BoP Lab / Buttonwillow Raceway Park

T1 + T4 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	BMW M3	Ian Barberi	T1	74	1:46.465 B-Q2	1:46.066	1:46.465 B-Q2	1:47.434 B-R1	1:47.873 B-R1	+0.605 B-R1	114.9 B-Q2, B-R2	28.992 B-Q2	30.811 B-P	46.263 B-Q1
2	BMW M4 GT4	Drew Delmonico	T1	43	1:47.084 B-Q1	1:46.316	1:47.084 B-Q1	1:47.467 B-R1	1:48.228 B-R1	+1.310 B-R1	161.4 B-P	29.150 B-Q2	30.850 B-R1	46.316 B-P
3	Mazda MX-5	Oscar Jackson	T4	161, 161x	1:58.339 B-Q1	1:58.339	1:58.339 B-Q1	1:59.922 B-R1	2:01.033 B-R1	+2.860 B-R1	105.5 B-Q1	32.394 B-Q1	34.071 B-Q1	51.874 B-Q1
4	Pontiac GTO	Ed Gless	T1	43	1:59.123 A-R1	1:58.340	1:59.760 A-Q2	1:59.123 A-R1	2:00.018 A-R2	+1.331 A-R2	120.7 A-Q1	32.383 A-R1	34.587 A-R2	51.370 A-R2
5	Ford Mustang	Pratt Cole	T1	8	1:59.261 B-R2	1:58.862		1:59.261 B-R2	2:01.195 B-R2	+2.608 B-R2	98.6 B-R2	32.624 B-R2	34.661 B-R2	51.577 B-R2
6	Toyota FRS	Izzy Sanchez	T4	78	2:01.157 A-R1	2:00.448	2:01.678 A-Q2	2:01.157 A-R1	2:02.239 A-R2	+1.404 A-R2	135.5 A-Q2	32.955 B-P	34.751 A-R1	52.742 B-P
7	Scion FR-S	Tony Kiratsous	T4	35, 36	2:01.843 B-Q1	2:01.786	2:01.843 B-Q1	2:03.865 A-R2	2:04.289 A-R2	+0.751 A-R2	133.6 A-R2	32.895 B-Q1	34.958 B-Q1	53.933 B-Q1
8	Mazda Miata	Kristina Etherington	T4	96	2:03.007 A-R2	2:02.646	2:03.241 A-Q2	2:03.007 A-R2	2:03.776 A-R2	+1.019 A-R2	128.1 A-Q2	33.464 A-Q2	35.459 A-R1	53.723 A-R2
9	Porsche Boxster	Lynne Griffiths	T4	31	2:05.833 B-Q1	2:05.614	2:05.833 B-Q1	2:07.226 B-R1	2:08.659 B-R1	+3.459 B-R1	122.0 A-Q1	33.699 B-R1	36.036 B-Q1	55.879 B-Q1
10	Mazda RX-8	Steven Kiratsous	T4	7	2:05.858 B-R2	2:04.886	2:06.604 B-Q2	2:05.858 B-R2	2:06.907 B-R2	+1.122 B-R2	105.7 B-R2	33.416 B-R2	35.585 B-R2	55.885 B-R2
11	Mazda Miata	Kayla Etherington	T4	16	2:07.618 A-Q2	2:07.257	2:07.618 A-Q2	2:08.317 A-R2	2:08.911 A-R2	+1.372 A-R2	124.3 A-Q2	34.878 A-R2	36.704 A-Q2	55.675 A-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
BMW M3	T1	1	1:46.465Ian Barberi	1:46.465Ian Barberi	1:47.434Ian Barberi	114.9Ian Barberi	28.992Ian Barberi	30.811Ian Barberi	46.263Ian Barberi
BMW M4 GT4	T1	1	1:47.084Drew Delmonico	1:47.084Drew Delmonico	1:47.467Drew Delmonico	161.4Drew Delmonico	29.150Drew Delmonico	30.850Drew Delmonico	46.316Drew Delmonico
Mazda MX-5	T4	1	1:58.339Oscar Jackson	1:58.339Oscar Jackson	1:59.922Oscar Jackson	105.5Oscar Jackson	32.394Oscar Jackson	34.071Oscar Jackson	51.874Oscar Jackson
Pontiac GTO	T1	1	1:59.123Ed Gless	1:59.760Ed Gless	1:59.123Ed Gless	120.7Ed Gless	32.383Ed Gless	34.587Ed Gless	51.370Ed Gless
Ford Mustang	T1	1	1:59.261Pratt Cole		1:59.261Pratt Cole	98.6Pratt Cole	32.624Pratt Cole	34.661Pratt Cole	51.577Pratt Cole
Toyota FRS	T4	1	2:01.157Izzy Sanchez	2:01.678Izzy Sanchez	2:01.157Izzy Sanchez	135.5Izzy Sanchez	32.955Izzy Sanchez	34.751Izzy Sanchez	52.742Izzy Sanchez
Scion FR-S	T4	1	2:01.843Tony Kiratsous	2:01.843Tony Kiratsous	2:03.865Tony Kiratsous	133.6Tony Kiratsous	32.895Tony Kiratsous	34.958Tony Kiratsous	53.933Tony Kiratsous
Mazda Miata	T4	2	2:03.007Kristina Etherington	2:03.241Kristina Etherington	2:03.007Kristina Etherington	128.1Kristina Etherington	33.464Kristina Etherington	35.459Kristina Etherington	53.723Kristina Etherington
Porsche Boxster	T4	1	2:05.833Lynne Griffiths	2:05.833Lynne Griffiths	2:07.226Lynne Griffiths	122.0Lynne Griffiths	33.699Lynne Griffiths	36.036Lynne Griffiths	55.879Lynne Griffiths
Mazda RX-8	T4	1	2:05.858Steven Kiratsous	2:06.604Steven Kiratsous	2:05.858Steven Kiratsous	105.7Steven Kiratsous	33.416Steven Kiratsous	35.585Steven Kiratsous	55.885Steven Kiratsous

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 T4 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 T1 9.1.9.1 T1 new category item/ line 26 rule to expire Jan 1 2023

#35411 from Geoffrey Hegel · Rule change · TB 24-03 (2024-03 Fastrack)

neutralPontiac GTO 2006-2009 LS1 added to T1 as Spec Line 1590, 5700 cc, 3400 lbs minimum.

In T1 Spec Lines, classify Pontiac GTO 2006-2009 as Spec Line Number 1590 as follows:

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

2024-03-01 T4 Allow any 400lb rear spring in the RX8

#35433 from Raymond Blethen · Rule change · TB 24-03 (2024-03 Fastrack)

neutralT4 Mazda RX-8 rear spring opens to any 400lb, was specific part numbers only.

In T4 Spec Lines, Mazda RX-8 Base/R3/Sport/ GT (04-12), change Notes as follows:
"~~Mazda Motorsports- 0000- 04-9700-08 or Eibach- 0800.250.0700 (R) Mazda Motorsports- 0000-04-9400-07 or Eibach~~
~~0700.250.0400, and helper 0000-04-9926 allowed.~~ Springs allowed 700lb (f), 400(r)."

2024-03-01 T4 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”

2024-04-01 T1 Honda S2000

#35582 from Touring Committee · Rule change · TB 24-04 (2024-04 Fastrack)

neutralT1 Honda S2000 classified with 2400 lb minimum weight, 2950 cc displacement, 4.75" supercharger pulley.

In T1 Spec Lines, classify Honda S2000 as follows:

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

2024-04-01 T4 Corrections to T4 RX8 Spec line

#35767 from Touring Committee · Rule change · TB 24-04 (2024-04 Fastrack)

neutralT4 Mazda RX-8 allows Mazdaspeed radiator, coil spring kit, OE rear spoiler, front air dam, springs to 700 lb front/400 lb rear, oil metering pump bypass, sway bars to 32 mm front/19 mm rear.

In T4 Spec Lines, Mazda RX-8 Base/R3/Sport/ GT (04-12), change Notes as follows:
"Mazdaspeed radiator #0000-01-8501 allowed. Mazdaspeed coil spring kit #QSEA-34-01Z allowed. OE Rear spoiler allowed
#F151-V4-920F. OE front air dam allowed #F151-V4-900f-BB. Springs allowed 700lb (f) max, 400(r) max. Oil metering pump may
be bypassed. Alternate sway bars allowed max 32mm (f) 19mm (r)."

2024-05-01 T4 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 T4 2023 ND2 Miata Classification and Allowances

#35837 from Coyote Black · Rule change · TB 24-05 (2024-05 Fastrack)

slowerT4 Mazda MX5 Miata/Club/RF year range extended to 2024, suspension package permitted with 100 lbs weight increase.

In T4 Spec Lines, Mazda MX5 Miata/Club/ RF (19-21), change Year as follows:
"(19-21 24)"
In T4 Spec Lines, Mazda MX5 Miata/Club/ RF (19-21), add to Notes as follows:
"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."

2024-05-01 T4 Errors and Omissions for 06-09 VW Rabbit Rotor

#35851 from Andrew Burke · Rule change · TB 24-05 (2024-05 Fastrack)

fasterT4 Volkswagen Rabbit 2.5 (06-09) front brakes increase from 228 to 288 vented disc.

In T4 Spec Lines, Volkswagen Rabbit 2.5 (06-09), change Brakes as follows:
"(F) ~~228~~ 288 Vented Disc (R) 260 Solid Disc"

2024-05-01 T4 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."

2024-05-01 T1 Please Expedite classing the C63 Mercedes

#35987 from Touring Committee · Rule change · TB 24-05 (2024-05 Fastrack)

neutralMercedes AMG-C63 S (2023) classified in T1 with 4000 lbs minimum weight and 3700 restrictor.

In T1 Spec Lines, classify Mercedes AMG-C63 S (2023) as follows:

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

2024-05-01 T4 GCR ERROR - letter not properly applied to GCR

#35999 from Touring Committee · Rule change · TB 24-05 (2024-05 Fastrack)

fasterT4 Mazda MX-5 Miata/Club 16-18 removes differential stock requirement, allows up to 500lb front and 300lb rear springs.

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. ~~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. ~~Suspension package permitted with a 100 lbs. weight increase that includes the following parts: front springs #0000-~~
~~04-9700-08, rear springs #0000-04-9400-07, helper springs #0000-04-HLPR-EB (optional)~~. Up to 500lb front and 300lb rear
springs allowed. Mazda Motorsports Header part #0000-06-5410 allowed. Mazda tower brace 0000-04-5626 allowed."

Applies to Mazda MX-5 on this page: Oscar Jackson

Applies to Mazda Miata on this page: Kristina Etherington, Kayla Etherington

2024-06-01 T4 Allow OEM Front Spoiler 06-08 Miata in T4

#35941 from David Mead · Rule change · TB 24-06 (2024-06 Fastrack)

fasterT4 Mazda MX-5 Club 06-15 now permits OEM front spoiler NF51-V4-900F.

In T4 Spec Lines, Mazda MX-5 / Club Model (06-15), add to Notes the following: "Front
spoiler permitted (NF51-V4-900F)."

Applies to Mazda MX-5 on this page: Oscar Jackson

2024-06-01 T4 T4 Mustang Weight Reduction In T4 Spec

#36051 from Scotty B White · Rule change · TB 24-06 (2024-06 Fastrack)

fasterT4 Ford Mustang V6 (05-10) weight reduced 50 lbs to 3225.

Lines, Ford Mustang V6 (05-10), change as follows:
Weight: "~~3275~~ 3225"
Notes: "14” Brembo Brake Kit#M-2300-S permitted."

2024-06-01 T4 R53 Mini Cooper S spec line request In

#36056 from Manvinder Singh · Rule change · TB 24-06 (2024-06 Fastrack)

fasterT4 Mini Cooper S 02-04 and 05-06 now allow Milltek exhaust manifold #SSXM459 and 25mm rear sway bar.

T4 Spec Lines, Mini Cooper S (02-04), add to Notes the following:
"Milltek exhaust manifold #SSXM459 allowed. 25mm rear sway bar allowed."
T4 Spec Lines, Mini Cooper S (05-06), add to Notes the following:
"Milltek exhaust manifold #SSXM459 allowed. 25mm rear sway bar allowed."

2024-07-01 T4 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."

2024-07-01 T4 Homologation of car to T4

#36030 from Patrick E Morgan · Rule change · TB 24-07 (2024-07 Fastrack)

neutralMercedes C300 4Matic 2008-2011 homologated to T4 at 3,725 lbs with 18x8.5 wheels, 245 max tires, 3.27 final drive.

In T4 Spec Lines, Mercedes C300 4Matic (2008-2011), classify as follows:

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

2024-07-01 T4 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."

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

2024-07-01 T4 MINI Cooper S Spec Lines Corrections.

#36086 from David Oliveira · Rule change · TB 24-07 (2024-07 Fastrack)

neutralT4 Mini Cooper S (02-04) deleted; (05-06) model year corrected to R53; (07-13) R56 simplified specs; (2014-2023) added with spring rates.

In T4 Spec Lines, Mini Cooper S (02-04), delete spec line in its entirety.
In T4 Spec Lines, Mini Cooper S (05-06), change Model as follows:
"Mini Cooper S R53 (0205-06)"
In T4 Spec Lines, Mini Cooper S (07-13), change Model and Notes as follows:
"Mini Cooper S R56 (07-13)"
Notes: "~~The following items must remain stock: shock/struts (including mounts), original wheels, and transmission~~
~~differential - unless specified below.~~ Convertible model not allowed. ~~Factory optional limited slip differential allowed.~~
~~JCW struts (F) 31 31 6 768 410 (R)33 52 6 768 412, springs (F)31 33 6 768 415 (R)33 53 6 768 418. May de-camber~~

Show 8 more lines

~~wheels by the use of slotted adjusters at the top of the strut mounting plates. They shall be located on the existing~~
~~chassis structure, utilizing the manufacturers original bolt holes and may not serve as reinforcement for that~~
~~structure.~~ Any spring up to a maximum spring rate of 500 lbs. front and 800 lbs. rear may be used. Wheels conforming
to B-spec rules are permitted."
In T4 Spec Lines, Mini Cooper S (2016-), change Model and add to Notes as follows:
"Mini Cooper S (2014~~2016~~-2023)"
Notes: "Convertible model not allowed. Any spring up to a maximum spring rate of 500lbs. front and 800lbs. rear may
be used."

2024-07-01 T4 Allow Removal of Sound Tubes

#36130 from Coyote Black · Rule change · TB 24-07 (2024-07 Fastrack)

fasterT4 OEM intake chambers, resonators and acoustic devices may be removed if ports sealed and before restrictor.

In GCR Section 9.1.9.2.D.1.b., add the following:
"2. OEM intake- Chambers, resonators and acoustic devices may be removed, provided; that their ports are located
prior to any required restrictor, their ports are completely sealed, and that the part serves no other purpose."

2024-07-01 T4 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 T4 T4 Camaro V6 weight reduction

#36232 from Ted Warning · Rule change · TB 24-08 (2024-08 Fastrack)

fasterT4 Chevrolet Camaro V-6 (96-02) weight reduced from 3250 lbs to 3150 lbs.

In T4 Spec Lines, Chevrolet Camaro V-6 (96-02), change weight as follows:
~~"3250~~ 3150"

2024-08-01 T4 BOP adjustment for ND MX5s

#36345 from Touring Committee · Rule change · TB 24-08 (2024-08 Fastrack)

fasterT4 Mazda MX-5 Miata/Club 16-18 drops 50 lbs to 2650; 19-24 RF drops 50 lbs to 2750.

In T4 Spec Lines, change Weight (lbs) as follows:
Mazda MX-5 Miata/Club (16-18): "~~2700~~ 2650"
Mazda MX5 Miata/Club/ RF (19-24): "~~2800~~ 2750"

2024-11-01 T4 Bop Request 06-11 Honda Civic Si

#37013 from Mathew Milford · Rule change · TB 24-11 (2024-11 Fastrack)

neutralT4 Honda Civic Si 06-11 permitted to use LSD per category rules.

In T4 Spec Lines, Honda Civic Si (06-11), add to Notes the following:
"LSD is permitted according to category rules."

2024-12-01 T1 Changes to T1 Tires for GT4 and Other Cars

#35383 from Andrew Aquilante · Rule change · TB 24-12 (2024-12 Fastrack)

unclearT1 GT4 tire sizes adjusted across ten cars: most non-DOT rear to 305/660, Audi and McLaren 305/645, Camaro and Mustang 305/680.

In T1 GT4 Spec Lines, change Tire Size as follows:
Aston Martin Vantage AMR GT4 4010: "315 DOT, 305/660 Non-DOT"
Audi R8 GT4 - Spec Line #4020: "315 DOT, 305/645 Non-DOT"
BMW M4 GT4 - Spec Line #4030: "315 DOT, 305/660 Non-DOT"
Chevrolet Camaro GT4-R- Spec Line #4035: "315 DOT, 305/680 Non-DOT"
Ford Mustang GT4 - Spec Line #4040: "315 DOT, 315/680 Non-DOT"
Mclaren 570S GT4 - Spec Line #4050: "315 DOT, 305/645 Non-DOT"
Mercedes AMG GT4 - Spec Line #4060: "315 DOT, 305/660 Non-DOT"

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Porsche 718 Cayman GT4 CS MR - Spec Line #4070: "315 DOT, 305/660 Non-DOT"
Porsche 718 GT4 RS Clubsport - Spec Line #4080: "315 DOT, 305/660 Non-DOT"
Toyota Supra GR GT4 - Spec Line #4090: "315 DOT, 305/660 Non-DOT"

2024-12-01 T1 G82 M4 GT4 inclusion in T1

#35864 from Denny Stripling · Rule change · TB 24-12 (2024-12 Fastrack)

neutralBMW M4 GT4 (G82) added to T1 GT4 at 3525 lbs minimum weight with Red power stick control.

In T1 GT4 Spec Lines, SL#4030, change as follows:
Model: "BMW M4 GT4 (F82)"
Performance Control: "~~Gold power stick~~ Red power stick"
In T1 GT4 Spec Lines, classify BMW M4 GT4 (G82) as follows:

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

2024-12-01 T4 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 T1 Alt. Clutch Allowance

#36606 from Hugh Stewart · Rule change · TB 24-12 (2024-12 Fastrack)

neutralT1 Spec Lines now permits 5.5 inch clutch in Engine Notes.

In T1 Spec Lines, SL# 1050, change add to Engine Notes the following:
"5.5 inch clutch permitted."

2024-12-01 T4 R53 Mini Cooper S Weight Reduction Request

#36612 from Manvinder Singh · Rule change · TB 24-12 (2024-12 Fastrack)

fasterT4 Mini Cooper S R53 now allows Alta 15% Pulley #AMPENG20X.

In T4 Spec Lines, Mini Cooper S R53 (02-06), add to Notes as follows:
"Alta 15% Pulley #AMPENG20X allowed."

2024-12-01 T1 BOP Changes Need Updates

#36667 from Joe Rainey · Rule change · TB 24-12 (2024-12 Fastrack)

fasterT1 GT4 Spec Line 4020 restrictor opens from 44mm to 45mm, minimum weight drops to 3400 lbs.

In T1 GT4 Spec Lines, Spec Line 4020, change as follows:
Performance Control: Power level 2020, ~~44mm~~ 45mm SRO compliant restrictor"
Min. Weight with driver (LBS): "~~3550~~ 3400"

2024-12-01 T4 Allowable Wheel Offset

#36855 from Robert Maples · Rule change · TB 24-12 (2024-12 Fastrack)

neutralT4 removes restriction on aftermarket wheel weight minimum of 15 lbs.

In GCR Section 9.1.9.2.D.7. Wheels and Tires, change as follows:
"a. Wheels
1. Any type wheel suitable for competition may be used, provided:
a. Any wheel not exceeding the specified diameter and rim width on the vehicle’s specification line may be used. Each wheel,
measured without weights, must weigh at least 15 lbs.
b. Wheels are permitted any offset provided the tire tread (that portion of the tire that contacts the ground) does not protrude
beyond the fender opening when viewed from 9.1.9.2.Touring (T2-T4) Category Specifications GCR - 660 the top perpendicular
to the ground, unless specified differently on the individual spec line for that car. To determine compliance the vehicle should be

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rolled through a powdered substance, as raced with driver, in order to indicate the tire tread contact patch under static
conditions. When a maximum tire size is listed on a vehicle’s specification line, aspect ratio is open and any tire may be used that
does not exceed the stated maximum section width.
c. Cars equipped with lug bolts may convert to wheel studs and lug nuts.
d. Wheel studs may be replaced with longer studs as necessary to fit optional wheels. Wheel spacers may be used for purposes
of adjusting track.
~~e-T4 only: (unless specified on spec line) Any aftermarket wheel with a minimum weight of 15 lbs allowed.~~"

2024-12-01 T4 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 T4 2019-2024 Mazda 3 for T4

#37077 from Derrick Ambrose · Rule change · TB 24-12 (2024-12 Fastrack)

neutralMazda 3 (19-24) newly classified in T4 at 2850 lbs with 17×8 wheels and 245 tires.

In T4 Spec Lines, classify Mazda 3 (19-24), as follows:

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

2024-12-01 T4 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 T4 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 T1 Request Ford Performance Darkhorse R in T1

#37136 from Christopher Childs · Rule change · TB 24-12 (2024-12 Fastrack)

neutralMustang Darkhorse R added to T1 homologated cars at 3,250 lbs minimum with 305/315 tires, ineligible for Runoffs until 3 Super Tour events.

In T1-Homologated Cars Spec Line, classify Mustang Darkhorse R (Mustang Challenge) as follows:
T1 – Homologated Cars

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

2024-12-01 T4 Allow Spec MX5 upgrade kit for 2009-11 RX8 S2 Transmision

#37140 from Chris Braunlich · Rule change · TB 24-12 (2024-12 Fastrack)

neutralT3 and T4 Mazda RX-8 and MX-5 permit transmission kit #0000-02-5700.

In T4 Spec Lines, add the following to Notes:
Mazda RX-8 Base/R3/Sport/ GT (04-12): "Transmission kit # 0000-02-5700 permitted.
Mazda MX-5 / Club Model (06-15): "Transmission kit # 0000-02-5700 permitted."
In T3 Spec Lines, add the following to Notes:
Mazda MX-5 / Club Model (06-15): "Transmission kit # 0000-02-5700 permitted."
Mazda RX-8 Base/R3/Sport/ GT (04-12): "Transmission kit # 0000-02-5700 permitted."

2024-12-01 T4 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.

Applies to Porsche Boxster on this page: Lynne Griffiths

2024-12-01 T1 Car Mods for T1 Corvette under line item 1150

#37173 from Thomas Napolitano · Rule change · TB 24-12 (2024-12 Fastrack)

neutralT1 Corvette may roll or flatten wheel opening lips for tire clearance; plastic fenders may remove lips if edge thickness matches basic material.

In GCR, Section 9.1.9.1.A.2,, add the following:
"It is permitted to roll under or flatten any interior lip on the wheel opening for tire clearance. Cars with plastic/composite
fenders may remove any interior wheel opening lip, but the resulting material edge shall be no thinner than the basic fender
material thickness. Non-metallic inner fender liners may be removed. Vents may be added to fenders."

2024-12-01 T4 3.7 Mustangs to T4

#37188 from Scotty B White · Rule change · TB 24-12 (2024-12 Fastrack)

neutralFord Mustang V6 (05-14) newly classified to T4 with 50mm restrictor, 3400 lbs minimum weight.

In T4 Spec Lines, classify Ford Mustang V6 (05-14), as follows:

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

2024-12-01 T4 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 T4 MX5 2006-2015 NC Help

#37221 from Richard Mooney · Rule change · TB 24-12 (2024-12 Fastrack)

unclearUnable to summarize: rule changes specified in letter #37281, not provided.

Thank you for your letter. Please see changes in letter #37281 in current Fastrack.

2024-12-01 T4 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 T4 Civic SI in T4

#37248 from Touring Committee · Rule change · TB 24-12 (2024-12 Fastrack)

fasterT4 Honda Civic Si 06-11 minimum weight drops 50 lbs to 2900, restrictor clarified.

In T4 Spec Lines, Honda Civic Si (06-11), change as follows:
Required Restrictor: "55mm flat plate restrictor required."
Min Weight: "~~2950~~ 2900"
Notes: "~~The following items must remain stock: transmission differential - unless specified below. 55mm flat plate restrictor~~
~~required. LSD IS PERMITTED ACCORDING TO CATEGORY RULES~~"

2024-12-01 T1 Increased Bore Throttle Bodies for E46 M3 S54 Engine

#37273 from Mark Pfeffer · Rule change · TB 24-12 (2024-12 Fastrack)

fasterT1 E46 M3 S54 can now use Dinan Throttle Body #D760-3400 on 3.250L engine.

In T1 Spec Lines, E46 M3 Spec Line # 1050, add to Engine Notes the following:
"Dinan Throttle Body #D760-3400 allowed on the 3.250L."

2024-12-01 T4 2006-2015 T4 NC Mx5 spec line

#37278 from Touring Committee · Rule change · TB 24-12 (2024-12 Fastrack)

neutralT4 NC MX-5 06-15 removes SM5 suspension allowance, clarifies Mazda Motorsports LSD part number, adds weight penalty for other LSDs.

In T4 Spec Lines, Mazda MX-5 / Club Model (06-15), change Notes as follows:
"Factory bolt-in roll bar/cross member may be removed to facilitate roll cage installation. MSR option permitted. Suspension
package permitted with a 100 lbs. weight increase that includes the following parts: front spring mount PT#-0000-04-5259, front
springs #0000-04-9700-08, rear spring mount PT#-0000-04-5258, rear springs #0000-04-9400-07, helper springs #0000-04-HLPR-
EB (optional), Swaybar kit – PT#-0000-04-5306-EB that includes (front sway bar kit PT#0000-04- 5306-FT, rear sway bar kit PT#-
0000-04-5306-RR), offset front camber bushing PT#-0000-04- 5407-NC. Mazda Motorsports cold air intake part #0000-06-5150-
KT allowed. Mazda Motorsport RX8 rear Hub Conversion kit part number 0000-04-5811-KT allowed, RX8 front hubs PT# F189-33-
04X allowed. ~~The SM5 suspension (only) is allowed with a 100 lbs. weight increase~~. Allow Mazda header part numbers 0000-06-

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5407 or 0000-06-5407-NC. Any OEM or aftermarket hardtop is permitted that retains the OEM roof silhouette, including Mazda
hardtop and part #0000-07-5901- CC. Aftermarket power steering reservoir is allowed. Mazda Transmission kit part # 0000-02-
5700. Mazda Motorsports LSD ~~#3265~~ 5 0000-02-5564 permitted without penalty. Any other non-OEM limited slip differential
allowed with +50 lbs. weight penalty. Front spoiler permitted (NF51-V4-900F)."

Applies to Mazda MX-5 on this page: Oscar Jackson

2024-12-01 T4 ND MX-5 wheel allowance

#37279 from Josh Smith · Rule change · TB 24-12 (2024-12 Fastrack)

unclearT4 Mazda MX-5 Miata/Club (16-18) wheel size changes to 17 x 7.5 inches.

In T4 Spec Lines, Mazda MX-5 Miata/Club (16-18), change Wheel Size as follows:
"17 x 7.5"

Applies to Mazda MX-5 on this page: Oscar Jackson

Applies to Mazda Miata on this page: Kristina Etherington, Kayla Etherington

2024-12-01 T4 T4 BOP

#37281 from Touring Committee · Rule change · TB 24-12 (2024-12 Fastrack)

slowerT4 Mazda RX-8 gets 59mm restrictor and 3200 lbs; MX-5 Club drops to 2550 lbs.

In T4 Spec Lines, Mazda RX-8 Base/R3/Sport/ GT (04-12), change as follows:
Required Restrictor: "~~60mm~~ 59mm"
Weight: "~~3125~~ 3200"
In T4 Spec Lines, Mazda MX-5 / Club Model (06-15), change weight as follows:
"~~2600~~ 2550"

Applies to Mazda MX-5 on this page: Oscar Jackson

2024-12-01 T4 Allow 7.5

#37286 from Touring Committee · Rule change · TB 24-12 (2024-12 Fastrack)

neutralT4 Mazda MX5 Miata/Club/RF 19-24 wheel size changes to 17 x 7.5.

In T4 Spec Lines, Mazda MX5 Miata/Club/ RF (19-24), change Wheel Size as follows:
"17 x 7.5"

2025-01-01 T4 2016-2018 Mazda Miata MX5

#37085 from Nic Piekarski · Rule change · TB 25-01 (2025-01 Fastrack)

fasterT4 2016-2018 Mazda Miata MX-5 minimum weight reduced to 2575 lbs from 2650 lbs.

In T4 Spec Lines, Mazda MX-5 Miata/Club (16-18), change Min Weight as follows:
"~~2650~~ 2575"
In T4 Spec Lines, Mazda MX5 Miata/Club/ RF (19-24), add to Notes the following:
"Mazda header 0000-06-5410 allowed."

Applies to Mazda MX-5 on this page: Oscar Jackson

Applies to Mazda Miata on this page: Kristina Etherington, Kayla Etherington

2025-01-01 T4 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)~~

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

2025-02-01 T1 T1 Parity Compared to GT4

#37170 from Tony Ave · Rule change · TB 25-02 (2025-02 Fastrack)

slowerT1 Mustang gains 125 lbs to 3600, restrictor shrinks 65mm to 60mm. Corvette gains 50 lbs to 3500, restrictor shrinks 70mm to 67mm. BMW deleted.

In T1 Spec Lines, change Weight and Restrictor Required as follows:
Mustang - Spec Line 1430
Weight: "~~3475~~ 3600"
Restrictor Required: "~~65mm~~ 60mm - FPR"
Corvette Spec Line 1190
Weight: "~~3450~~ 3500"
Restrictor Required: "~~70mm~~ 67mm - Flat Plate"
In T1 Spec Lines, delete Spec Line BMW # 1190 in its entirety.

2025-02-01 T1 Clarification of Request Approval #37273

#37399 from Mark Pfeffer · Rule change · TB 25-02 (2025-02 Fastrack)

unclearT1 E46 M3 Spec Line 1050 allows VAC Motorsports throttle body VAC-TB-S54 on 3.250L engine instead of Dinan.

In T1 Spec Lines, E46 M3 Spec Line # 1050, change Engine Notes as follows:
"~~Dinan Throttle Body #D760-3400~~ VAC Motorsports #VAC-TB-S54 allowed on the 3.250L."

2025-02-01 T1 C8 Corvette Facts

#37400 from Garry Crook · Rule change · TB 25-02 (2025-02 Fastrack)

fasterT1 Chevrolet Corvette C8 (2023-23) minimum weight reduced from 3600 lbs to 3500 lbs.

In T1 Spec Lines, Chevrolet Corvette C8 (20- 23) - Includes Z51, Spec Line # 1210, change Min. Weight as follows:
"~~3600~~ 3500"

2025-02-01 T1 Camaro Gen 5 Competitive Disadvantage

#37440 from Clark Nunes · Rule change · TB 25-02 (2025-02 Fastrack)

fasterT1 Chevrolet Camaro Gen 5 restrictor increases from 75mm to 80mm flat plate.

In T1 Spec Lines, Chevrolet Camaro Gen 5 (10-15) Including SS, Z28 Spec Line 1135, change Required Restrictor as follows:
~~"75mm~~ 80mm - Flat Plate"

2025-02-01 T1 Tire Changes in the Rules for GT4

#37497 from Joe Rainey · Rule change · TB 25-02 (2025-02 Fastrack)

unclearT1 Audi R8 GT4 Spec Line #4020 maximum tyre size changes to 315 DOT, 305/645, or 30/65-18 (f), 33/68-18 (r) Non-DOT.

In T1-GT4 Spec Lines, Audi R8 GT4 Spec Line #4020, change Max Tire Size as follows:
"315 DOT, 305/645, or 30/65-18 (f), 33/68-18 (r) Non-DOT"

2025-02-01 T4 Ford Mustang V6 (05-14)

#37516 from Touring Committee · Rule change · TB 25-02 (2025-02 Fastrack)

neutralT4 Ford Mustang V6 (05-14) final drive set to 3.45, GT/CS front bumper cover permitted with front fascia.

In T4 Spec Lines, Ford Mustang V6 (05-14), change as follows:
Final drive: "3.45"
Notes: "GT/CS front bumper cover #AR3Z-17D957-BA, allowed if used with front fascia."

2025-02-01 T4 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.

Applies to Mazda MX-5 on this page: Oscar Jackson

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

2025-03-01 T1 Correct and make new T1 BOP adjustments.

#37737 from Touring Committee · Rule change · TB 25-03 (2025-03 Fastrack)

unclearT1 Mustang Spec 1430 restrictor opens 60mm to 65mm; Spec 1460 weight rises to 3500 lbs, restrictor 70mm; Corvette 1190 restrictor opens 67mm to 70mm; BMW 1090 restrictor narrows 40mm to 35mm; BMW 1100 weight rises to 3350 lbs.

In T1 Spec Lines, change Weight, Restrictor Required and/or Notes as follows:
Mustang - Spec Line 1430:
Restrictor Required: "~~60mm~~ 65mm - FPR"
Mustang - Spec Line 1460:
Weight: "~~3425~~ 3500"
Restrictor Required: "70mm - FPR"
Corvette Spec Line 1190:
Restrictor Required: "~~67mm~~ 70mm - Flat Plate"

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BMW - Spec Line 1090:
Required Restrictor: "(2) X ~~40mm~~ 35mm diameter hole inlet restrictor plate required"
Chassis Notes: "This spec line is set to expire 12/31/25."
BMW - Spec Line 1100:
Minimum Weight: "~~3150~~ 3350”

2025-04-01 T1 Cadillac CT4-V Blackwing

#38003 from Touring Committee · Rule change · TB 25-04 (2025-04 Fastrack)

neutralCadillac CT4-V Blackwing added to T1 Spec Line 1115, 3564cc, 3750 lbs minimum weight.

In T1 Spec Lines, classify Cadillac CT4-V Blackwing as follows:

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

2025-05-01 T1 Acceptance of Porsche 981 GT4 Clubsport into T1

#36664 from John Brown · Rule change · TB 25-05 (2025-05 Fastrack)

neutralPorsche 981 GT4 Clubsport added to T1 as spec line 4085, minimum weight 3100 lbs with driver.

In T1-GT4 Spec Lines, classify Porsche 981 GT4 Clubsport as follows:

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

2025-05-01 T1 Request to Restore T1 Honda S2000 to Proper Weights

#37644 from David Mead · Rule change · TB 25-05 (2025-05 Fastrack)

fasterT1 Honda S2000 minimum weight reduced from 2950 lbs to 2900 lbs.

In T1 Spec Lines, Honda S2000, Spec Line 1530, change as follows:
Minimum Weight: "~~2950~~ 2900"
Chassis Notes: "This spec line is set to expire as of 12/31/2025 if not represented in Majors competition in 2025."

2025-05-01 T1 DCT Transmission in E46

#37964 from Matt Spicuzzi · Rule change · TB 25-05 (2025-05 Fastrack)

neutralT1 BMW E46 M3 permits BMW #GS7D36SG aftermarket sequential transmission in SL# 1060 and 1070.

In T1 Spec Lines, BMW E46 M3, add to Chassis Notes the following:
SL# 1060: "BMW #GS7D36SG transmission permitted as an aftermarket sequential option."
SL# 1070: "BMW #GS7D36SG transmission permitted as an aftermarket sequential option."

Applies to BMW M3 on this page: Ian Barberi

2025-05-01 T4 Correct Ring and Pinion Ratio to T3, Sorry I Mean T4 3.7 V6 Stang

#38041 from David Mead · Rule change · TB 25-05 (2025-05 Fastrack)

neutralT4 Ford Mustang V6 05-14 allows GT 8.8 rear axle or 7.5 axle with 3.45:1 ratio.

In T4 Spec Lines, Ford Mustang V6 (05-14), add to Notes the following:
"GT 8.8 rear axle assembly allowed. 3.45 or 3.55 final drive ratio allowed. 7.5 rear axle assembly with 3.45:1 final drive allowed."

2025-05-01 T4 T4 Mustang

#38058 from Scotty B White · Rule change · TB 25-05 (2025-05 Fastrack)

neutralT4 Ford Mustang V6 05-14 now permits OEM style rear deck spoiler similar to Laguna/CS packages.

In T4 Spec Lines, Ford Mustang V6 (05-14), add to Notes as follows:
"OEM style rear deck spoiler similar to Laguna/CS packages permitted.”

2025-05-01 T1 Reduce E92 M3 Minimum Weight to 3050

#38092 from Shane Brown · Rule change · TB 25-05 (2025-05 Fastrack)

fasterT1 BMW M3 E92 minimum weight reduced to 3300 lbs.

In T1 Spec Lines, BMW M3 E92 (08-13), Spec Line 1100, change Min. Weight as follows:
~~"3350~~ 3300"

2025-05-01 T1 Finalize Spec Line for T1 Darkhorse

#38106 from Touring Committee · Rule change · TB 25-05 (2025-05 Fastrack)

fasterT1 Mustang Darkhorse R gets 315 front and rear tyres, loses 500 lbs minimum weight to 3600.

In T1 Spec Lines, Mustang Darkhorse R (Mustang Challenge) Spec Line- 4119, change as follows:
Tire size: "~~305~~ 315 (f) 315(r)"
Performance Control: "~~TBD~~"
Min. Weight with driver (LBS): "~~10.5 (f) 11 (r)~~ 3600"
Chassis Notes: "Must conform to Mustang Challenge Rules. Tires conforming to Mustang Challenge rules are permitted. **This
car is not eligible for the Runoffs until it has competed in 3 Super Tour events.**"

2025-06-01 T4 T4 Mustang

#38059 from Scotty B White · Rule change · TB 25-06 (2025-06 Fastrack)

fasterT4 Ford Mustang V6 05-14 weight drops from 3400 to 3300 lbs.

In T4 Spec Lines, Ford Mustang V6 (05-14), change as follows:
Final Drive: "3.45 or 3.31"
"Weight: "~~3400~~ 3300"

2025-06-01 T4 SSC tire allowance

#38216 from Benjamin Bunk · Rule change · TB 25-06 (2025-06 Fastrack)

neutralT4 Scion FR-S and Subaru BRZ Solo Spec allow any 200TW 225/45/17 or 215/45/17 DOT tire.

In T4 Spec Lines, Scion FR-S Solo Spec Coupe (13-16), change Notes as follows:
"Any 200TW 225/45/17 or 215/45/17 DOT tire permitted."
In T4 Spec Lines, Subaru BRZ Solo® Spec Coupe (13-16), change Notes as follows:
"Any 200TW 225/45/17 or 215/45/17 DOT tire permitted."

Applies to Scion FR-S on this page: Tony Kiratsous

2025-07-01 T4 Allow B-Spec cars to run in T4

#38439 from Derrick Ambrose · Rule change · TB 25-07 (2025-07 Fastrack)

neutralT4 now permits B-Spec and C-Spec cars to compete in the class.

In GCR, Section 9.1.9.2, Touring car eligibility, 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 B-Spec or C-Spec rules are
permitted to compete in Touring 4."

2025-08-01 T4 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"

2025-11-01 T4 02-06 Mini Cooper Gear Ratios

#38966 from Trenton Kramer · Rule change · TB 25-11 (2025-11 Fastrack)

unclearT4 Mini Cooper S R53 02-06 gear ratios changed to 12.79, 7.79, 5.65, 4.62, 3.83, 3.13 or 11.42, 7.18, 5.39, 4.40, 3.65, 2.96.

In T4 Spec Lines, Mini Cooper S R53 (02-06), change Gear Ratios as follows:
"12.79, 7.79, 5.65, 4.62, 3.83, 3.13 or overall- 11.42, 7.18, 5.39, 4.40, 3.65, 2.96"

2025-11-01 T4 Reinstatement of the 2005-2010 Cobalt into T4

#38987 from Tim Little · Rule change · TB 25-11 (2025-11 Fastrack)

neutralChevrolet Cobalt SS Sport Coupe 06-10 reinstated to T4 with 2384cc engine, 2628 restrictor, 2700 lbs minimum weight.

In T4 Spec Lines, classify Chevrolet Cobalt SS, Sport Coupe (06-10) as follows:

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

2025-11-01 T4 Request to Classify Mercedes C230K

#39080 from Patrick Morgan · Rule change · TB 25-11 (2025-11 Fastrack)

neutralMercedes C230 Kompressor 2002-2005 classified in T4 at 3240 lbs with 17-inch wheels and 300/290 mm brakes.

In T4 Spec Lines, classify Mercedes C230 Kompressor (2002-2005) as follows:

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

2025-11-01 T4 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."

Applies to Mazda MX-5 on this page: Oscar Jackson

Applies to Mazda Miata on this page: Kristina Etherington, Kayla Etherington

2025-11-01 T4 E&O wheel size on ND

#39168 from Josh Smith · Rule change · TB 25-11 (2025-11 Fastrack)

unclearT4 Mazda MX-5 Miata/Club 16-18 wheel size changed to 17 x 7.5 inches.

In T4 Spec Lines, Mazda MX-5 Miata/Club (16-18), change Wheel Size (in.) as follows:
"17 x 7.5"

Applies to Mazda MX-5 on this page: Oscar Jackson

Applies to Mazda Miata on this page: Kristina Etherington, Kayla Etherington

2025-11-01 T4 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.

Applies to Mazda MX-5 on this page: Oscar Jackson

Applies to Mazda Miata on this page: Kristina Etherington, Kayla Etherington

2025-11-01 T4 Touring 4 Post-Runoffs BOP Adjustments and Changes

#39251 from Touring Committee · Rule change · TB 25-11 (2025-11 Fastrack)

In T4 Spec Lines, Acura RSX/ RSX Type-S (02-06), change Restrictor as follows:
"~~55mm FPR~~"
In T4 Spec Lines, Acura TSX (2004-2008), change Restrictor as follows:
"~~47mm FPR~~ 52mm FPR"
In T4 Spec Lines, BMW Z4 2.5L (03-05) , change Weight as follows:
"~~3050~~ 2950"
In T4 Spec, BMW 320i (14-15), remove this spec line in its entirety.
In T4 Spec Lines, BMW 323 (98-00), change as follows:

Show 36 more lines

Tire size: "~~225~~ 245"
Weight: "~~3250~~ 3150"
In T4 Spec Lines, Ford Mustang V6 (05-14), change as follows:
Restrictor: "~~50mm~~ 43mm"
Weight: "~~3300~~ 3400"
In T4 Spec Lines, Honda Civic Si (06-11), change Restrictor as follows:
"~~55mm~~"
In T4 Spec Lines, Honda Civic Si (12-15), change as follows:
Restrictor: "~~47mm~~ 52mm
Notes: "~~Transmission and Differential must be stock.~~"
In T4 Spec Lines, Mazda MX-5 / Club Model (06-15), change as follows:
Weight: "~~2550~~ 2500"
Notes: "Factory bolt-in roll bar/cross member may be removed to facilitate roll cage installation. MSR option permitted.
Suspension package permitted with a 100 lbs. weight increase that includes the following parts: front spring mount PT#-0000-
04-5259, front springs #0000-04-9700-08, rear spring mount PT#-0000-04-5258, rear springs #0000- 04-9400-07, helper springs
#0000-04-HLPR-EB (optional), Swaybar kit – PT#-0000-04-5306-EB that includes (front sway bar kit PT#0000-04-5306-FT, rear
sway bar kit PT#-0000-04-5306-RR), offset front camber bushing PT#- 0000-04-5407-NC. Mazda Motorsports cold air intake part
#0000-06-5150-KT allowed. Mazda Motorsport RX8 rear Hub Conversion kit part number 0000-04-5811-KT allowed, RX8 front
hubs PT# F189-33-04X allowed. Allow Mazda header part numbers 0000-06-5407 or 0000-06-5407-NC. Any OEM or aftermarket
hardtop is permitted that retains the OEM roof silhouette, including Mazda hardtop and part #0000-07-5901-CC. Aftermarket
power steering reservoir is allowed. Mazda Transmission kit part # 0000-02-5700. Mazda Motorsports LSD #32655 permitted
without penalty. ~~Any other non-OEM limited slip differential allowed with +50 lbs. weight penalty.~~ Front spoiler permitted
(NF51-V4-900F). Transmission kit # 0000-02-57
In T4 Spec Lines, Pontiac Solstice / Saturn Sky (06-09), change as follows:
Weight: "~~2800~~ 2700"
Brakes: "(F) ~~296~~ 315 Vented Disc max (R) 278 Solid Disc"
Notes: "~~GM calipers #22720705, and #25900764 permitted~~"
In T4 Spec Lines, Scion FRS/10 series (13-16), change Weight as follows:
"~~2925~~ 2875"
In T4 Spec Lines, Subaru BRZ/ BRZ Limited (13-16), change Weight as follows:
"~~2925~~ 2875"
In T4 Spec Lines, Subaru BRZ (17-21), change Weight as follows:
"~~3000~~ 2950"
In T4 Spec Lines, Toyota 86, GT (17-21), change Weight as follows:
"~~3000~~ 2950"
SCCA Runoffs

Applies to Mazda MX-5 on this page: Oscar Jackson

2025-12-01 T4 Classing 1995-99 Dodge Neon SOHC

#39285 from Preston Obremski · Rule change · TB 25-12 (2025-12 Fastrack)

neutralDodge/Plymouth Neon ACR SOHC/DOHC 95-99 newly classified T4 at 2350 lbs minimum weight.

In T4 Spec Lines, classify Dodge/Plymouth Neon ACR SOHC/DOHC (2/4 door) (95-99) as follows:

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

2025-12-01 T1 Keep S2000 Classification

#39344 from David Mead · Rule change · TB 25-12 (2025-12 Fastrack)

unclearUnable to summarize: letter states intent but provides no actual rule changes to S2000 specification.

In T1 Spec Lines, Honda S2000, change as follows:

2025-12-01 T1 Correcting and updating T1 GT4 spec lines

#39394 from Touring Committee · Rule change · TB 25-12 (2025-12 Fastrack)

In T1-GT4 Spec Lines, change as follows:

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

2025-12-01 T1 BOP adjustments to non GT4 T1 cars

#39406 from Touring Committee · Rule change · TB 25-12 (2025-12 Fastrack)

fasterT1 non-GT4 cars: multiple restrictors enlarged (70mm to 73mm, 75mm to 78mm, 55mm to 60mm, 61mm to 70mm); one weight increased to 3600.

In T1 Spec Lines, change as follows:
Spec Line # 1134
Required Restrictor: "~~61mm~~ 70mm - Flat Plate"
Spec Line # 1140
Required Restrictor: "72mm ~~- Flat Plate"~~
Spec Line # "1175"
Maximum Displ.: "L76 5967cc OEM"
Minimum Weight: "3250"

Show 38 more lines

Required Restrictor: "80mm"
Engine Notes: "An L76 is an LS2 block with LS3 intake manifold and heads. All parts must be OEM. May resleeve to stock
parameters for engine repair."
Spec Line # 1180
Required Restrictor: "~~75mm~~ 78mm - Flat Plate"
Spec Line # 1190
Required Restrictor: "~~70mm~~ 73mm - Flat Plate"
Spec Line # 1200
Required Restrictor: "~~72mm~~ 78mm - Flat Plate"
Spec Line # 1201
Required Restrictor: "~~70mm~~ 73mm - Flat Plate"
Spec Line # 1210
Required Restrictor: "~~72mm - Flat Plate~~"
Spec Line # 1350
Required Restrictor: "(2) ~~55mm~~ 60mm flat plate"
Spec Line # 1370
Required Restrictor: "(2) ~~55mm~~ 60mm flat plate"
Spec Line # 1390
Required Restrictor: "(2) ~~55mm~~ 60mm flat plate"
Spec Line # 1420 "*Spec line Expires 12/23"
Required Restrictor: "~~52mm FPR~~"
Spec Line # 1429
Required Restrictor: "~~75mm - FPR~~"
Spec Line # 1460
Weight: "~~3500~~ 3600"
Required Restrictor: "~~70mm - FPR~~"
Spec Line # 1480
Required Restrictor: "~~80mm FPR~~"
Spec Line # 1490
Required Restrictor: "~~75mm - FPR~~"
Spec Line # 1590
Engine Notes: "~~90mm Throttle Body Permitted~~"
Spec Line # 1595
Required Restrictor: "~~72mm – FPR~~"
Spec Line # 1596
Required Restrictor: "~~61mm~~ 70mm – FPR"
Spec Line # 4120
Required Restrictor: "~~75mm flat plate~~"

2025-12-01 T1 Remove T1 Spec Line

#39407 from Touring Committee · Rule change · TB 25-12 (2025-12 Fastrack)

neutralT1 BMW M3 E92 (08-13) Spec Line 1090 removed entirely.

In T1 Spec Lines, BMW M3 E92 (08-13) Spec Line number 1090, delete Spec Line in its entirety.

2026-01-01 T4 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 T4 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."

2026-01-01 T1 additional T1 adjustment

#39520 from Touring Committee · Rule change · TB 26-01 (2026-01 Fastrack)

unclearT1 Spec Line restrictor changes from 70mm flat plate to unspecified new specification.

In T1 Spec Line, Spec line # 1132, change Restrictor as follows:
"~~70mm - Flat Plate~~"

2026-02-01 T4 T4 and T3 Feedback

#39230 from Tim Myers · Rule change · TB 26-02 (2026-02 Fastrack)

neutralFord Mustang V6 (05-14) removed from T4 Spec Lines.

In T4 Spec Lines, remove Ford Mustang V6 (05-14) in its entirety.

2026-02-01 T4 T4 Mustang 4.0

#39489 from Scotty B White · Rule change · TB 26-02 (2026-02 Fastrack)

fasterT4 Mustang 4.0 V6 tire size increases from 245 to 255.

In T4 Spec Lines, Ford Mustang V6 (05-10), change as follows:
Tire: "~~245~~ 255"
Notes: "ABS (option code 552) allowed. FR3 Handling Pack #M-2007-FR3V6 allowed (kit does not need to be run in its entirety).
The kit includes: Dampers M-18000-A, Lowering Springs M-5300-N, Sway Bars M- 5490-C, Strut Tower Brace M-20201-F. Ford
Positraction LSD part #M-4204-C75 is allowed. Any springs max F: 500 and R: 400 permitted. Any sway bar up to F: 35mm and R:
28mm permitted. Aftermarket Shocks conforming to T4 rules allowed. Panhard bar, part # BAR-M-4264-A permitted, or any pan
hard bar permitted must be set at same length as a stock bar, center mounting hole to center mounting hole +/- 0.25 inch. An
alternative steel drive shaft is permitted; this drive shaft is otherwise unrestricted, but no modifications to other components

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are permitted to facilitate its installation. An Aluminum driveshaft is allowed. Any LSD permitted. Ford brake kit M-2300-D
allowed. Aftermarket header allowed. GT 8.8 rear axle assembly allowed. ~~3.45 or 3.55~~ Alternate final drive ratio allowed. 7.5
rear axle assembly ~~with 3.45:1 final drive~~ allowed. Cold Air Intake allowed. Koni part numbers 8741-1494SPORT (front) and
8241-1240SPORT (rear). Spec clutch #SF661 and flywheel #SF66A permitted. 14” Brembo Brake Kit#M-2300-S permitted."

2026-02-01 T4 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 T1 LS1 into Corvette C6 Spec Line Request

#39716 from Danny Kellermeyerhttps://crbscca.com/secu · Rule change · TB 26-02 (2026-02 Fastrack)

neutralT1 Corvette C6 LS1/LS6 Spec Line reinstated: 3200 lbs minimum weight, 70mm restrictor required.

In T1 Spec Lines, reinstate Spec Line # 1139, Chevrolet Corvette C6 (05-13) Includes Z51, GrandSport, Z06, Z06 Carbon, as
follows:
Max Displ: "LS1, LS6 OEM"
Min Weight: "3200"
Required Restrictor: "70mm"

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