in their entirety:
"~~Acura Integra GS-R VTEC (3 or 4 door) (94-01)~~
~~Audi A4 V-6 (96-01) / Volkswagen Passat 2.8 V6 (96-05)~~
~~Chevrolet Cobalt SS, Sport Coupe (06-10)~~
~~Chevrolet Sonic RS (2011-)~~
~~Chrysler/Dodge Neon ACR SOHC (4 door) (01-02)~~
~~Dodge Dart (14-15)~~
~~Dodge/Plymouth Neon ACR SOHC/DOHC (2/4 door) (95-99)~~
~~Fiat 500 Abarth (12-14)~~
~~Ford Focus SVT (02.5-04)~~
~~Ford Focus ZX4 ST (05-06)~~
~~Ford Focus (08-11)~~
~~Ford Mustang V-6 (01-04)~~
~~Honda Accord LX & EX (03-07)~~
~~Honda Accord LX-S/EX/EX-L (08-12)~~
~~Honda Civic Coupe Si (99-00)~~
~~Honda Civic SI (02-03)~~
~~Hyundai Elantra GLS (11-12)~~
~~Hyundai Tiburon V-6 (03-08)~~
~~Hyundai Veloster Turbo/ R-Spec (14-15)~~
~~Kia Forte Koup and Sedan LX/EX (10-13)~~
~~Kia Forte Koup and Sedan SX (10-13~~
~~Kia Forte Koup (14-15)~~
~~Mazda Protégé ES (2000)~~
~~Mazda Protégé 5 (02-03)~~
~~Mazda6 s (03-07)~~
~~Mitsubishi Eclipse GT (00-05)~~
~~Nissan Sentra SER (02-03)~~
~~Pontiac Firebird V-6 (96-02)~~
~~Scion tC (03-07)~~
~~Subaru Impreza (non-turbo) (04-06)~~
~~Toyota Celica GT (00-05)~~
~~Toyota Celica GTS/GT (00-05)~~
~~Volkswagen Golf TDI (2010)~~
~~Volkswagen Passat (12-14)~~
~~Volkswgen Passat TDI (12-14)~~
~~Volkswgen Passat 1.8T (2014-)~~"

2025-01-01 T2 Spec Corvette Line Clarification.

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

neutralT2 Spec Corvette clarifies braking, tires, cooling, suspension, and Spec+ upgrades; SC-3200, SC+-3300 lbs.

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."

2025-02-01 T2 Mustang Update backdate

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

unclearT2 Mustang GT 5.0L combines 2015-17 and 2018-23 with different restrictors: 63mm for Gen 2, 60mm for Gen 3.

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: 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)

slowerT2 Chevrolet Camaro 1LE gains 100 lbs to 3600, restrictor increases to 62mm FPR.

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)

neutralT2 BMW M235iR (-2016) now permits oil cooler, radiator per touring rules, and silicone charge pipe.

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)

neutralFord SCCA Club Spec Mustang classified T3 at 3350 lbs with driver; Mazda SCCA Club Spec MX-5 classified T4 at 2500 lbs with driver.

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.

2025-02-01 P Correct text in engine table notes

#37606 from Club Racing Board · Rule change · TB 25-02 (2025-02 Fastrack)

neutralPrototype Staudacher and unrestricted engine notes corrected for minimum weight wording.

In Prototype Engine Table, Spec Line B, change the notes as follows:
"Staudacher cars may run 950 lb ~~min. wt.~~ minimum weight with 38.5mm flat plate intake restrictor."
In Prototype Engine Table, Spec Line D, change the notes as follows:
"No restrictor required at 1150 lb ~~min. wt.~~ minimum weight."

2025-02-01 P Update Prototype class designation

#37653 from Club Racing Board · Rule change · TB 25-02 (2025-02 Fastrack)

neutralPrototype class renamed from P1 to P, affecting designation throughout rules with no performance changes.

In Categories and Classes, GCR section 9.1, change as follows:
"9.1.8. SPORTS RACING CATEGORY CLASSES
A Sports Racing (ASR) Regional Class
Prototype 1 (P1)"
In Homologation Requirements, GCR section 9.2.2, change as follows:
"All Formula, Sports Racing, ~~and~~ P1, and P2 cars must be constructed in strict accordance with the rules and regulations
contained in the current GCR unless specifically excepted."
In Non-Metallic Wheel/Chassis Construction, GCR section 9.3.37, change as follows:

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"Non-metallic wheel construction is prohibited. Non-metallic chassis construction is prohibited, except in ASR, P1, FS and FA."
In Appendix B, GCR section 1.4.2.G, change as follows:
"It is preferable not to combine GT1, AS, T1, T2, T3, and STU with P1, P2, SRF, FP, HP, or GTL."
In Appendix C, GCR section 2.6.G, change as follows:
"A 14 or 15 year-old must complete his first SCCA driver school in a car not classed in GT1, GT2, FA, F~~B, F~~ S, ITR, ASR, P1, P2, or
T1."
In Appendix E, section 1, change as follows:
"Depending on the length and banking of the oval course being used, it is recommended that Regions consider restricting the
faster classes (GT1, FA, and P 1) from competition at oval track events."
In Sports Racing Category, GCR section 9.1.8.1, change as follows:
"The SCCA Sports Racing Category shall be for automobiles which are designed and constructed for road racing competition,
offering provisions for a driver and passenger, or a driver alone (single-seater). They shall conform to the following
requirements. Sports Racers Cars except SRF & SRF3 homologated prior to 1-1-2014 are eligible to compete as P1 or P2 as long
as they meet applicable class rules,; no re-homologation is required."
"Single seat Formula car chassis (Ex.: FA, FC, FF, FV) fitted with enclosed bodies (as specified in these rules) may run in a Sports
Racing/Prototype Class (ASR, P 1, P2) provided they comply with the requirements of the Classification Specification and GCR
Section 9."
In Sports Racing Category, GCR section 9.1.8.2, change as follows:
"In an effort to control shock/damper technology and cost to a level reasonable for Road Racing, in ASR, P1, and P2, any fluid
dampers are allowed with the following restrictions:"

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

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

slowerEP BMW Z3 2.5L requires 52mm flat plate intake restrictor; Z3 2.8L 55mm; 328i/is E36 58mm; 328i/ci E46 58mm; 325i/is E46 56mm; 325i/is E36 56mm; 325is M-Technic 56mm.

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."

Cal Club 2025 → Cal Club 2026 2025-02-22 to 2026-02-21

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

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

slowerEP BMW Z3 and 3-series models get smaller intake restrictors: Z3 2.5L to 52mm, Z3 2.8L to 55mm, 328i to 58mm, 325i to 56mm.

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)

neutralEP, FP, HP: interior or exterior mirrors meeting rule 9.3.36 now permitted.

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)

slowerT2 BMW M2 CS Cup requires Red power stick #8324085 instead of Purple #8324089; Corvette C5 Z06 restrictor reduces to 58mm from 59mm.

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)

fasterEP Honda S2000 1997cc base loses 75 lbs to 2375; 2157cc base loses 60 lbs to 2450.

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)

fasterEP Mazda MX-5/Miata 99-05 minimum weight drops to 2100 lbs, 2153 lbs with power adder, 2205 lbs with two adders.

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)

neutralFord Mustang Challenge Darkhorse R newly classified in T2 with 58 mm restrictor, 3775 lbs minimum weight.

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)

neutralT2 350Z (03-08) removes detailed OEM part numbers and consolidates permitted modifications into simplified allowance list.

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."

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

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

neutralChevrolet Spark 16-22 classified HP Pre at 1850 lbs minimum weight, fuel injected, 1399 cc.

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)

fasterHP Ford Festiva 88-93 minimum weight drops to 1600 lbs, variants to 1640 and 1680 lbs; compression ratio raised to 11.0:1.

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)

fasterT2 C6 Corvette LS2 restrictor increases from 63mm to 67mm FPR.

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

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)

fasterT2 Nissan 370Z max wheel size increases to 19 x 10.5 inches; mid link replacement for true coil overs now permitted.

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

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STOPTECH parts are allowed with a 50 Lb penalty: #83.488.6800.51 front, 83.657.0057.51 rear."

2025-05-01 P Add missing punctuation marks

#38150 from Club Racing Board · Rule change · TB 25-05 (2025-05 Fastrack)

neutralClass P adds clarification notes on restrictor requirements, throttle bodies, Mazda 12A engine spec, and P2 auto-based engine rules.

In P Engine Table, Spec Line D notes, add the following:
"No restrictor required at 1150 lbs. minimum weight."
In P Engine Table, Spec Line G notes, add the following:
"Group CN non-composite chassis with Honda K20A-FD2 may use unrestricted individual throttle bodies at 1500 lbs. minimum
weight."
In P Table 1, Beasley B2 spec line notes, add the following:
"Engine must be Mazda 12A rotary with 40.5mm venturi. Car must comply with all other Prototype requirements."
In P Table 1, P2 cars built to 2000cc auto-based specification spec line notes, add the following:

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"Car must comply with all other P2 rules applicable to cars using stock production-based four-cylinder automotive engines.
Note: Competitors are also free to modify their cars to comply with the general Prototype rules and Engine Table Spec Line H
instead."

2025-05-01 T2 T2 Cadillac tire

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

fasterT2 Cadillac CT4-V Blackwing maximum tire size increases from 295 to 315.

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)

fasterHP Fiat X-1/9 base weights reduced 50–53 lbs across 1300 and 1500 spec lines.

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)

slowerEP BMW Z4 03-05 restricted to 52mm flat plate intake restrictor.

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)

fasterEP Fiat 124 Spider 1600 & 2000 weight drops 50 lbs to 2000; carburetors gain 2mm chokes to 36mm.

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)

neutralT2, T3, T4 Spec Lines table header changed from T2 to ET.

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)

unclearBMW M2 CS Cup 2020 must run Red power stick part #8324085, not Purple #8324089.

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."

2025-08-01 T2 Fix brake allowance supersessions.

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

slowerT2 Chevrolet Corvette C5 Z06 and C6 brake allowances clarified; stock calipers and rotors only for C5, specific sizes for C6.

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 T2 C5 Corvette correction

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

slowerT2 Chevrolet Corvette C5 LS1 restrictor reduced from 59mm to 58mm FPR.

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

2025-08-01 P RM 25-05 - Prototype Engine Table A, 2 Cycle Restrictor Change

#38929 from Club Racing Board · Rule change · TB 25-09 (2025-09 Fastrack)

slowerPrototype Engine Table A 2-cycle restrictor reduces from 40mm to 38mm venturi size.

Effective 8/1/25 in Prototype Engine Table, Spec Line A, change the restrictor as follows:
"~~40mm~~ 38mm Restricted Venturi Size"

2025-09-01 P 13B Rotary Engine Rules Change Request

#38856 from Jason Vinkemulder · Rule change · TB 25-09 (2025-09 Fastrack)

unclearP class 13B rotary engine restrictor changes to 40mm SIR fuel injection or 41.5mm venturi carburetor.

Effective 9/1/25 in Prototype Engine Table, Spec Line K, change the restrictor as follows:
"40mm SIR with fuel injection or 41.5mm venturi with carburetor"

2025-09-01 P Add Radical Cup series Radical SR3 spec line to Table 1

#38916 from Club Racing Board · Rule change · TB 25-09 (2025-09 Fastrack)

neutralPrototype class adds Radical SR3 spec line to Table 1 effective 9/1/25.

Effective 9/1/25 in Prototype Table 1 (Spec Line Cars), add the following:

2025-09-01 P Clarify spec line cars language

#38943 from Club Racing Board · Rule change · TB 25-09 (2025-09 Fastrack)

neutralPrototype P2 cars may now run P2 spec or modified Prototype spec in Prototype class; clarified language and added Radical Cup series table.

Effective 9/1/25, in Prototype, GCR section 9.1.8.B.K, change as follows:
"~~P2 cars may compete in either the Prototype class or the P2 class but must participate in the Prototype class to the extent~~
~~necessary to qualify for an invitation to the Runoffs in Prototype.~~ P2 cars may be modified to comply with the general Prototype
rules and Prototype Engine Table or may continue to run in P2 specification in the Prototype class as permitted in Table 1 below."
Table 1 (Spec Line Cars)

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

2025-10-01 EP HP Plymouth Arrow spec omission

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

neutralHP Plymouth Arrow transmission max speeds clarified to 4 or 5.

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)

neutralEP, FP, HP wheel diameter added to Appendix G as absolute maximum specification.

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)

neutralEP, FP, HP throttle body inside dimensions must remain stock with +/-.25mm tolerance; butterfly dimensions stock in FP, HP only.

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)

fasterEP Nissan 280Z minimum weight reduced from 2560 to 2400 lbs.

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)

fasterEP Mazda MX-5 1.8L 90-97 weight reduced to 2125 lbs from 2150 lbs.

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)

fasterHP Austin-Healey Sprite/Midget 1098cc minimum weight drops 80 lbs to 1550.

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)

slowerHP Volvo 142/142E gains compression ratio limit 12.0:1 and valve lift limit .425".

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)

slowerHP Mini Cooper 07-15 valve lift reduced to .390", from .450".

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)

neutralFP and HP Volkswagen Rabbit descriptions updated: Convertible changed to Cabriolet in FP; Cabriolet added to three HP engine variants.

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)

neutralEP, FP, HP: rear drum brake to disc conversion clarified; rotors solid, diameter limited to largest front rotor permitted.

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. N~~ote 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~~

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~~from converting to rear disc brakes under this rule.~~
3. 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
as stock from converting to rear disc brakes under this rule."

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)

neutralEP Ford Mustang (94-98) fuel injected throttle body inside diameter specified at 60.

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)

neutralT3 and T4 Mazda MX-5 Miata models add approved gear kit PT#-0000-02-6100 to notes.

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)

neutralT4 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.

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.

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

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

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.

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: 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)

slowerT2 Spec Corvette rev limit set to 7100 rpm.

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)

fasterT2 Ford Mustang Boss 302 restrictor opens 56mm to 63mm; Mustang GT 5.0L 60mm to 65mm.

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)

fasterT2 Chevrolet Camaro SS/1LE (10-15) minimum weight reduced to 3575 lbs.

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)

unclearEP Triumph TR2-TR4A allows 5-speed gearbox without overdrive; removes Weber carb and weight specification.

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)

slowerEP BMW Z3 2.5L restrictor reduced 52mm to 50mm, weight increased to 2550 lbs base; five other BMW models get smaller restrictors.

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"

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In EP Spec Lines, BMW Z3 2.5L, change Weight as follows:
"~~2500~~ 2550
*~~2563~~ 2614
**~~2625~~ 2678"

2025-12-01 T2 Adjust T2 Darkhorse R

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

slowerT2 Ford Mustang Challenge Dark Horse R (2024-) weight increases to 3825 lbs, displacement grows to 5038cc, tire width expands to 315.

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)

neutralEP BMW 325i/is E30 throttle body specified as 60mm in fuel injection notes.

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)

neutralT2, T3, T4 cars may relocate under-dash electronics and fuse boxes for access after roll cage installation.

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)

fasterT2 Cadillac CT4-V Blackwing minimum weight drops 50 lbs to 3750.

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)

fasterT2 C6 Corvette LS2 restrictor increases from 67mm to 80mm FPR.

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 P Request to Continue to Allow Carbon Brakes

#39476 from Jeffrey Lederman · Rule change · TB 26-01 (2026-01 Fastrack)

neutralPrototype carbon-carbon and carbon-ceramic brake rotors now permitted instead of prohibited.

In Prototype, GCR section 9.1.8.B.F.2, change as follows:
"Brake calipers may be ferrous or aluminum alloy. ~~Effective 1/1/2026, carbon-carbon and carbon-ceramic brake rotors are~~
~~prohibited and rotors must be ferrous.~~ Brake rotor material is unrestricted."

2026-01-01 T2 T2 Tire Sizing

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

fasterT2 Dodge Viper SRT10 coupe weight reduced from 3675 lbs to 3650 lbs.

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)

unclearT2 Ford Mustang GT 5.0L 15-23 permits Ford Track/Performance Package aero parts M-16600-FP and M-16601-MPP.

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)

neutralT4 Performance now permits 1-piece alternative rotors matching spec line sizes; alternate brake kits allowed same.

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."

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

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

neutralBMW 435i (2014-2017) added to T2 with 40mm restrictor, 3400 lbs minimum weight.

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)

neutralNissan Z including Nismo added to T2 with 38mm restrictor, 3600 lbs base and 3650 lbs Nismo.

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)

fasterT2-T4 adjustable toe links now allow performance alternative bushings and spherical bearings, previously prohibited except in specified examples.

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."

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)

neutralT2-TCR adds Link & Co 03 TCR and MG6 TCR, both 3000 lbs, 90% power, 275 max tire width.

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

What the rules allowed changed as listed; this does not say what any particular car ran.