BoP Lab / Road America

T4 at Road America

No mapRunoffs 2020

This track has been raced on 2 configurations (Scoring Sidebar Race, 4.05 mi; 4.01 mi). Laps on different configurations are not comparable, so only events on the 4.05 mile layout are shown; switch above to see the others.

Sectors are not comparable across all of these events. Sector times and the theoretical lap use Runoffs 2025, Runoffs 2026 only. Runoffs 2020 (different number of sectors), Runoffs 2024 (different number of sectors) count towards whole-lap times and trap speed only.

One run is left out as not that car's own laps (far quicker than the car managed in any other session and than anyone else in its class all week; usually a swapped transponder): Tony Kiratsous in Runoffs 2024 Run 1 EP, FP GTL, HP, B-Spec, STL, T3, T4 Sat (2:03.077; the car's best in any other session was 2:42.968 and the rest of the class's best all week 2:27.075).

10 laps are left out as timing errors (far too short to be a lap of this track). The rest of those sessions, sectors included, is used.

Pos	Car	Driver	Class	#	Lap	Theoretical	Qual	Race	5-lap stint	Consistency	Trap	S1	S2	S3	S4
1	Mazda MX-5 (2006)	Ethan Barker 2+ cars	T4	117	2:27.075 E-P1		2:38.490 E-Q3	2:38.193 E-R			124.0 E-P2
2	Ford Mustang V6 (2011)	Alex Lozano 2+ cars	T4	1x, 1	2:32.633 C-R	2:31.531	2:33.003 C-Q1	2:32.633 C-R	2:32.999 C-R	+0.764 C-R	133.7 C-R	43.402 C-P1	58.159 C-Q1	29.333 C-Q1	20.637 C-Q1
3	Ford Mustang V6 (2012)	Matt Spicuzzi 2+ cars	T4	11	2:32.692 C-R	2:31.921	2:32.956 C-Q1	2:32.692 C-R	2:33.007 C-R	+0.568 C-R	133.9 C-P1	43.619 C-P1	58.151 C-Q1	29.503 C-Q1	20.648 C-Q1
4	Mazda RX-8 (2009)	Alex Lozano 2+ cars	T4	98, 198	2:34.208 E-R	2:34.208	2:34.437 E-Q2	2:34.208 E-R	2:35.685 E-R	+2.118 E-R	129.3 E-Q2	44.776 A-R	59.503 A-R	30.073 A-R	21.044 A-R
5	Mazda RX-8 (2009)	Matt Spicuzzi 2+ cars	T4	63x, 63	2:34.430 E-Q2	2:34.430	2:34.430 E-Q2	2:34.657 E-R	2:36.229 A-R	+0.996 A-R	128.4 E-Q2	44.643 A-Q3	59.433 A-R	29.949 A-R	21.057 A-Q3
6	Ford Mustang V6 (2012)	Scotty B White	T4	0, 0b	2:34.658 E-P1	2:34.658	2:35.314 C-Q2	2:35.669 C-R	2:36.034 C-R	+0.835 C-R	132.6 E-P1	44.641 C-R	59.065 C-Q2	30.000 C-Q2	21.056 C-P2
7	Mazda RX-8 (2004)	Marc Cefalo 2+ cars	T4	00	2:34.874 E-Q3	2:34.874	2:34.874 E-Q3	2:34.956 E-R	2:35.988 E-R	+1.420 E-R	128.4 C-R	44.610 C-R	59.414 C-Q1	30.211 C-R	21.417 C-P1
8	Mazda RX-8 (2009)	Christian Braunlich	T4	83	2:35.490 E-R		2:36.237 E-Q2	2:35.490 E-R	2:36.306 E-R	+1.250 E-R	127.4 E-R
9	Mazda RX-8 (2006)	Ethan Barker 2+ cars	T4	28	2:35.831 C-Q2	2:35.267	2:35.831 C-Q2	2:35.887 C-R	2:36.451 C-R	+0.682 C-R	127.6 C-R	44.747 C-R	59.145 C-P1	30.158 C-R	21.217 C-Q2
10	Mazda RX-8 (2004)	Stephen Blethen	T4	50, 38	2:36.279 E-Q3	2:36.279	2:36.279 E-Q3	2:38.066 E-R	2:40.267 A-R	+1.307 A-R	127.0 E-Q2	45.877 A-R	1:00.449 A-Q3	30.934 A-R	21.619 A-R
11	Mazda RX-8 (2004)	Raymond Blethen	T4	51	2:36.319 E-Q3	2:36.319	2:36.319 E-Q3	2:36.426 E-R	2:37.359 E-R	+1.757 E-R	128.0 E-R	45.776 A-Q3	1:00.195 A-R	30.714 A-R	21.539 A-Q3
12	Mazda RX-8 (2005)	Chris Haldeman	T4	28	2:36.590 E-Q3		2:36.590 E-Q3				124.7 E-P3
13	Mazda MX-5 (2006)	Kevin Fryer	T4	98	2:37.203 A-Q3	2:37.059	2:37.203 A-Q3	2:37.860 A-R	2:38.814 A-R	+1.346 A-R	124.2 A-R	45.539 A-Q3	59.774 A-Q3	30.392 A-P1	21.354 A-Q3
14	Toyota 86 (2017)	Chip Herr	T4	97	2:37.211 C-R	2:36.536	2:38.269 C-Q2	2:37.211 C-R	2:37.767 C-R	+0.962 C-R	128.2 C-R	45.120 C-R	59.811 C-R	30.299 C-R	21.306 C-R
15	BMW Z4 (2003)	Mario Carini	T4	43, 43x	2:37.269 A-Q3	2:36.971	2:37.269 A-Q3	2:44.902 A-R			126.8 A-R	45.130 A-Q3	1:00.162 A-Q3	30.422 A-Q3	21.257 A-Q3
16	Toyota 86	John Heinricy	T4	35	2:37.403 G-Q3		2:37.403 G-Q3	2:38.381 G-R	2:38.721 G-R	+0.924 G-R	125.0 G-Q3
17	BMW 320i	Chi Ho	T4	06	2:37.714 G-Q2		2:37.714 G-Q2	2:37.881 G-R	2:40.211 G-R	+1.893 G-R	130.2 G-Q3
18	Mazda MX-5	Michael Borden	T4	42	2:37.904 G-R		2:38.152 G-Q3	2:37.904 G-R	2:39.067 G-R	+1.792 G-R	124.4 G-Q3
19	Mazda MX-5	Marc Cefalo 2+ cars	T4	00s	2:38.130 E-P1						122.5 E-P3
20	Mazda 3 S (2015)	Derrick Ambrose	T4	70	2:38.162 A-R	2:37.460	2:38.247 A-Q3	2:38.162 A-R	2:38.696 A-R	+1.460 A-R	126.3 A-R	45.262 A-R	1:00.159 A-Q3	30.871 A-R	21.168 A-Q3
21	Subaru BRZ	Nick Leverone	T4	186	2:38.202 G-Q3		2:38.202 G-Q3	2:38.640 G-R	2:38.935 G-R	+0.669 G-R	127.0 G-Q3
22	Mazda MX-5 (2008)	James Ebben	T4	36, 166	2:38.940 E-Q3		2:38.940 E-Q3	2:39.248 E-R	2:41.581 G-R	+0.587 G-R	123.7 E-R
23	Mazda MX-5 (2006)	Madin Workman	T4	52	2:39.200 A-P1	2:39.200	2:39.655 A-Q3	2:40.132 A-R	2:40.578 A-R	+0.794 A-R	120.7 A-P1	45.942 A-Q3	1:00.303 A-Q3	31.183 A-Q3	21.918 A-Q3
24	Ford Mustang V6 (2010)	Paolo Salvatore	T4	2, 142	2:39.324 E-Q3		2:39.324 E-Q3	2:39.508 E-R	2:45.413 G-R	+1.774 G-R	126.4 E-R
25	Scion FR-S (2013)	Izzy Sanchez	T4	78	2:39.639 E-R		2:40.267 E-Q3	2:39.639 E-R	2:40.807 E-R	+1.565 E-R	125.2 E-R
26	Mazda MX-5 (2009)	Richard Mooney	T4	39, 2	2:39.766 C-R	2:38.905	2:39.809 C-Q2	2:39.766 C-R	2:41.014 C-R	+1.835 C-R	122.7 C-R	46.263 C-Q2	59.936 C-Q1	30.968 C-Q1	21.738 A-Q3
27	Mazda MX-5	Steve Bertok	T4	90	2:39.948 G-Q3		2:39.948 G-Q3	2:40.325 G-R	2:40.694 G-R	+0.544 G-R	123.9 G-Q3
28	Mazda RX-8 (2004)	Dirk Straussfeld	T4	123	2:39.988 E-Q3	2:39.988	2:39.988 E-Q3	2:41.791 E-R	2:43.011 E-R	+1.606 E-R	126.3 E-Q2	46.622 A-R	1:01.630 A-R	31.663 A-R	21.900 A-R
29	Mazda RX-8 (2006)	Leann Falk 2+ cars	T4	28a, 28	2:40.279 A-Q3	2:39.975	2:40.279 A-Q3	2:45.280 A-R			123.8 A-Q3	45.828 A-Q3	1:01.009 A-Q3	31.458 A-Q3	21.680 A-Q3
30	Scion FR-S	Roldan de Guzman	T4	49	2:40.336 G-R		2:41.414 G-Q3	2:40.336 G-R	2:40.787 G-R	+0.988 G-R	127.2 G-R
31	Mazda RX-8	Richard Dickey	T4	71	2:40.358 G-Q1		2:40.358 G-Q1	2:40.518 G-R	2:40.806 G-R	+0.613 G-R	127.4 G-Q1
32	Scion FR-S	Colin Koehler	T4	10	2:41.019 G-R		2:42.085 G-Q3	2:41.019 G-R	2:41.649 G-R	+1.099 G-R	124.6 G-Q3
33	Mazda RX-8	Brent Simonson	T4	3	2:41.396 G-R		2:42.106 G-Q3	2:41.396 G-R	2:41.823 G-R	+2.469 G-R	125.6 G-R
34	Mazda MX-5 (2006)	Connor Thomas	T4	129	2:41.414 C-P1	2:40.630	2:41.993 C-Q1	2:43.444 C-R	2:44.285 C-R	+1.373 C-R	122.5 C-P2, C-R	46.805 C-Q1	1:00.624 C-P2	31.091 C-P1	22.110 C-P3
35	BMW Z4	Ralph Porter	T4	32	2:42.353 G-R		2:45.908 G-Q2	2:42.353 G-R	2:42.999 G-R	+1.534 G-R	124.3 G-R
36	Scion FR-S (2013)	Tony Kiratsous	T4	35	2:42.968 E-R		2:44.248 E-Q2	2:42.968 E-R	2:52.963 E-R	+10.055 E-R	123.5 E-R
37	Mazda RX-8	Sergio Zlobin	T4	33	2:43.062 G-R		2:43.275 G-Q3	2:43.062 G-R	2:43.555 G-R	+0.914 G-R	121.7 G-Q3, G-R
38	Mazda MX-5 (2012)	Brad Childs	T4	87x, 87	2:43.200 C-Q1	2:42.202	2:43.200 C-Q1	2:43.774 C-R	2:44.342 C-R	+0.982 C-R	123.0 C-R	46.667 C-Q1	1:01.760 C-Q1	31.550 C-Q1	22.225 C-P1
39	Mini Cooper S (2002)	Trenton Kramer	T4	9x, 9	2:43.595 A-R	2:43.438	3:04.232 A-Q2	2:43.595 A-R			120.7 A-R	47.010 A-R	1:01.800 A-R	32.392 A-R	22.236 A-R
40	Ford Mustang V6	Richard Grunenwald	T4	93	2:44.382 G-R		2:46.171 G-Q3	2:44.382 G-R	2:45.518 G-R	+1.519 G-R	124.3 G-R
41	Ford Mustang V6	Matthew Miller	T4	96	2:46.371 G-R		2:46.874 G-Q3	2:46.371 G-R	2:46.863 G-R	+0.939 G-R	121.8 G-R
42	Mazda 3-S (2009)	Leann Falk 2+ cars	T4	26	2:48.510 E-Q3		2:48.510 E-Q3	2:50.981 E-R			117.7 E-Q2
43	Pontiac Solstice	Michael Dalton >115%	T4	88	2:50.378 G-R		2:50.698 G-Q1	2:50.378 G-R	2:51.216 G-R	+2.193 G-R	116.0 G-R
44	Mazda MX-5	Steven Christopher >115%	T4	50	2:50.565 G-R		2:53.748 G-Q3	2:50.565 G-R	2:51.261 G-R	+2.030 G-R	116.5 G-Q3, G-R

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 → I4AT 1.26 mi
S2 I4AT → I11 1.65 mi
S3 I11 → I13AB 0.57 mi
S4 I13AB → SF 0.57 mi
SF Spd SF → SFT 0.02 mi
Spd I4AT → I4A 0.02 mi

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

By car

Car	Class	Drivers	Lap	Qual	Race	Trap	S1	S2	S3	S4
Mazda MX-5	T4	11	2:27.075Ethan Barker	2:37.203Kevin Fryer	2:37.860Kevin Fryer	124.4Michael Borden	45.539Kevin Fryer	59.774Kevin Fryer	30.392Kevin Fryer	21.354Kevin Fryer
Mazda MX-5 (2006)	T4	4	2:27.075Ethan Barker	2:37.203Kevin Fryer	2:37.860Kevin Fryer	124.2Kevin Fryer	45.539Kevin Fryer	59.774Kevin Fryer	30.392Kevin Fryer	21.354Kevin Fryer
Mazda MX-5	T4	4	2:37.904Michael Borden	2:38.152Michael Borden	2:37.904Michael Borden	124.4Michael Borden
Mazda MX-5 (2008)	T4	1	2:38.940James Ebben	2:38.940James Ebben	2:39.248James Ebben	123.7James Ebben
Mazda MX-5 (2009)	T4	1	2:39.766Richard Mooney	2:39.809Richard Mooney	2:39.766Richard Mooney	122.7Richard Mooney	46.263Richard Mooney	59.936Richard Mooney	30.968Richard Mooney	21.738Richard Mooney
Mazda MX-5 (2012)	T4	1	2:43.200Brad Childs	2:43.200Brad Childs	2:43.774Brad Childs	123.0Brad Childs	46.667Brad Childs	1:01.760Brad Childs	31.550Brad Childs	22.225Brad Childs
Ford Mustang V6	T4	6	2:32.633Alex Lozano	2:32.956Matt Spicuzzi	2:32.633Alex Lozano	133.9Matt Spicuzzi	43.402Alex Lozano	58.151Matt Spicuzzi	29.333Alex Lozano	20.637Alex Lozano
Ford Mustang V6 (2011)	T4	1	2:32.633Alex Lozano	2:33.003Alex Lozano	2:32.633Alex Lozano	133.7Alex Lozano	43.402Alex Lozano	58.159Alex Lozano	29.333Alex Lozano	20.637Alex Lozano
Ford Mustang V6 (2012)	T4	2	2:32.692Matt Spicuzzi	2:32.956Matt Spicuzzi	2:32.692Matt Spicuzzi	133.9Matt Spicuzzi	43.619Matt Spicuzzi	58.151Matt Spicuzzi	29.503Matt Spicuzzi	20.648Matt Spicuzzi
Ford Mustang V6 (2010)	T4	1	2:39.324Paolo Salvatore	2:39.324Paolo Salvatore	2:39.508Paolo Salvatore	126.4Paolo Salvatore
Ford Mustang V6	T4	2	2:44.382Richard Grunenwald	2:46.171Richard Grunenwald	2:44.382Richard Grunenwald	124.3Richard Grunenwald
Mazda RX-8	T4	13	2:34.208Alex Lozano	2:34.430Matt Spicuzzi	2:34.208Alex Lozano	129.3Alex Lozano	44.610Marc Cefalo	59.145Ethan Barker	29.949Matt Spicuzzi	21.044Alex Lozano
Mazda RX-8 (2009)	T4	3	2:34.208Alex Lozano	2:34.430Matt Spicuzzi	2:34.208Alex Lozano	129.3Alex Lozano	44.643Matt Spicuzzi	59.433Matt Spicuzzi	29.949Matt Spicuzzi	21.044Alex Lozano
Mazda RX-8 (2004)	T4	4	2:34.874Marc Cefalo	2:34.874Marc Cefalo	2:34.956Marc Cefalo	128.4Marc Cefalo	44.610Marc Cefalo	59.414Marc Cefalo	30.211Marc Cefalo	21.417Marc Cefalo
Mazda RX-8 (2006)	T4	2	2:35.831Ethan Barker	2:35.831Ethan Barker	2:35.887Ethan Barker	127.6Ethan Barker	44.747Ethan Barker	59.145Ethan Barker	30.158Ethan Barker	21.217Ethan Barker
Mazda RX-8 (2005)	T4	1	2:36.590Chris Haldeman	2:36.590Chris Haldeman		124.7Chris Haldeman
Mazda RX-8	T4	3	2:40.358Richard Dickey	2:40.358Richard Dickey	2:40.518Richard Dickey	127.4Richard Dickey
Toyota 86	T4	2	2:37.211Chip Herr	2:37.403John Heinricy	2:37.211Chip Herr	128.2Chip Herr	45.120Chip Herr	59.811Chip Herr	30.299Chip Herr	21.306Chip Herr
Toyota 86 (2017)	T4	1	2:37.211Chip Herr	2:38.269Chip Herr	2:37.211Chip Herr	128.2Chip Herr	45.120Chip Herr	59.811Chip Herr	30.299Chip Herr	21.306Chip Herr
Toyota 86	T4	1	2:37.403John Heinricy	2:37.403John Heinricy	2:38.381John Heinricy	125.0John Heinricy
BMW Z4	T4	2	2:37.269Mario Carini	2:37.269Mario Carini	2:42.353Ralph Porter	126.8Mario Carini	45.130Mario Carini	1:00.162Mario Carini	30.422Mario Carini	21.257Mario Carini
BMW Z4 (2003)	T4	1	2:37.269Mario Carini	2:37.269Mario Carini	2:44.902Mario Carini	126.8Mario Carini	45.130Mario Carini	1:00.162Mario Carini	30.422Mario Carini	21.257Mario Carini
BMW Z4	T4	1	2:42.353Ralph Porter	2:45.908Ralph Porter	2:42.353Ralph Porter	124.3Ralph Porter
BMW 320i	T4	1	2:37.714Chi Ho	2:37.714Chi Ho	2:37.881Chi Ho	130.2Chi Ho
Mazda 3-S	T4	2	2:38.162Derrick Ambrose	2:38.247Derrick Ambrose	2:38.162Derrick Ambrose	126.3Derrick Ambrose	45.262Derrick Ambrose	1:00.159Derrick Ambrose	30.871Derrick Ambrose	21.168Derrick Ambrose
Mazda 3 S (2015)	T4	1	2:38.162Derrick Ambrose	2:38.247Derrick Ambrose	2:38.162Derrick Ambrose	126.3Derrick Ambrose	45.262Derrick Ambrose	1:00.159Derrick Ambrose	30.871Derrick Ambrose	21.168Derrick Ambrose
Mazda 3-S (2009)	T4	1	2:48.510Leann Falk	2:48.510Leann Falk	2:50.981Leann Falk	117.7Leann Falk
Subaru BRZ	T4	1	2:38.202Nick Leverone	2:38.202Nick Leverone	2:38.640Nick Leverone	127.0Nick Leverone
Scion FR-S	T4	4	2:39.639Izzy Sanchez	2:40.267Izzy Sanchez	2:39.639Izzy Sanchez	127.2Roldan de Guzman
Scion FR-S (2013)	T4	2	2:39.639Izzy Sanchez	2:40.267Izzy Sanchez	2:39.639Izzy Sanchez	125.2Izzy Sanchez
Scion FR-S	T4	2	2:40.336Roldan de Guzman	2:41.414Roldan de Guzman	2:40.336Roldan de Guzman	127.2Roldan de Guzman
Mini Cooper S	T4	1	2:43.595Trenton Kramer	3:04.232Trenton Kramer	2:43.595Trenton Kramer	120.7Trenton Kramer	47.010Trenton Kramer	1:01.800Trenton Kramer	32.392Trenton Kramer	22.236Trenton Kramer
Pontiac Solstice	T4	1	2:50.378Michael Dalton	2:50.698Michael Dalton	2:50.378Michael Dalton	116.0Michael Dalton

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

Runoffs 2020 → Runoffs 2024 2020-10-02 to 2024-10-01

2020-12-01 T4 Alfa Romeo 4C Launch Edition

#29531 from John Weisberg · Rule change · TB 20-12 (2020-12 Fastrack)

neutralT3 Alfa Romeo 4C Launch Edition now allowed in Spec Lines.

In T3, Spec Lines, Alfa Romeo 4C (2015-), add to Notes as follows:
"Launch Edition allowed"

2020-12-01 T4 Post Runoffs Feedback for T4

#29752 from Tim Myers · Rule change · TB 20-12 (2020-12 Fastrack)

In T4, BMW 320i (14-15) Spec Lines, change as follows:
Weight: "~~3150~~ 3100"
Notes: "32 31mm TIR required."
In T4, Ford Mustang V6 (05-10) Spec Lines, change Notes as follows:
"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:
22mm permitted. Aftermarket Shocks conforming to T4 rules allowed. Panhard bar, part # BAR-M-4264-A permitted or any pan

Show 29 more lines

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
are permitted to facilitate its installation. An Aluminum driveshaft is allowed. Any LSD permitted. Ford brake kit M-2300-D
allowed. Aftermarket header allowed."
In T4, Honda Civic Si (06-11) Spec Lines, change Notes as follows:
"The following items must remain stock: ~~shock/struts (including mounts), original wheels, and~~ transmission differential - unless
specified below. Honda Factory Performance Suspension Kit #08W60- SVB-100 allowed. 55mm flat plate restrictor
required. ~~Tokico HP shocks allowed (P/N- HE2986, HB2252, HB2251).~~ Eibach springs allowed (P/N 4031.140). Aftermarket Shocks
conforming to T4 rules allowed. SPC Adjustable Control Arm - P/N 67466 permitted."
In T4, Honda Civic Si (14-15) Spec Lines, change Notes as follows:
"Transmission and Differential must be stock. Honda Sport Suspension Kit, part number 08W60- TS9-100 permitted. H&R Sport
Springs P/N 51891 and HPD part number (P/N51410F23SA00) allowed. 47mm flat plate restrictor required. Camber plates
permitted. ~~Original wheels up to 18” maximum permitted. S~~ PC Rear Adjustable Control Arm – P/N 67467 permitted. Sway bars
up to 32mm front and rear permitted. Springs allowed up to 700 pounds."
In T4, Mazda3 s (04-09) Spec Lines, change as follows:
Weight: "~~2550~~ 2500"
Notes: "ABS option allowed. Miata speedometer gear #M527-17-400A permitted. Any spring up to a maximum spring rate of
500 pounds front and 800 pound rear may be used Cold Air Intake system allowed. OEM optional limited slip differential
permitted. Non-OEM limited slip differential allowed +25 lbs. 32mm OEM style and configuration rear sway bar allowed. Header
allowed. Front strut tower brace allowed. OBD2 requirement for ECU does not apply. "
In T4, Mazda3 (14-18) Spec Lines, change Wheels as follows:
"18 x 7 7.5"
In T4, Mazda RX-8 Base/R3/Sport/ GT (04-12) Spec Lines, change as follows:
Weight: "~~3125~~ 3075"
Notes: "Mazdaspeed radiator #0000-01-8501 allowed. Use of 2009 R3 transmission is permitted with alternate gear ratios as
listed. R3 transmission must be paired with the listed alternate final drive. Only Mazdaspeed front sway bar kit #0000-04-8302-
AD and Mazdaspeed coil spring kit #QSEA34-01Z allowed. 60mm flat plate restrictor required. Alternate sway bar permitted,
Progressive Technologies Part Number: 61-0543 and 62.1152 allowed. OE Rear spoiler allowed #F151-V4-920F. OE front air dam
allowed #F151-V4-900f-BB."

2021-01-01 T4 Request to Classify BMW M2 CS

#29523 from Victor Leleu · Rule change · TB 21-01 (2021-01 Fastrack)

neutralBMW M2 CS Cup 2020+ classified in T2 at 3625 lbs with 2979cc engine, 10.5x18 wheels, 295 tires.

In T2, classify the BMW M2 CS Cup 2020+ as follows:

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

2021-01-01 T4 Allow the SpecMX-5 Update Kit Into Touring 4 for the MX-5

#29681 from Tim Wise · Rule change · TB 21-01 (2021-01 Fastrack)

unclearT3 and T4 Mazda MX-5 06-15 now allow Mazda Transmission kit part # 0000-02-5700.

In T4, Spec Lines, Mazda MX-5 / Club Model (06-15), add to Notes as follows:
"Mazda Transmission kit part # 0000-02-5700."
In T3, Spec Lines, Mazda MX-5 NC (06-15), add to Notes as follows:
"Mazda Transmission kit part # 0000-02-5700."

2021-01-01 T4 Request Mustang 8.8ÃƒÂ¢Ã¢â€šÂ¬Ã‚Â rear axle replacement

#29860 from Randall Smart · Rule change · TB 21-01 (2021-01 Fastrack)

slowerT4 Ford Mustang V6 05-10 allows GT 8.8 rear axle with 3.55 final drive, adds 25 lb penalty.

In T4, Spec Lines, Ford Mustang V6 (05-10), add to Notes as follows:
"GT 8.8 rear axle assembly with 3.55 final drive allowed with +25lb penalty."

2021-01-01 T4 Cap year range on all 86s

#29908 from Touring Committee · Rule change · TB 21-01 (2021-01 Fastrack)

neutralT3 and T4 FR-S, 86, and BRZ year ranges capped: T3 at 2021, T4 at 2017-2021.

In T3, Spec Lines, Scion FR-S/ Toyota 86, GT (13-20), change Year as follows:
"(13-20 21)"
In T3, Spec Lines, Subaru BRZ (13-20), change Year as follows:
"(13-20 21)"
In T4, Spec Lines, Subaru BRZ (2017-), change Year as follows:
"(20 17-21)"
In T4, Spec Lines, Toyota 86, GT (2017-), change Year as follows:
"(20 17-21)"

2021-02-01 T4 2021 Toyota Supra

#29567 from Ryan Saari · Rule change · TB 21-02 (2021-02 Fastrack)

neutralToyota Supra 2020- newly classified in T2 at 3450 lbs minimum weight with 295 tire and 19-inch wheels.

In T2, classify the Toyota Supra (2020-) as follows:
T2 Bore x
Stroke(mm)/ Disp.

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

2021-02-01 T4 06-15 MX-5 Durability

#29781 from CHRISTOPHER WINDSOR · Rule change · TB 21-02 (2021-02 Fastrack)

neutralT4 Mazda MX-5 durability rule now applies to T2-T4 instead of T2-T3 only.

In T4, GCR Section 9.1.9.2.D.i.5., change as follows:
"T2-T3 4 only:"

2021-02-01 T4 Request for Update to T4 Spec Line for Chevrolet Sonic (2011-)

#29838 from Gary McCormick · Rule change · TB 21-02 (2021-02 Fastrack)

neutralT4 Chevrolet Sonic (2011-) spec clarified: 28mm TIR restrictor placement, PCV plug requirement, and allowed suspension parts listed.

In T4 Spec Lines, Chevrolet Sonic (2011-), change as follows:
"Chevrolet Sonic RS (2011-)"
In T4 Spec Lines, Chevrolet Sonic (2011-), change Notes as follows:
"28mm TIR required and must be placed with the restriction within 10 mm of the end of the stock turbo inlet. The PCV port in the
stock turbo inlet must be plugged. Eibach 38160.140 allowed. ZZP Part # ZZ-SNCRSB allowed. Front strut brace allowed. GM
suspension kit #2312 → 3679 allowed. H&R 50702 spring kit allowed."

2021-02-01 T4 NC MX-5 06-15 Part Number updates for 2021

#29921 from Josh Smith · Rule change · TB 21-02 (2021-02 Fastrack)

neutralT4 Mazda MX-5 06-15 removes front and rear end links from suspension package spec.

In T4, Spec Lines, Mazda MX-5 / Club Model (06-15), change Notes as follows:
"The following items must remain stock OEM unmodified, unless alternate part numbers are permitted below: transmission,
differential, and LSD. 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) ~~front end links #0000-04-5499, rear end links #0000- 04-5498~~, offset front
camber bushing PT#-0000-04-5407-NC. Mazda Motorsports cold air intake part #0000-06-5150-KT allowed. Mazda Motorsport

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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. Non-OEM limited slip differential allowed with +50 lbs. weight
penalty. 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."

2021-02-01 T4 BMW Z4 2.5L (03-05) Spec Line

#30037 from ROGER KNUTESON · Rule change · TB 21-02 (2021-02 Fastrack)

fasterT4 BMW Z4 2.5L (03-05) minimum weight reduced from 3100 to 3050 lbs.

In T4 Spec Lines, BMW Z4 2.5L (03-05), change weight as follows:
"~~3100~~ 3050"

Applies to BMW Z4 on this page: Mario Carini, Ralph Porter

2021-02-01 T4 Sway Bars for T4 2016+ MX5 Mazda

#30063 from David Mead · Rule change · TB 21-02 (2021-02 Fastrack)

neutralT4 2016+ Mazda MX-5 Miata gains allowance for 29mm front and 16mm rear sway bars.

In T4 Spec Lines, Mazda MX-5 Miata (16-18), add to Notes as follows:
"29mm (f) 16mm (r) sway bars allowed."

Applies to Mazda MX-5 on this page: Michael Borden, Marc Cefalo, Steve Bertok, Steven Christopher

2021-02-01 T4 Change part numbers on BRZ, FRS lines in T4

#30104 from Touring Committee · Rule change · TB 21-02 (2021-02 Fastrack)

neutralT4 Scion FR-S, Subaru BRZ, and Toyota 86 replace Eibach part 4.10582.880 with 82105.320, 4.10582 and SPC 67660.

In T4 Spec Lines, change Notes as follows:
Scion FR-S/10 series (13-16): "Eibach ~~4.10582.880~~ 82105.320, 4.10582 and SPC 67660 allowed."
Subaru BRZ/ BRZ Limited (13-16): "Eibach ~~4.10582.880~~ 82105.320, 4.10582 and SPC 67660 allowed."
Subaru BRZ (17-21): "Eibach ~~4.10582.880~~ 82105.320, 4.10582 and SPC 67660 allowed."
Toyota 86, GT (17-21): "Eibach ~~4.10582.880~~ 82105.320, 4.10582 and SPC 67660 allowed."

2021-02-01 T4 T4 Mustang Axle Ratio and Wheels

#30149 from Scotty White · Rule change · TB 21-02 (2021-02 Fastrack)

slowerT4 Ford Mustang V6 05-10 allows GT 8.8 rear axle with 3.45 or 3.55 ratio at +25 lb penalty.

In T4 Spec Lines, Ford Mustang V6 (05-10), add to Notes as follows:
"GT 8.8 rear axle assembly allowed. 3.45 or 3.55 final drive ratio allowed with +25lb penalty."

Applies to Ford Mustang V6 on this page: Paolo Salvatore, Richard Grunenwald, Matthew Miller

2021-03-01 T4 E & O T4 Mustang Wheels

#30245 from Touring Committee · Rule change · TB 21-03 (2021-03 Fastrack)

fasterT4 Ford Mustang V6 05-10 wheels increase from 17 to 18 inches.

In T4 Spec Lines, Ford Mustang V6 (05-10), change wheels as follows:
"17 18 x 8"

Applies to Ford Mustang V6 on this page: Paolo Salvatore, Richard Grunenwald, Matthew Miller

2021-04-01 T4 Request consistency review in GCR

#30263 from Randall Smart · Rule change · TB 21-04 (2021-04 Fastrack)

slowerT2-T4 clutch disc and pressure plate must be at least 95% of factory OEM weight.

In GCR, Section 9.1.9.2.D.1.i.5., change as follows:
"T2-T4 only: Any clutch disc and pressure plate of OEM diameter may be used, provided that they shall be bolted directly to an
unmodified stock flywheel and is no lighter than 95% of the factory OEM clutch disc and pressure plate."

2021-05-01 T4 Mini Cooper Spec Line Anomalies

#30478 from David Oliveira · Rule change · TB 21-05 (2021-05 Fastrack)

unclearT4 Mini Cooper S (02-04, 05-06) suspension/wheel rules simplified; (07-13) gear ratios changed to 3.31, 2.13, 1.48, 1.14, 0.95, 0.82, final drive to 3.65, brakes to 280 mm.

In T4 Spec Lines, Mini Cooper S (02-04), change Notes as follows:
"~~The following items must remain stock: shock/struts (including mounts), original wheels, and transmissiondifferential - unless~~
~~specified below. 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, and Mini~~
~~Mania strut tower plate NMS7300permitted. Factory limited slip from 05-06 Cooper S permitted. May de-camber wheels by the~~
~~useof 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.~~ Convertible model not allowed. Any
spring up to a maximum spring rate of 500 lbs. front and 800 lbs. rear may be used."
In T4 Spec Lines, Mini Cooper S (05-06), change Notes as follows:

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"~~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 6768 415 (R)33 53 6 768 418. May de-camber 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."
In T4 Spec Lines, Mini Cooper S (07-09), change as follows:
"(07-09 13)"
Gear Ratios:
"~~overall:12.79,7.79, 5.65,4.62, 3.83,3.13~~ 3.31, 2.13, 1.48, 1.14, 0.95, 0.82"
Final Drive:
"~~N/A~~ 3.65"
Brakes (mm):
"~~277~~ 280"

Applies to Mini Cooper S on this page: Trenton Kramer

2021-05-01 T4 Request CAI Mustang in T4

#30562 from Scotty B White · Rule change · TB 21-05 (2021-05 Fastrack)

fasterT4 Ford Mustang V6 05-10 now allows cold air intake.

In T4 Spec Lines, Ford Mustang V6 (05-10), add to Notes as follows:
"Cold Air Intake allowed."

Applies to Ford Mustang V6 on this page: Paolo Salvatore, Richard Grunenwald, Matthew Miller

2021-06-01 T4 Civic Type R Brake Rotors

#29817 from Touring Committee · Rule change · TB 21-06 (2021-06 Fastrack)

slowerT3 Honda Civic Type-R 2020+ allows brake rotor 45251-TGH-A01 with 25 lb penalty.

In T3 Spec Lines, Honda Civic Type-R(2017-), add to notes as follows:
"2020+ model years allowed part #45251-TGH-A01 with a 25lb penalty."

2021-07-01 T4 Wrong Part Number on 320i Spec Line

#30645 from chi ho · Rule change · TB 21-07 (2021-07 Fastrack)

neutralT4 BMW 320i 14-15 part number corrected from 20121.140 to E10-20-031-01-22.

In T4 Spec Lines, BMW 320i (14-15), change Notes as follows:
"~~20121.140~~ E10-20-031-01-22"

Applies to BMW 320i on this page: Chi Ho

2021-11-01 T4 Request to Classify 2014 VW Jetta 1.8t TSI

#30436 from Warren Williams · Rule change · TB 21-09 (2021-09 Fastrack)

neutralT4 Volkswagen Passat, Jetta 1.8T adds 2014 model year to eligible years.

In T4 Spec Lines, change as follows effective 11/1/21:
"Volkswagen Passat, Jetta 1.8T (2014-)"

2021-12-01 T4 Nissan Sentra SE-R Spec. V

#30958 from Michael Updegraff · Rule change · TB 21-12 (2021-12 Fastrack)

neutralNissan Sentra SE-R Spec V (2007–2012) newly classified in T4 at 3000 lbs minimum weight.

In T4 Spec Lines, classify Nissan Sentra SE-R Spec V (2007-2012) as follows:

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

2021-12-01 T4 Mazda RX-8 Spec Line Suspension Parts

#31113 from Josh Smith · Rule change · TB 21-12 (2021-12 Fastrack)

fasterT4 Mazda RX-8 04-12 allows alternate sway bars max 32mm front, 19mm rear; removes 60mm restrictor requirement.

In T4 Spec Lines, Mazda RX-8 Base/R3/Sport/ GT (04-12), change Notes as follows:
"Mazdaspeed radiator #0000-01-8501 allowed. Use of 2009 R3 transmission is permitted with alternate gear ratios as listed. R3
transmission must be paired with the listed alternate final drive. ~~Only Mazdaspeed front sway bar kit #0000-04-8302-AD~~
~~and~~ Mazdaspeed coil spring kit #QSEA34-01Z allowed. 60mm flat plate restrictor required~~. Alternate sway bar permitted,~~
~~Progressive Technologies Part Number: 61-0543 and 62.1152 allowed.~~ OE Rear spoiler allowed #F151-V4- 920F. OE front air dam
allowed #F151-V4-900f-BB. Eibach springs 0000-04-9700-08, 0000-04-9400-07, and 0000-04-9926 allowed. Alternate sway bars
allowed max 32mm (f) 19mm (r)."

2021-12-01 T4 Diverter Valve Plunger Upgrade

#31307 from Chi Ho · Rule change · TB 21-12 (2021-12 Fastrack)

neutralT4 BMW 320i (14-15) now allows GFB T9357 aluminum diverter valve.

In T4 Spec Lines, BMW 320i (14-15), add to notes the following:
"GFB T9357 aluminum diverter valve allowed."

Applies to BMW 320i on this page: Chi Ho

2021-12-01 T4 Adjust Honda FWD in T4 to encourage more Drivetrain Diversity

#31472 from Oscar Jackson · Rule change · TB 21-12 (2021-12 Fastrack)

fasterT4 Honda Civic FWD gets wider 8-inch wheels, 245 tyres max, and sway bar allowances to 29mm front, 22mm rear.

In T4 Spec Lines, Honda Civic Coupe & Sedan EX-T (16-17) Hatch LX & Sport (2016-), change as follows:
Wheel Size (in.): "17 x 7 8"
Tire Size (max): "~~235~~ 245"
Add to Notes: "Front sway bar allowed 29mm max. Rear Sway bar allowed 22mm max."

2021-12-01 T4 Touring 4 BOP adjustments for 2022

#31482 from Touring Committee · Rule change · TB 21-12 (2021-12 Fastrack)

slowerT4 multiple cars: Volkswagen Rabbit 2.5 (08-09) to 2675 lbs; Mazda MX-5/Club (06-15) to 2625 lbs; RX-8 to 3125 lbs; Honda/Acura/Chevy/Mazda wheel widths 7 to 8 inches.

In T4 Spec Lines, T4 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: ~~shock/struts (including mounts), original wheels, and~~ transmission differential - unless specified below."
In T4 Spec Lines, Volkswagen Rabbit 2.5 (08-09), change Weight as follows:
"~~2850~~ 2675"
In T4 Spec Lines, Ford Mustang V6 (05-10), add to Notes as follows:
"GT 8.8 rear axle assembly with 3.55 final drive allowed with +25lb penalty. 7.5 rear axle assembly with 3.45:1 final
drive allowed with +25lb penalty. Cold Air Intake allowed"

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In T4 Spec Lines, Mazda MX-5 / Club Model (06-15), change Weight as follows:
"~~2550~~ 2625"
In T4 Spec Lines, Mazda RX-8 Base/R3/Sport/ GT (04-12), change Weight as follows:
"~~3075~~ 3125"
In T4 Spec Lines, Honda Civic Coupe & Sedan EX-T(16-17)Hatch LX & Sport (2016-), change Wheel Size as follows:
"17 x 7 8"
In T4 Spec Lines, Honda Civic Si (06-11), change Wheel Size as follows:
"17 x 7 8"
In T4 Spec Lines, Honda Civic Si (12-13), change Wheel Size as follows:
"17 x 7 8"
In T4 Spec Lines, Honda Civic Si (14-15), change Wheel Size as follows:
"17 18 x 7 8"
In T4 Spec Lines, Acura RSX/RSX Type-S (02-06), change Wheel Size as follows:
"17 x 7 8"
In T4 Spec Lines, Chevrolet Cobalt SS, Sport Coupe (06-10, change Wheel Size as follows:
"17 x 7 8"
In T4 Spec Lines, Chevrolet Cobalt SS, Sport Coupe (06-10, add ) after date as follows:
"(06-10)"
In T4 Spec Lines, Mazda3 S (04-09), change Wheel Size as follows:
"17 x 7 8"
In T4 Spec Lines, Mazda3 S (10-13), change Wheel Size as follows:
"17 x 7 8"
In T4 Spec Lines, Mazda3 (14-18), change Wheel Size as follows:
"17 18 x 7 8"
In T4 Spec Lines, Volkswagen Rabbit 2.5 (06-07), change Wheel Size as follows:
"17 x 7 8"
In T4 Spec Lines, Volkswagen Rabbit 2.5 (08-09), change Wheel Size as follows:
"17 x 7 8"

Applies to Ford Mustang V6 on this page: Paolo Salvatore, Richard Grunenwald, Matthew Miller

Applies to Mazda MX-5 on this page: Ethan Barker, Kevin Fryer, Madin Workman, Connor Thomas, Michael Borden, Marc Cefalo, Steve Bertok, Steven Christopher, James Ebben, Richard Mooney, Brad Childs

2022-01-01 T4 Reply to letter 29879 T2-T4 Grill Openings

#31486 from Andrew Aquilante · Rule change · TB 22-01 (2022-01 Fastrack)

fasterT2-T4 clarified: grill opening area may increase max 16 sq in for radiator cooling only, retaining factory mesh shape.

In T2-T4, GCR section 9.1.9.2.D.8.a.8, clarify as follows:
"~~Exclusively for~~ For the sole purpose of engine radiator cooling ~~purposes~~, it is permitted to remove the outermost non-metallic
webbed false grill openings that are closed in mesh style factory grill openings. Maximum allowable increase in grill opening area
is 16 square inches. The modified grill opening mesh shape and contour must be retained as delivered from the manufacturer.
This allowance does not permit modification to dedicated brake-only or intercooler-only grill openings. (Note - It is the
competitor’s responsibility to be able to verify that 16 or fewer square inches have been removed.)"

2022-01-01 T4 Please Adjust 98-00 BMW 323 Min Weight to Reflect Current Class

#31595 from Griffin Gamcsik-Uly · Rule change · TB 22-01 (2022-01 Fastrack)

fasterT4 BMW 323 98-00 minimum weight drops to 3250 lbs, 50mm restrictor removed.

In T4 Spec Lines, BMW 323 (98-00), change as follows:
Weight: "~~3450~~ 3250"
Notes: "Up to 850lb. springs F/R permitted, 27mm front sway bar, 24mm rear sway bar permitted. ~~50mm flat plate restrictor~~
~~required.~~ M52TUB25 engine required."

2022-01-01 T4 Consolidate 12-13 and 14-15 Honda Civic Si spec lines for T4

#31596 from Griffin Gamcsik-Uly · Rule change · TB 22-01 (2022-01 Fastrack)

neutralT4 Honda Civic Si consolidates 12-13 and 14-15 into single 12-15 spec line with updated suspension allowances.

In T4 Spec Lines, Honda Civic Si (12-13), delete Spec Line in its entirety.
In T4 Spec Lines, Honda Civic Si (14-15), change as follows:
Model Year: "Honda Civic Si (14 12-15)"
Notes: "Transmission and Differential must be stock. Honda Sport Suspension Kit, part number 08W60- TS9-100 permitted. H&R
Sport Springs P/N 51891 and HPD part number (P/N51410F23SA00) allowed. 47mm flat plate restrictor required. ~~Camber plates~~
~~permitted.~~ SPC Rear Adjustable Control Arm – P/N 67467 or 67466 permitted. Sway bars up to 32mm front and rear permitted.
Springs allowed up to 700 pounds."

2022-01-01 T4 Request to clarify radiator hoses

#31682 from Touring Committee · Rule change · TB 22-01 (2022-01 Fastrack)

neutralT2, T3, T4 radiator and coolant hoses may be replaced with aftermarket options; coolant temp sensor modification permitted.

In GCR, Section 9.1.9.2.D.3.a., add the following:
"3. Radiator and coolant hoses may be replaced with aftermarket options. Modification for coolant temp sensors is permitted."

2022-01-01 T4 Clarify Permitted/Allowed

#31743 from Touring Committee · Rule change · TB 22-01 (2022-01 Fastrack)

neutralT2, T3, T4 clarify that spec lines listing permitted or allowed parts are alternatives to category rules, not replacements.

In GCR, Section 9.1.9.2.C.4., add the following"
"b. Spec lines may include modifications that are "permitted" or "allowed". This means that they are a permitted as alternatives
to the allowances written into the category rules. For example "Koni shock #xxxxxxx allowed" implies that you could use the Koni
option or any option that complies with the category rules."

2022-01-01 T4 Correct RSX wording

#31746 from Touring Committee · Rule change · TB 22-01 (2022-01 Fastrack)

fasterT4 Acura RSX/RSX Type-S 02-06 removes requirement that original wheels must remain stock.

In T4 Spec Lines, Acura RSX/ RSX Type-S (02-06), change Notes as follows:
"~~The following items must remain stock: original wheels.~~"

2022-01-01 T4 Camaro

#31751 from Touring Committee · Rule change · TB 22-01 (2022-01 Fastrack)

fasterT4 Chevrolet Camaro V-6 (96-02) removes requirement that shock/struts, mounts, and transmission differential remain stock.

In T4 Spec Lines, Chevrolet Camaro V-6 (96-02), change Notes as follows:
"~~The following items must remain stock: shock/struts (including mounts), and transmission differential unless specified below.~~"

2022-02-01 T4 MX-5 Durability Detailed

#31102 from CHRISTOPHER WINDSOR · Rule change · TB 22-02 (2022-02 Fastrack)

slowerT4 Mazda MX-5 Club 06-15 allows non-OEM LSD with +50 lbs penalty; removes stock transmission and differential requirements.

In T4 Spec Lines, Mazda MX-5 / Club Model (06-15), change Notes as follows:
"~~The following items must remain stock OEM unmodified, unless alternate part numbers are permitted below: transmission,~~
~~differential, and LSD.~~ 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

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allowed, RX8 front hubs PT# F189-33-04X allowed. The SM5 suspension (only) is allowed with a 100 lbs. weight increase. ~~Non-~~
~~OEM limited slip differential allowed with +50 lbs. weight penalty~~. 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. Non-OEM
limited slip differential allowed with +50 lbs. weight penalty."

2022-02-01 T4 Request Allowances for 2005 - 2010 Mustang

#31624 from Rich Grunenwald · Rule change · TB 22-02 (2022-02 Fastrack)

neutralT4 2005-2010 Ford Mustang V6 now specifies Koni damper part numbers 8741.1494 front and 8741.1240 rear.

In T4 Spec Lines, Ford Mustang V6 (05-10), add to Notes as follows:
"Koni part numbers 8741.1494 (front) and 8741.1240 (rear)."

Applies to Ford Mustang V6 on this page: Paolo Salvatore, Richard Grunenwald, Matthew Miller

2022-03-01 T4 Reply to letter #31486/29879 T2-T4 Grill openings

#31935 from Andrew Aquilante · Rule change · TB 22-03 (2022-03 Fastrack)

fasterT2-T4 grill openings may remove non-metallic webbed false sections; 16 square inch limit removed.

In T2-T4, GCR Section 9.1.9.2.D.8.a.8., change as follows:
"For the sole purpose of engine radiator cooling, it is permitted to remove the outermost non-metallic webbed false grill
openings that are closed in mesh style factory grill openings. ~~Maximum allowable increase in grill opening area is 16 square~~
~~inches.~~ The modified grill opening mesh shape and contour must be retained as delivered from the manufacturer. This allowance
does not permit modification to dedicated brake-only or intercooler-only grill openings. ~~Note - It is the competitor’s~~
~~responsibility to be able to verify that 16 or fewer square inches have been removed.~~"

2022-03-01 T4 BRZ vs BRZ TS

#32022 from Touring Committee · Rule change · TB 22-03 (2022-03 Fastrack)

neutralT3 Spec Lines Subaru BRZ TS (13-21) added to class specification wording.

In T3 Spec Lines, Subaru BRZ TS (13-21), change car as follows:
"Subaru BRZ, BRZ TS (13-21)”
Appendix P. Racing Room & Passing Guidelines
Revised January 2022
The Club Road Racing Program sincerely thanks Randy Pobst and Terry Earwood for developing these
guidelines defining racing room and passing etiquette. Randy Pobst is a SCCA Hall of Fame member, a National
Road Racing and Solo Champion, professional driver champion, and a very experienced driver’s coach. Terry
Earwood is a legendary Skip Barber driver instructor, professional driver champion, professional driver’s coach,

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and is the current Driver Orientation Manager for the Trans Am Series.
The guidelines were created by Randy and Terry based on decades of racing experience and driver coaching.
The guidelines represent what the Club Road Racing Program’s intent is for General Competition Rules Section
6.11., Rules of the Road.
1. Racing Room & Passing Guidelines
Safe, successful passing is based on what drivers can see. An overtaking car bears the largest percentage of
responsibly for passing safely.
2. Peripheral Vision
The overtaking car (the car attempting a pass) must get into the peripheral vision of the lead car (the car being
passed) in the brake zone before the lead car turns for the corner. Once the lead car turns for the corner, it
can no longer see the trailing car, because the lead car’s mirrors now point outside, and the lead car is looking
toward the apex.
Figure 1
Figure 1 shows that the overtaking car has gotten up to the A pillar and into the peripheral view of the lead car
before turn in. The overtaking car now has taken the line away and earned the right to racing room on the
inside.
To earn the corner, the overtaking car must have its front end up to at least the A pillar post, or windshield,
with the car under control, before the lead car turns into the corner. The goal is for the overtaking car to
present itself, to arrive in the peripheral vision of the lead car, before it turns in.
Open Wheel and Sports Racer Overlap
An overtaking open‐wheel car or sports racer should have its leading edge of the front tire up to at least the
lead car’s trailing edge of the front tire (within the leading car peripheral vision) before the lead car begins its
turn in (Figure 2). The bodywork configuration of many new formula and sports racer prototypes almost
encapsulate the driver from view by other drivers. That is why it is important to get the overtaking car that far
up into the lead car’s peripheral vision.
Figure 2
3. The Blind Spot
Figure 3
Figure 3 shows at the lead car’s turn in point the overtaking car has yet to get even with the A pillar and into
the peripheral vision of the lead car. The overtaking car is in a blind spot. Do not pass unless the lead car is
much slower and gives racing room.
4. Racing Room
Should the lead car decide to ‘go with him’, side‐by‐side, then both cars must allow each other racing room, at
least a car width plus six inches or so, to the edges of the racing surface. In both cases, the trailing car must be
in the lead car’s peripheral vision to safely hold position. If not in vision, then the trailing car must back off and
follow, because the lead car cannot see it.
The biggest mistake, and a common cause of contact, is the overtaking car taking a shortcut to the apex, from
that blind spot (Turn One at Road Atlanta is classic). Pull parallel to the lead car, and as close as safely possible
so that he KNOWS you are there. Sometimes, the lead car may turn in early; therefore, the overtaking car
must be under enough control to avoid contact.
5. Passing on Straights
On straights, the lead car is allowed “one safe move” (Figure 4). It can choose a side, but cannot move back,
and cannot move over in reaction to an overtaking car if late enough to invite contact. It must leave a car’s
width (plus 6 inches) of racing room if the overtaking car has already committed in that direction and has
achieved an overlap next to the leader. No weaving to break the draft or to block; that is more than one move.
On straights, as opposed to corner entry, it is possible for the lead car to look into its mirrors and see the
overtaking car, so if the overtaking car gets even a small overlap next to the lead car, the lead car must give the
overtaking car room to race, and can no longer move across the track.
Figure 4
When being passed, hold your line. This means be predictable, and do not change your line to pull out of the
way. ‘Hold your line’ does not mean take the line for the apex and turn in front when a much faster car is
approaching. Be aware of faster traffic and leave a lane of racing room for them.
6. Overlap on Straights at Turn In
If there is continuous overlap (Figure 5) next to the lead car when the turn in point is reached, the lead car
must give the trailing car room to race. The lead car can no longer move completely down to the apex. It is not
ok to cut across to the apex and likely into the trailing car’s nose. The car was there all the way down the
straight and it is not going to suddenly disappear. There now is shared responsibility to avoid contact between
the cars.
Figure 5
7. The Vortex of Danger
The Entry Vortex of Danger (Figure 6) is a triangle inscribed by the turn‐in point of the lead car, the apex, and
the inside edge of the road. Trailing car, do not take a short cut to the apex. If you do, chances are the lead car
does not see you. When overtaking, keep out of the Vortex of Danger. It is too late to pass. The hole you see
is closing rapidly, you are in a blind spot, there will likely be contact, and it will be your fault.
Figure 6
The Exit Vortex of Danger (Figure 7) is a triangle inscribed by the apex, the track‐out point of the lead car, and
the outside edge of the road. When attempting a pass on the outside, be aware of the Exit Vortex of Danger,
and back out of it if not in the lead car’s vision. It is too late to safely pass. The hole you see on the outside is
closing rapidly, you are in a blind spot, there will likely be contact, and it will be your fault.
Figure 7
8. The Outside Pass
Figure 8
On this outside pass attempt (Figure 8), the overtaking outside car never presents itself into the vision of the
lead car and cannot expect it to make room for a car it cannot see at the exit of the turn. So, the outside
trailing car must back off to leave racing room for the inside lead car that cannot see it and avoid the Exit
Vortex of Danger. In this situation, if the outside car makes contact or runs off the road, it is most likely their
fault.
Turn 5 at Road America is a prime example of where a lead car may protect his line by not using all the track on
the right. The overtaking car, in this example, needs to clearly 'present himself' in the braking zone before turn
in, because the lead car is looking into the corner, not at his right mirror, and in all probability will not leave
racing room at the exit. Outside passing works well when both drivers have excellent spatial awareness but is
a very low percentage move in most cases.
Safe, successful passing depends on what a driver can see. Do not hit what you can see!

2022-04-01 T4 Request to Allow the Use of Aftermarket ECU's in Touring

#31067 from Harley Kaplan · Rule change · TB 22-04 (2022-04 Fastrack)

slowerT2-T4 cars model year 2018+ may use non-OEM ECU with 75 lb weight penalty via spec line adjustment.

In T2-T4, GCR Section 9.1.9.2., Introduction, add 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.
Note-Model year cars 2018 or later may request a spec line adjustment which permits use of a non-oem ECU with a 75# weight
addition.”

2022-04-01 T4 Request JWT BSR Kit for 02-06 Nissan Sentra SE-R/Spec V

#31685 from Griffin Gamcsik-Uly · Rule change · TB 22-04 (2022-04 Fastrack)

fasterT4 Nissan Sentra SE-R Spec V 02-06 now permits balance shaft removal kit OQR25-NOBAL.

In T4 Spec Lines, Nissan Sentra SER Spec-V (02-06), add to Notes the following:
"Balance shaft removal kit- OQR25-NOBAL permitted."

2022-04-01 T4 Please Confirm Touring 4 (98-00) BMW 323 is E46 generation

#31972 from Griffin Gamcsik-Uly · Rule change · TB 22-04 (2022-04 Fastrack)

unclearT4 BMW 323 (98-00) wheelbase increases to 2725 mm, final drive ratio changes to 3.07.

In T4 Spec Lines, BMW 323 (98-00), change Wheelbase and Final Drive as follows:
Wheelbase: "~~2700~~ 2725"
Final Drive: "~~2.93~~ 3.07"

2022-04-01 T4 RX-8 Spring Part Numbers (E&O)

#32151 from Josh Smith · Rule change · TB 22-04 (2022-04 Fastrack)

neutralT4 Mazda RX-8 04-12 gains Eibach spring alternatives to Mazda Motorsports springs front and rear.

In T4 Spec Lines, Mazda RX-8 Base/R3/Sport/ GT (04-12), change Notes as follows:
"Mazdaspeed radiator #0000-01-8501 allowed. Use of 2009 R3 transmission is permitted with alternate gear ratios as listed. R3
transmission must be paired with the listed alternate final drive. Mazdaspeed coil spring kit #QSEA-34-01Z allowed. 60mm flat
plate restrictor required. OE Rear spoiler allowed #F151-V4-920F. OE front air dam allowed #F151-V4-900f-BB. ~~Eibach springs~~
~~0000- 04-9700-08, 0000-04-9400-07,~~ Springs Allowed: (F) Mazda Motorsports- 0000- 04-9700-08 or Eibach- 0800.250.0700 (R)
Mazda Motorsports- 0000-04-9400-07 or Eibach 0700.250.0400, and Helper 0000-04-9926 allowed. Alternate sway bars allowed
max 32mm (f) 19mm (r)."

2022-04-01 T4 04-09 Mazda3 Tire Limit Clarification

#32249 from Chris Taylor · Rule change · TB 22-04 (2022-04 Fastrack)

fasterT4 Mazda3 04-09 tire size increases from 235 to 245.

In T4 Spec Lines, Mazda3 s (04-09), change Tire Size as follows:
"~~235~~ 245"

2022-04-01 T4 Shock Part Number Errors & Omissions

#32252 from Rich Grunenwald · Rule change · TB 22-04 (2022-04 Fastrack)

neutralT4 Ford Mustang V6 05-10 shock part numbers corrected to 8741-1494SPORT front and 8241-1240SPORT rear.

In T4 Spec Lines, Ford Mustang V6 (05-10), change Notes as follows:
"Koni part numbers ~~8741.1494~~ 8741-1494SPORT (front) and ~~8741.1240~~ 8241-1240SPORT (rear)."

Applies to Ford Mustang V6 on this page: Paolo Salvatore, Richard Grunenwald, Matthew Miller

2022-04-01 T4 Update Solo Spec Coupe to latest '20 specs for Road Racing

#32262 from Benjamin Bunk · Rule change · TB 22-04 (2022-04 Fastrack)

unclearT4 Scion FR-S and Subaru BRZ Solo Spec Coupes updated to 2020 specifications Rev 7/20.

In T4 Spec Lines, Scion FR-S Solo® Spec Coupe (13-16), change Notes as follows:
"Modifications limited to ~~2018~~ 2020 SCCA® Solo® Spec Coupe Official Specifications~~, dated 1-30-2018~~ Rev 7/20."
In T4 Spec Lines, Subaru BRZ Solo® Spec Coupe (13-16), change Notes as follows:
"Modifications limited to ~~2018~~ 2020 SCCA® Solo® Spec Coupe Official Specifications~~, dated 1-30-2018~~ Rev 7/20."

Applies to Scion FR-S on this page: Izzy Sanchez, Tony Kiratsous, Roldan de Guzman, Colin Koehler

Applies to Subaru BRZ on this page: Nick Leverone

2022-04-01 T4 Request 2016 Mazda MX5 springs

#32265 from Brian Price. · Rule change · TB 22-04 (2022-04 Fastrack)

slowerT4 2016–18 Mazda MX-5 Miata/Club gains 100 lbs. for approved suspension package with specific springs.

In T4 Spec Lines, Mazda MX-5 Miata/Club (16-18), add to Notes the following:
"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)."

Applies to Mazda MX-5 on this page: Michael Borden, Marc Cefalo, Steve Bertok, Steven Christopher

2022-05-01 T4 Request to Add Spec Line for 2004-2009 Mazda3 i 2.0

#32395 from Michael Ogren · Rule change · TB 22-05 (2022-04 Fastrack)

neutralT4 Mazda3 i 2.0L added as spec line with 1999cc displacement and 2425 lbs minimum weight.

In T4 Spec Lines, Mazda 3 S (04-09), change as follows:
Bore x Stroke(mm)/ Displ. (cc): "87.5 x 94.0 2260 or 87.5 x 83.1 1999"
Weight (lbs): "2.3l 2500, 2.0l 2425"

Applies to Mazda 3-S on this page: Leann Falk

2022-05-01 T4 Request Alternate Front & Rear Strut/Shock Top Hats

#32452 from Raymond Blethen · Rule change · TB 22-05 (2022-04 Fastrack)

neutralT2-T4 Touring cars with alternative springs may use performance top hats with spherical bearings on shocks and struts.

In TOURING (T2-T4) CATEGORY, GCR Section 9.1.9.2.D.5.b.2, add the following:
"f. Cars with an alternative spring allowance are permitted to use performance alternative top hats on shocks and struts. These
top hats are permitted to utilize spherical bearings."

2022-06-01 T4 Request Wider Wheels for Hyundai Tiburon

#32536 from Kyle Keenan · Rule change · TB 22-06 (2022-06 Fastrack)

fasterT4 Hyundai Tiburon V-6 wheel width increases from 7 to 8 inches at 17-inch diameter.

In T4 Spec Lines, Hyundai Tiburon V-6 (03-08), change Wheel Size as follows:
"17 x 7 8"

2022-08-01 T4 04-09 Mazda3 Balance Shaft Delete Kit

#32795 from Chris Taylor · Rule change · TB 22-08 (2022-08 Fastrack)

neutralT4 Mazda3 04-09 now permits Corksport balance shaft delete kit GEN-6-504-10.

In T4 Spec Lines, Mazda3 s (04-09), add to Notes the following:
"Corksport balance shaft delete part# GEN-6-504-10 permitted."

2022-10-01 T4 Another 2022 BRZ/86 T3 request

#32945 from Touring Committee · Rule change · TB 22-10 (2022-10 Fastrack)

slowerT3 Subaru BRZ 2022- minimum weight up to 2975 lbs; spring rate to 1000 F/R, brake parts allowed without penalty.

In T3 Spec Lines, Subaru BRZ (2022-), change as follows:
Weight: "~~2750~~ 2975"
Notes: "Any spring up to ~~750~~ 1000 F/R permitted. Front strut tower brace permitted. SPC or SPL rear lower control arms
permitted. Cold air intake allowed. Subaru brake parts 26292CA070 & 26292CA060 allowed ~~with 100 lb penalty~~."

2022-12-01 T4 T4 mustang

#32789 from Scotty B White · Rule change · TB 22-12 (2022-12 Fastrack)

fasterT4 Ford Mustang V6 (05-10) wheels widen to 18x9, front brakes grow to 314mm vented, weight drops to 3275 lbs.

In T4 Spec Lines, Ford Mustang V6(05-10), change as follows:
Wheel size: "18x8 9"
Brakes: "(F) ~~292~~ 314 Vented Disc (R) 299.8 Vented Disc"
Weight: "~~3300~~ 3275"
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:
22mm permitted. Aftermarket Shocks conforming to T4 rules allowed. Panhard bar, part # BAR-M4264-A permitted or any pan

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Applies to Ford Mustang V6 on this page: Paolo Salvatore, Richard Grunenwald, Matthew Miller

2022-12-01 T4 Mazda OEM LSD was letter 32655

#32933 from Touring Committee · Rule change · TB 22-12 (2022-12 Fastrack)

fasterT4 Mazda MX-5 Club (06-15) minimum weight drops 25 lbs to 2600; Mazda LSD #32655 now permitted without penalty.

In T4 Spec Lines, Mazda MX-5 / Club Model (06-15), change as follows:
Weight: "~~2625~~ 2600"
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

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hubs PT# F189-33-04X allowed. The SM5 suspension (only) is allowed with a 100 lbs. weight increase. Allow Mazda header part
numbers 0000-06-5407 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."

2023-01-01 T4 Allowable Springs and Sway Bars for 06-11 Civic si Spec Line

#33294 from Mathew Milford · Rule change · TB 23-01 (2023-01 Fastrack)

fasterT4 Honda Civic Si 06-11 now permits 32mm sway bars front and rear and 700 pound springs.

In T4 Spec Lines, Honda Civic Si (06-11), add to Notes as follows:
"Sway bars up to 32mm front and rear permitted. Springs allowed up to 700 pounds."

2023-01-01 T4 Touring (T2-T5) Category

#33617 from Club Racing Board · Rule change · TB 23-01 (2023-01 Fastrack)

neutralT5 class added as regional-only; T5 tyres maximum width 225, minimum aspect ratio 45.

In GCR, CARS AND EQUIPMENT, section 9.1.9. TOURING CATEGORY CLASSES: add the following:
"Touring 5 (T5)"
In GCR, Section 9.1.9.2. Touring (T2-T5) Category, 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-T5 cars may race one class up in touring classes above their specification line class as long as they are a
legal T2-T4 5 car and conform to their specification line allowances as classified. T5 is a Regional only class."
In GCR, Section 9.1.9.2.D.1.i.5., change as follows:
"T2-T4 5 only:"

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In GCR, Section 9.1.9.2.D.7.b., add as follows:
"~~T5 has a maximum tire size of 225/45~~. T5 has a maximum tire width of 225 and a minimum aspect ratio of 45."

2023-01-01 T4 ENO 9.1.9.2.D.1.e.1.a.

#33651 from Club Racing Board · Rule change · TB 23-01 (2023-01 Fastrack)

neutralT2-T5 Touring front and rear suspension maximum negative camber changed to 3.5 degrees.

In GCR Touring (T2-T5) Category Specifications, Section 9.1.9.2.D.1.e.1.a, change as follows:
"A maximum of 3.5 degrees of negative ch amber is allowed on front and rear suspensions."

2023-02-01 T4 2019-2021 Mazda MX5 ND2

#32027 from Touring Committee · Rule change · TB 23-02 (2023-02 Fastrack)

neutralT4 Mazda MX-5 ND2 (19-21) classified: 1998cc, 2309mm wheelbase, 225 max tires, 2800 lbs.

In T4 Spec Lines, classify Mazda MX-5 Miata/Club/ RF (19-21) as follows:

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

2023-02-01 T4 Mustang OEM Grill Request

#33333 from Norm Benson · Rule change · TB 23-02 (2023-02 Fastrack)

neutralT2/T3 Mustang GT 5.0L and V6 (11-14) may remove upper grille fog lights, replace with mesh or screen.

In T2 Spec Lines, Ford Mustang GT 5.0L (11-14), add to Notes the following:
"Upper grille fog lights may be removed and replaced with mesh or screen."
In T2 Spec Lines, Ford Mustang V6 (11-14), add to Notes the following:
"Upper grille fog lights may be removed and replaced with mesh or screen."
In T3 Spec Lines, Ford Mustang V6 (11-14), add to Notes the following:
"Upper grille fog lights may be removed and replaced with mesh or screen."

2023-02-01 T4 Mazda OEM LSD was letter 32655 typo

#33666 from Touring Committee · Rule change · TB 23-02 (2023-02 Fastrack)

neutralT4 Mazda MX-5 Club Model 06-15 Mazda Motorsports LSD part number corrected from 32655 to 0000-02-5564.

In T4 Spec Lines, Mazda MX-5 / Club Model (06-15), change Notes as follows:
"Mazda Motorsports LSD ~~#3265~~ 5 0000-02-5564 permitted without penalty."

2023-03-01 T4 BMW 320I intercooler

#33762 from Chi Ho · Rule change · TB 23-03 (2023-03 Fastrack)

fasterT3 BMW 320I now permitted to use aftermarket intercooler.

In T3 Spec Lines, BMW- 320I, add to Notes the following:
"Aftermarket intercooler permitted."

2023-04-01 T4 Request to Classify 2004-2008 Acura TSX in T4

#33590 from William Phee · Rule change · TB 23-04 (2023-04 Fastrack)

neutralAcura TSX 2004-2008 newly classified in T4 at 3000 lbs minimum weight with 2354cc engine.

In T4 Spec lines, classify Acura TSX (2004-2008) as follows:

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

2023-04-01 T4 T4 Mustang Brakes/Swaybar

#34036 from Scotty B White · Rule change · TB 23-04 (2023-04 Fastrack)

fasterT4 Mustang rear sway bar increases from 22mm to 28mm permitted.

In T4 Spec Lines, Ford Mustang (2005-2010), change Notes as follows:
"Any sway bar up to F: 35mm and R: ~~22mm~~ 28mm permitted."

Applies to Ford Mustang V6 on this page: Paolo Salvatore, Richard Grunenwald, Matthew Miller

2023-06-01 T4 05-06 Mini Wheel Weight

#34112 from Mav Singh · Rule change · TB 23-06 (2023-05 Fastrack)

fasterT4 Mini Cooper S all years now run 17-inch wheels, up from 16, with wider rims to 8 inches.

In T4 Spec Lines, Mini Cooper S (02-04), change as follows:
Wheel Size: "~~16 x 7~~ 17 x 8"
Add to Notes: "Wheels conforming to B-spec rules are permitted."
In T4 Spec Lines, Mini Cooper S (05-06), change as follows:
Wheel Size: "~~16 x 7~~ 17 x 8"
Add to Notes: "Wheels conforming to B-spec rules are permitted."
In T4 Spec Lines, Mini Cooper S (07-13), change as follows:
Wheel Size: "17 x 7 8"

Applies to Mini Cooper S on this page: Trenton Kramer

2023-06-01 T4 06-09 VW Rabbit

#34153 from Cameron Conover · Rule change · TB 23-06 (2023-05 Fastrack)

slowerT4 Volkswagen Rabbit 2.5 (06-09) consolidates 06-07 and 08-09 models; Integrated Engineering intake allowed with 25lb penalty.

In T4 Spec Lines, delete Volkswagen Rabbit 2.5 (06-07) in its entirety and change Volkswagen Rabbit 2.5 (08-09) as follows:
"Volkswagen Rabbit 2.5 (08 06-09)"
Add to Notes: "Integrated Engineering intake IEIMVB1-BK allowed with 25lb penalty."

2023-06-01 T4 96-01 Audi a4 2.8 Spring Rate

#34217 from Michael Gordhamer · Rule change · TB 23-06 (2023-05 Fastrack)

fasterT4 Audi A4 2.8 V6 wheels grow to 17x8, tyres to 245, springs now 800lb with 32mm sway bars.

In T4 Spec Lines, Audi A4 V-6 (96-01) / Volkswagen Passat 2.8 V6 (96-05), change as follows:
Wheel Size: "~~16 x 7~~ 17 x 8"
Tire Size: "~~225~~ 245"
Notes: "~~The following items must remain stock: shock/struts (including mounts), original wheels, and transmission differential -~~
~~unless specified below.~~ 800lb springs allowed. Front and rear sway bars permitted 32mm max."

2023-07-01 T4 2002-2006 Mini Cooper S R53 Spec Line Request

#34336 from Aaron Fitzsimmons · Rule change · TB 23-06 (2023-07 Fastrack)

fasterT4 Mini Cooper S R53 loses 50 lbs, to 2700 for both 02-04 and 05-06 model years.

In T4 Spec Lines, Mini Cooper S (02-04), change Weight as follows:
"~~2750~~ 2700"
In T4 Spec Lines, Mini Cooper S (05-06), change Weight as follows:
"~~2750~~ 2700"

Applies to Mini Cooper S on this page: Trenton Kramer

2023-08-01 T4 Rules Clarification for Mazda RX8 Spec Line

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

neutralT3 Mazda RX-8 removes transmission/final drive pairing requirement; T4 removes same requirement, adds Mazdaspeed radiator and coil spring kit.

In T3 Spec Lines, Mazda RX-8 Base/R3/Sport/ GT (04-12), change notes as follows:
"~~Use of 2009 R3 transmission is permitted with alternate gear ratios as listed. R3 transmission must be paired with the listed~~
~~alternate final drive.~~ Front sway bar permitted 32mm MAX rear sway bar 19 MAX, Front springs max 750, 500 rear. Cold air
intake permitted. Header permitted. Aftermarket flywheel and single disc clutch permitted with no weight penalty."
In T4 Spec Lines, Mazda RX-8 Base/R3/Sport/ GT (04-12), change notes as follows:
"Mazdaspeed radiator #0000-01-8501 allowed. ~~Use of 2009 R3 transmission is permitted with alternate gear ratios as listed. R3~~
~~transmission must be paired with the listed alternate final drive.~~ Mazdaspeed coil spring kit #QSEA-34-01Z allowed. 60mm flat
plate restrictor required. OE Rear spoiler allowed #F151-V4-920F. OE front air dam allowed #F151-V4-900f-BB. Springs Allowed:

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(F) Mazda Motorsports- 0000- 04-9700-08 or Eibach- 0800.250.0700 (R) Mazda Motorsports- 0000-04-9400-07 or Eibach
0700.250.0400, and helper 0000-04-9926 allowed. Alternate sway bars allowed max 32mm (f) 19mm (r)."

2023-08-01 T4 rule book corrections

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

fasterT3 BMW 320i (14-15) gains aftermarket intercooler permission; T4 loses it.

In T3 Spec Lines, BMW 320i (14-15), add to Notes the following:
"Aftermarket intercooler permitted."
In T4 Spec Lines, BMW 320i (14-15), remove from Notes the following:
"~~Aftermarket intercooler permitted.~~"

Applies to BMW 320i on this page: Chi Ho

2023-08-01 T4 Ride Height Correction for the T3 Solstice.

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

neutralT3 Pontiac Solstice GXP minimum ride height set to 3 inches.

In T2 Spec Lines, Pontiac Solstice GXP Coupe / Convertible (07-09), add to Notes the following:
"Minimum ride height is 3 inches."
In T3 Spec Lines, Pontiac Solstice GXP Coupe / Convertible (07-09), add to Notes the following:
"Minimum ride height is 3 inches."

2023-09-01 T4 Inclusion of similar car. (CLK 320)

#34626 from Patrick Morgan · Rule change · TB 23-09 (2023-09 Fastrack)

neutralT4 Mercedes Benz CLK 320 Coupe model years expand to 2000-2007, C320 Sedan added.

In T4 Spec Lines, Mercedes Benz CLK 320 Coupe (2004), change as follows:
"Mercedes Benz CLK 320 Coupe, C320 Sedan (~~2004~~ 2000-2007)

2024-01-01 T4 Mazda MX-5 ND1 Spec Line Request

#34232 from Josh Smith · Rule change · TB 24-01 (2024-01 Fastrack)

slowerT4 Mazda MX-5 ND1 minimum weight increases 50 lbs to 2700; suspension springs now allow up to 500 lb front, 300 lb rear.

In T4 Spec Lines, Mazda MX-5 Miata/Club/ RF (16-18), change as follows:
Weight: "~~2650~~ 2700"
Notes: "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

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springs allowed. Mazda Motorsports Header part #0000-06-5410 allowed. Mazda tower brace 0000-04-5626 allowed."

2024-01-01 T4 BRZ/FRS/86 Spring Allowance

#35038 from Luis Goncalves · Rule change · TB 24-01 (2024-01 Fastrack)

neutralT4 BRZ/FRS/86 spring allowance clarified: 225 lb front and 300 lb rear springs permitted; non-OEM LSD allowed with +50 lbs penalty.

In T4 Spec Lines, Scion FR-S/10 series (13-16), change Notes as follows:
~~"Eibach 82105.320, 4.10582 and SPC 67660 allowed.~~ Eibach 82105.320 sway bar kit allowed. Eibach 4.10582 springs or 225 lb (f)
and 300 lb (r) springs allowed. SPC 67660 allowed. Front strut tower brace allowed. Raceseng, part # raceseng-ft86-r-shock-top
permitted. Non-OEM limited slip differential allowed with +50 lbs. weight penalty. 55mm flat plate restrictor required. Only 17”
wheels permitted."
In T4 Spec Lines, Subaru BRZ/ BRZ Limited (13-16), change Notes as follows:
"~~Eibach 82105.320, 4.10582 and SPC 67660 allowed.~~ Eibach 82105.320 sway bar kit allowed. Eibach 4.10582 springs or 225 lb (f)
and 300 lb (r) springs allowed. SPC 67660 allowed. Front strut tower brace allowed. Raceseng, part # raceseng-ft86-r-shock-top

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permitted. Non-OEM limited slip differential allowed with +50 lbs. weight penalty. 55mm flat plate restrictor required. Only 17”
wheels permitted."
In T4 Spec Lines, Subaru BRZ (17-21), change Notes as follows:
"~~Eibach 82105.320, 4.10582 and SPC 67660 allowed.~~ Eibach 82105.320 sway bar kit allowed. Eibach 4.10582 springs or 225 lb (f)
and 300 lb (r) springs allowed. SPC 67660 allowed. Front strut tower brace allowed. Raceseng, part # raceseng-ft86-r-shock-top
permitted. Non-OEM limited slip differential allowed with +50 lbs. weight penalty. 55mm flat plate restrictor required. Only 17”
wheels permitted."
In T4 Spec Lines, Toyota 86, GT (17-21), change Notes as follows:
"~~Eibach 82105.320, 4.10582 and SPC 67660 allowed.~~ Eibach 82105.320 sway bar kit allowed. Eibach 4.10582 springs or 225 lb (f)
and 300 lb (r) springs allowed. SPC 67660 allowed. Front strut tower brace allowed. Raceseng, part # raceseng-ft86-r-shock-top
permitted. Non-OEM limited slip differential allowed with +50 lbs. weight penalty. 55mm flat plate restrictor required. Only 17”
wheels permitted."

Applies to Subaru BRZ on this page: Nick Leverone

Applies to Toyota 86 on this page: Chip Herr, John Heinricy

2024-01-01 T4 TSX Allowance

#35219 from Oscar Jackson · Rule change · TB 24-01 (2024-01 Fastrack)

fasterT4 Acura TSX 2004-2008 now allows header.

In T4 Spec Lines, Acura TSX (2004-2008), add to Notes the following:
"Header allowed."

2024-01-01 T4 Requested Update of Model Years of 370Z

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

neutralT3 Nissan 370Z model years expanded to include NISMO Edition through 2022.

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

2024-02-01 T4 More Car Lightening Stuff

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

fasterT2, T3, T4 battery replacement wording simplified; OEM weight tolerance requirement removed.

In GCR, Section 9.1.9.2.D.1.g.3., change as follows:
"Batteries may be replaced provided the replacement is capable of starting the car. Batteries may not be relocated
unless noted on the spec line. Batteries must be adequately secured. Battery labeling must conform to 9.3.35.D. ~~with~~
~~those of an alternate manufacturer, provided they are of similar amp-hour capacity, size and within 10% of OEM~~
~~weight.~~"

2024-02-01 T4 ND Missed Items

#35352 from Touring Committee · Rule change · TB 24-02 (2024-02 Fastrack)

neutralT4 Mazda MX-5 Miata/Club (16-18) and (19-21) permitted to replace 3rd and 4th gears with specific parts.

In T4 Spec Lines, Mazda MX-5 Miata/Club (16-18), add to Notes the following:
"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)."
In T4 Spec Lines, Mazda MX5 Miata/Club/ RF (19-21), add to Notes the following:
"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)."

Applies to Mazda MX-5 on this page: Michael Borden, Marc Cefalo, Steve Bertok, Steven Christopher

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

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

neutralT4 now permits C-Spec cars to compete alongside B-Spec cars.

In GCR, Section 9.1.9.2., change as follows:
"Touring car eligibility: Cars are eligible for the class they are listed with a specification line and with the specific
allowances permitted. In addition, T2-T4 cars may race one class up in touring classes above their specification line class
as long as they are a legal T2-T4 car and conform to their specification line allowances as classified. Cars conforming to
C-Spec rules are permitted to compete in Touring 4."

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

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

neutralT2-T4 spec lines for 46 cars expire 12/31/24; appeal required to continue.

In T2-T4 Spec Lines, add **This Spec line will expire 12/31/24, Please submit to appeal**
to Notes to the following Spec Lines:
T2:
Acura TL SHAWD (10-13)
Audi S4 (12-14)
Audi S5 (13-14)
Audi TT RS (2018-)
Cadillac ATS-V (16-17)

Show 46 more lines

Cadillac CTS-V (06-07)
Chevrolet Camaro SS (98-02)
Honda Civic (2017-)
Saturn Sky / Convertible (07-09)
Subaru Impreza WRX STi (03-07)
Subaru Impreza WRX STi (08-11)
T3:
Audi S4 (10-11)
Audi S4 (12-14)
Audi TTS Coupe (10-11)
Cadillac ATS (2015)
Chevrolet Cobalt (05-07)
Dodge SRT-4 (03-05)
Ford Fiesta ST (2014-)
Hyundai Genesis Coupe (2010-)
Hyundai Veloster Turbo (18-21)
Mazda RX-8 Base/R3/Sport/ GT (04-12)
Mini Cooper S (2016-)
Subaru WRX (02-05)
Toyota Camry (11-15)
T4:
Acura Integra GS-R VTEC (3 or 4 door) (94-01)
Audi A4 V-6 (96-01) / Volkswagen Passat 2.8 V6 (96-05)
BMW 320i (14-15)
Chevrolet Cobalt SS, Sport Coupe (06-10)
Chevrolet Sonic RS (2011-)
Chrysler/Dodge Neon ACR SOHC (4 door) (01-02)
Dodge Dart (14-15)
Dodge/Plymouth Neon ACR SOHC/DOHC (2/4 door) (95-99)
Fiat 500 Abarth (12-14)
Ford Focus SVT (02-04)
Ford Focus ZX4 ST (05-06)
Ford Focus (08-11)
Ford Mustang V-6 (01-04)
Honda Accord LX & EX (03-07)
Honda Accord LX-S/EX/EX-L (08-12)
Honda Civic Coupe Si (99-00)
Honda Civic SI (02-03)
Hyundai Elantra GLS (11-12)
Hyundai Tiburon V-6 (03-08)
Hyundai Veloster Turbo/ R-Spec (14-15)
Kia Forte Koup and Sedan LX/EX (10-13)
Kia Forte Koup and Sedan SX (10-13)
Kia Forte Koup (14-15)
Mazda Protégé ES (2000)
Mazda Protégé 5 (02-03)

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 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 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 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: Michael Borden, Marc Cefalo, Steve Bertok, Steven Christopher

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)."

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~~

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~~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."

Applies to Mini Cooper S on this page: Trenton Kramer

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"

Runoffs 2024 → Runoffs 2025 2024-10-01 to 2025-09-29

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 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 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."

Applies to Mini Cooper S on this page: Trenton Kramer

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 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.

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.

Applies to Ford Mustang V6 on this page: Alex Lozano, Matt Spicuzzi, Scotty B White, Paolo Salvatore, Richard Grunenwald, Matthew Miller

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."

Applies to BMW 320i on this page: Chi Ho

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 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-

Show 4 more lines

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)."

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: Michael Borden, Marc Cefalo, Steve Bertok, Steven Christopher

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"

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: Michael Borden, Marc Cefalo, Steve Bertok, Steven Christopher

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)~~

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-)~~"

2025-02-01 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."

Applies to Ford Mustang V6 on this page: Alex Lozano, Matt Spicuzzi, Scotty B White, Paolo Salvatore, Richard Grunenwald, Matthew Miller

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.

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."

Applies to Ford Mustang V6 on this page: Alex Lozano, Matt Spicuzzi, Scotty B White, Paolo Salvatore, Richard Grunenwald, Matthew Miller

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.”

Applies to Ford Mustang V6 on this page: Alex Lozano, Matt Spicuzzi, Scotty B White, Paolo Salvatore, Richard Grunenwald, Matthew Miller

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"

Applies to Ford Mustang V6 on this page: Alex Lozano, Matt Spicuzzi, Scotty B White, Paolo Salvatore, Richard Grunenwald, Matthew Miller

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: Izzy Sanchez, Tony Kiratsous, Roldan de Guzman, Colin Koehler

Applies to Subaru BRZ on this page: Nick Leverone

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"

Runoffs 2025 → Runoffs 2026 2025-09-29 to 2026-09-28

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"

Applies to Mini Cooper S on this page: Trenton Kramer

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: Michael Borden, Marc Cefalo, Steve Bertok, Steven Christopher

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: Michael Borden, Marc Cefalo, Steve Bertok, Steven Christopher

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

Show 20 more lines

0000-06-5410 allowed."
In T4 Spec Lines, Mazda MX-5 Miata/Club (16-18), change Notes as follows:
"Factory bolt-in roll bar/ cross member may be removed to facilitate roll cage installation. Retractable hardtop option permitted
but must be disabled from moving action and positively fastened. Any OEM or aftermarket hardtop is permitted that retains the
OEM roof silhouette, including Mazda hardtop part #0000-07-5902-ND ~~and part #0000-07-5901 (discontinued DG Motorsports)~~.
29mm (f) 16mm (r) sway bars allowed. Up to 500lb front and 300lb rear springs allowed. Mazda Motorsports Header part
#0000-06-5410 allowed. Mazda tower brace 0000-04-5626 allowed. 3rd and 4th gear may be replaced with the following parts-
(0000-02-5803-02, 0000-02-5803-01, 0000-02-5804-02, 0000-02-5."
In T3 Spec Lines, Mazda MX-5 Miata (16-18), change Notes as follows:
"Factory bolt-in roll bar/ cross member may be removed to facilitate roll cage installation. Header permitted. Cold air intake
permitted. Front strut brace permitted. Front and rear sway bars permitted up to 35mm, Springs 800 front and 800 Rear max
permitted. Any OEM or aftermarket hardtop permitted that retains the OEM roof silhouette including Mazda hardtop part
#0000-07-5902- ND ~~and part #0000-07-5901 (discontinued DG Motorsports top).~~ If a hardtop is used, latches shall be replaced
with positive fasteners. Retractable hardtop option permitted but must be disabled from moving action and positively fastened.
In T3 Spec Lines, Mazda MX-5 Global Cup Miata (2016-2021) ND1, ND, change Notes as follows:
"Shoulder harness installation must conform to FIA mounting specifications that are approved for this vehicle per section 6.2 FIA
article 253, safety equipment. Must meet all ND2 MX-5 Global Cup rules. Any OEM or aftermarket hardtop is permitted that
retains the OEM roof silhouette, including Mazda hardtop Mazda hardtop part #0000-07-5902-ND and #0000-07-5902-ND ~~part~~
~~#0000- 07-5901 (discontinued DG Motorsports).~~ If a hardtop is used, latches shall be replaced with positive fasteners. OBD2
requirement does not apply. Ballast box may be removed. ND2s with sequential gearbox allowed +100 lbs.

Applies to Mazda MX-5 on this page: Michael Borden, Marc Cefalo, Steve Bertok, Steven Christopher

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 BMW Z4 on this page: Mario Carini, Ralph Porter

Applies to Ford Mustang V6 on this page: Alex Lozano, Matt Spicuzzi, Scotty B White, Paolo Salvatore, Richard Grunenwald, Matthew Miller

Applies to Pontiac Solstice on this page: Michael Dalton

Applies to Subaru BRZ on this page: Nick Leverone

Applies to Toyota 86 on this page: Chip Herr, John Heinricy

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.

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."

2026-02-01 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."

Applies to Ford Mustang V6 on this page: Paolo Salvatore, Richard Grunenwald, Matthew Miller

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."

2026-03-01 T4 ND MX-5 Spec Line Rewrite Request

#39802 from Josh Smith · Rule change · TB 26-03 (2026-03 Fastrack)

fasterT4 Mazda MX-5 19-24 drops 100 lbs to 2650; MX-5 16-18 drops 25 lbs to 2550.

In T4 Spec Lines, Mazda MX5 Miata/Club/ RF (19-24), change as follows:
Weight: "~~2750~~ 2650"
Notes: "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. ~~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, s~~ Suspension

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Permitted: Springs up to 500lb front and 300lb rear allowed. 29mm (f) 16mm (r) sway bars allowed. Mazda tower brace 0000-
04-5626 allowed. Mazda header 0000-06-5410 allowed. Gear kit Kit PT#- 0000-02-6100. 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). OEM Club Package Brembo
calipers permitted. 2016-2018 chassis/body permitted."
In T4 Spec Lines, Mazda MX-5 Miata/ Club (16-18), change as follows:
Weight: "~~2575~~ 2550"
Notes: “~~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 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, 0000-02-5804- 01). Gear kit Kit PT#- 0000-02-6100~~ 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. Suspension Permitted: Springs
up to 500lb front and 300lb rear allowed. 29mm (f) 16mm (r) sway bars allowed. Mazda tower brace 0000-04-5626 allowed.
Mazda header 0000-06-5410 allowed. Gear kit Kit PT#- 0000-02-6100. 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). OEM Club Package Brembo calipers
permitted."

Applies to Mazda MX-5 on this page: Michael Borden, Marc Cefalo, Steve Bertok, Steven Christopher

2026-03-01 T4 4.0 Mustang spec line cleanup

#39831 from David Mead · Rule change · TB 26-03 (2026-03 Fastrack)

neutralT4 Ford Mustang V6 (05-10) suspension and brake options simplified; fewer specific part numbers required.

In T4 Spec Lines, Ford Mustang V6 (05-10), change Notes as follows:
"~~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~~
~~are permitted to facilitate its installation. An Aluminum driveshaft is allowed. Any LSD permitted. Ford brake kit M-2300-D~~

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~~allowed. Aftermarket header allowed. 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. 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~~ Any springs
max F: 500 and R: 400 permitted, Any sway bar up to F: 35mm and R: 28mm permitted. 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. Any alternate metal driveshaft is
allowed. Ford brake kit M-2300-D allowed. 14” Brembo Brake Kit#M-2300-S permitted with OEM 355mm rotors
allowed. Aftermarket header allowed. Cold Air Intake allowed. S197 Mustang 8.8 or 7.5 rear axle allowed with any ratio. Spec
clutch #SF661 and flywheel #SF66A permitted."

Applies to Ford Mustang V6 on this page: Paolo Salvatore, Richard Grunenwald, Matthew Miller

2026-04-01 T4 16-24 ND MX5 T4

#39934 from Touring Committee · Rule change · TB 26-04 (2026-04 Fastrack)

fasterT4 Mazda MX-5 Miata 16-24 front sway bar increases from 29mm to 32mm.

In T4 Spec Lines, Mazda MX-5 Miata/ Club (16-18), change Notes as follows:
"~~29mm~~ 32mm(f) 16mm (r) sway bars allowed."
In T4 Spec Lines, Mazda MX5 Miata/Club/ RF (19-24), change Notes as follows:
"~~29mm~~ 32mm(f) 16mm (r) sway bars allowed."

Applies to Mazda MX-5 on this page: Michael Borden, Marc Cefalo, Steve Bertok, Steven Christopher

2026-05-01 T4 2003 Honda Civic Si Classification

#39999 from Milos Milivojevic · Rule change · TB 26-05 (2026-05 Fastrack)

neutralHonda Civic SI 02-03 classified in T4 at 1998cc, 2400 lbs minimum weight, 17x8 wheels, 225 max tires.

In T4 Spec Lines, classify Honda Civic SI (02-03) as follows:

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

2026-06-01 T4 SPB In T4

#39973 from Touring Committee · Rule change · TB 26-06 (2026-06 Fastrack)

neutralPorsche Spec Boxster in T4 made ineligible for Runoffs competition.

In T4 Spec Lines, Porsche Spec Boxster, add to Notes:
"Not eligible for Runoffs in T4."

2026-06-01 T4 02-06 Mini Cooper S

#40106 from Derrick Ambrose · Rule change · TB 26-06 (2026-06 Fastrack)

fasterT4 Mini Cooper S R53 minimum weight drops to 2650 lbs.

in T4 Spec Lines, Mini Cooper S R53 (02-06), change Min. Weight as follows:
"~~2700~~ 2650"

Applies to Mini Cooper S on this page: Trenton Kramer

2026-06-01 T4 02-06 Mini Cooper S Fuel

#40107 from Derrick Ambrose · Rule change · TB 26-06 (2026-06 Fastrack)

neutralT4 Mini Cooper S R53 02-06 now permits Bosch 0280158117 injectors.

In T4 Spec Lines, Mini Cooper S R53 (02-06), please add to Notes the following:
"Bosch 0280158117 Injectors permitted."

2026-06-01 T4 Shock error

#40176 from Touring Committee · Rule change · TB 26-06 (2026-06 Fastrack)

slowerT4 shock absorbers restricted to non-adjustable or single-adjustable only; remote reservoirs now prohibited.

In GCR, Section 4.1.4.2.D.5.b.2., change as follows:
"The make of shock absorber may be changed. Their number, perch location(s), system of attachment, and attachment points
shall not be altered. Their type (tube vs. lever, etc.) shall not be altered. The interchange of gas and hydraulic shock absorbers is
permitted.
T2-T3: Shocks must be installed in the original mounting locations unless noted in the spec line. Remote reservoirs and multiple
adjusters are permitted. Threaded shock bodies or adjusters may be used. Shocks can serve no purpose other than to damp
motion.
T4 only: Any non-adjustable or single adjustable (knob or screw) shock absorber is allowed. Shocks must be installed in the

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original mounting locations. Remote reservoirs are not permitted. Threaded shock bodies or adjusters may be used. Shocks can
serve no purpose other than to damp motion."

2026-06-01 T4 Max Tire Sizes

#40183 from Matthew Miller · Rule change · TB 26-06 (2026-06 Fastrack)

fasterT4 Ford Mustang V6 05-10 max tire size increases from 255 to 275.

In T4 Spec Lines, Ford Mustang V6 (05-10), change Max. Tire Size as follows:
"~~255~~ 275"

Applies to Ford Mustang V6 on this page: Paolo Salvatore, Richard Grunenwald, Matthew Miller

2026-07-01 T4 Dodge Neon DOHC Weight

#40329 from Stephen Hyatt · Rule change · TB 26-07 (2026-07 Fastrack)

slowerT4 Dodge Neon ACR DOHC weight increases to 2350 lbs, removing SOHC specification.

In T4 Spec Lines, Dodge/Plymouth Neon ACR SOHC/DOHC (2/4 door) (95-99), change weight as follows:
"~~SOHC:~~ 2350"

2026-08-01 T4 Is it time?

#40653 from Touring Committee · Rule change · TB 26-08 (2026-08 Fastrack)

neutralSpec Miata now classified in T4 with 15x7 wheels, 205 tires, and Spec Miata rules only; no other Touring allowances permitted.

In T4 Spec Lines, classify Spec Miata (SM) as follows:

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

2026-08-01 T4 Combine T4 BRZ/86/FRS generations

#40656 from Touring Committee · Rule change · TB 26-08 (2026-08 Fastrack)

neutralT4 BRZ and 86 generations combined; 2013-2016 models now allowed with current suspension and differential specs.

In T4 Spec Lines Subaru BRZ (17-21), change as follows:
Year: "(17 13-21)"
Notes: "Eibach 82105.320 sway bar kit allowed. Eibach 4.10582 springs or 225 lb (f) and 300 lb (r) springs allowed. SPC 67660
allowed. Front strut tower brace allowed. Raceseng, part # raceseng-ft86-r-shock-top permitted. Non-OEM limited slip
differential allowed with +50 lbs. weight penalty. Only 17” wheels permitted. 2013-2016 cars are permitted to fully update to
these specs."
In T4 Spec Lines, Toyota 86, GT (17-21), change as follows:
Model: "Toyota 86, GT (17-21) incl. Scion FRS (13-16)

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Notes: "Eibach 82105.320 sway bar kit allowed. Eibach 4.10582 springs or 225 lb (f) and 300 lb (r) springs allowed. SPC 67660
allowed. Front strut tower brace allowed. Raceseng, part # raceseng-ft86-r-shock-top permitted. Non-OEM limited slip
differential allowed with +50 lbs. weight penalty. Only 17” wheels permitted. 2013-2016 cars are permitted to fully update to
these specs."

Applies to Toyota 86 on this page: Chip Herr, John Heinricy

2026-09-01 T4 02-06 R53 Mini Cooper Hotchkins Rear Camber Arms

#40677 from Trenton Kramer · Rule change · TB 26-09 (2026-09 Fastrack)

neutralT4 Mini Cooper S R53 02-06 permits Hotchkis Rear Camber arms Part #13800.

In T4 Spec Lines, Mini Cooper S R53 (02-06), add to Notes the following:
"Hotchkis Rear Camber arms permitted Part #13800."

Applies to Mini Cooper S on this page: Trenton Kramer

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

T4 at Road America

Sectors

By car

Rule changes between these events

Runoffs 2020 → Runoffs 2024 2020-10-02 to 2024-10-01

2020-12-01 T4 Alfa Romeo 4C Launch Edition

2020-12-01 T4 Post Runoffs Feedback for T4

2021-01-01 T4 Request to Classify BMW M2 CS

2021-01-01 T4 Allow the SpecMX-5 Update Kit Into Touring 4 for the MX-5

2021-01-01 T4 Request Mustang 8.8ÃƒÂ¢Ã¢â€šÂ¬Ã‚Â rear axle replacement

2021-01-01 T4 Cap year range on all 86s

2021-02-01 T4 2021 Toyota Supra

2021-02-01 T4 06-15 MX-5 Durability

2021-02-01 T4 Request for Update to T4 Spec Line for Chevrolet Sonic (2011-)

2021-02-01 T4 NC MX-5 06-15 Part Number updates for 2021

2021-02-01 T4 BMW Z4 2.5L (03-05) Spec Line

2021-02-01 T4 Sway Bars for T4 2016+ MX5 Mazda

2021-02-01 T4 Change part numbers on BRZ, FRS lines in T4

2021-02-01 T4 T4 Mustang Axle Ratio and Wheels

2021-03-01 T4 E & O T4 Mustang Wheels

2021-04-01 T4 Request consistency review in GCR

2021-05-01 T4 Mini Cooper Spec Line Anomalies

2021-05-01 T4 Request CAI Mustang in T4

2021-06-01 T4 Civic Type R Brake Rotors

2021-07-01 T4 Wrong Part Number on 320i Spec Line

2021-11-01 T4 Request to Classify 2014 VW Jetta 1.8t TSI

2021-12-01 T4 Nissan Sentra SE-R Spec. V

2021-12-01 T4 Mazda RX-8 Spec Line Suspension Parts

2021-12-01 T4 Diverter Valve Plunger Upgrade

2021-12-01 T4 Adjust Honda FWD in T4 to encourage more Drivetrain Diversity

2021-12-01 T4 Touring 4 BOP adjustments for 2022

2022-01-01 T4 Reply to letter 29879 T2-T4 Grill Openings

2022-01-01 T4 Please Adjust 98-00 BMW 323 Min Weight to Reflect Current Class

2022-01-01 T4 Consolidate 12-13 and 14-15 Honda Civic Si spec lines for T4

2022-01-01 T4 Request to clarify radiator hoses

2022-01-01 T4 Clarify Permitted/Allowed

2022-01-01 T4 Correct RSX wording

2022-01-01 T4 Camaro

2022-02-01 T4 MX-5 Durability Detailed

2022-02-01 T4 Request Allowances for 2005 - 2010 Mustang

2022-03-01 T4 Reply to letter #31486/29879 T2-T4 Grill openings

2022-03-01 T4 BRZ vs BRZ TS

2022-04-01 T4 Request to Allow the Use of Aftermarket ECU's in Touring

2022-04-01 T4 Request JWT BSR Kit for 02-06 Nissan Sentra SE-R/Spec V

2022-04-01 T4 Please Confirm Touring 4 (98-00) BMW 323 is E46 generation

2022-04-01 T4 RX-8 Spring Part Numbers (E&O)

2022-04-01 T4 04-09 Mazda3 Tire Limit Clarification

2022-04-01 T4 Shock Part Number Errors & Omissions

2022-04-01 T4 Update Solo Spec Coupe to latest '20 specs for Road Racing

2022-04-01 T4 Request 2016 Mazda MX5 springs

2022-05-01 T4 Request to Add Spec Line for 2004-2009 Mazda3 i 2.0

2022-05-01 T4 Request Alternate Front & Rear Strut/Shock Top Hats

2022-06-01 T4 Request Wider Wheels for Hyundai Tiburon

2022-08-01 T4 04-09 Mazda3 Balance Shaft Delete Kit

2022-10-01 T4 Another 2022 BRZ/86 T3 request

2022-12-01 T4 T4 mustang

2022-12-01 T4 Mazda OEM LSD was letter 32655

2023-01-01 T4 Allowable Springs and Sway Bars for 06-11 Civic si Spec Line

2023-01-01 T4 Touring (T2-T5) Category

2023-01-01 T4 ENO 9.1.9.2.D.1.e.1.a.

2023-02-01 T4 2019-2021 Mazda MX5 ND2

2023-02-01 T4 Mustang OEM Grill Request

2023-02-01 T4 Mazda OEM LSD was letter 32655 typo

2023-03-01 T4 BMW 320I intercooler

2023-04-01 T4 Request to Classify 2004-2008 Acura TSX in T4

2023-04-01 T4 T4 Mustang Brakes/Swaybar

2023-06-01 T4 05-06 Mini Wheel Weight

2023-06-01 T4 06-09 VW Rabbit

2023-06-01 T4 96-01 Audi a4 2.8 Spring Rate

2023-07-01 T4 2002-2006 Mini Cooper S R53 Spec Line Request

2023-08-01 T4 Rules Clarification for Mazda RX8 Spec Line

2023-08-01 T4 rule book corrections

2023-08-01 T4 Ride Height Correction for the T3 Solstice.

2023-09-01 T4 Inclusion of similar car. (CLK 320)

2024-01-01 T4 Mazda MX-5 ND1 Spec Line Request

2024-01-01 T4 BRZ/FRS/86 Spring Allowance

2024-01-01 T4 TSX Allowance

2024-01-01 T4 Requested Update of Model Years of 370Z

2024-02-01 T4 More Car Lightening Stuff

2024-02-01 T4 ND Missed Items

2021-01-01 T4 Request Mustang 8.8ÃƒÂ¢Ã¢â€šÂ¬Ã‚Â rear axle replacement