BoP Lab / Hallett Motor Racing Circuit

SRF3 at Hallett Motor Racing Circuit

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): Craig Janssen in AVRG Green Country Grand Prix 2025 PM Test (1:15.482; the car's best in any other session was 1:25.599 and the rest of the class's best all week 1:17.807).

Pos	Car	Driver	Class	#	Lap	Theoretical	Qual	Race	5-lap stint	Consistency	Trap	S1	S2	S3
1	SCCA Ent SRF3	Craig Janssen	SRF3	181	1:16.675 C-Q	sector data unreliable	1:16.675 C-Q	1:24.086 A-R1	1:26.435 B-R2	+1.829 B-R2	104.4 C-Q	12.393	0.493	31.546
2	SCCA Ent SRF3	Tom Burt	SRF3	45, 95	1:17.807 B-P	sector data unreliable	1:22.566 A-Q1	1:23.104 A-R2	1:23.490 A-R2	+0.954 A-R2	112.4 B-P	13.689	0.553	30.574
3	SCCA Ent SRF3	Tyler Fox	SRF3	9	1:19.374 C-Q	sector data unreliable	1:19.374 C-Q	1:22.535 B-R2	1:22.732 B-R2	+1.071 B-R2	104.2 B-R1	12.932	0.499	31.045
4	SCCA Ent SRF3	Peyton Long	SRF3	52, 104	1:19.496 A-R2	sector data unreliable	1:19.968 A-Q1	1:19.496 A-R2	1:20.012 A-R2	+0.621 A-R2	105.4 A-R2	13.269	0.547	29.859
5	SCCA Ent SRF3	Tyler Stephens	SRF3	105	1:19.650 A-R2	sector data unreliable	1:19.723 A-Q1	1:19.650 A-R2	1:19.972 A-R2	+0.604 A-R2	105.6 A-Q2	13.350	0.544	29.982
6	SCCA Ent SRF3	Grant Heinig	SRF3	73, 127	1:20.348 A-R2	sector data unreliable	1:20.552 A-Q1	1:20.348 A-R2	1:20.616 A-R2	+0.599 A-R2	105.4 A-Q2, A-R2	13.464	0.548	30.381
7	SCCA Ent SRF3	Gary Glanger	SRF3	18, 11	1:20.377 A-R2	sector data unreliable	1:20.717 A-Q1	1:20.377 A-R2	1:20.615 A-R2	+0.586 A-R2	105.6 A-R1	13.415	0.547	30.367
8	SCCA Ent SRF3	Jim Cote Sr	SRF3	2	1:20.628 B-P	sector data unreliable	1:22.690 A-Q1	1:24.240 A-R2	1:26.368 B-R2	+2.600 B-R2	119.9 B-P	13.662	0.547	30.315
9	SCCA Ent SRF3	Carter Cote	SRF3	25	1:20.728 A-R2	sector data unreliable	1:21.381 A-Q1	1:20.728 A-R2	1:20.834 A-R2	+0.486 A-R2	104.8 A-R2	13.438	0.543	30.387
10	SCCA Ent SRF3	John Janssen	SRF3	4	1:21.036 A-R2	sector data unreliable	1:21.939 A-Q1	1:21.036 A-R2	1:21.211 A-R2	+0.600 A-R2	105.8 A-R2	13.487	0.545	30.626
11	SCCA Ent SRF3	Davis Henry	SRF3	114	1:21.040 A-R2	sector data unreliable	1:21.727 A-Q1	1:21.040 A-R2	1:21.262 A-R2	+0.894 A-R2	105.4 A-Q2	13.606	0.553	30.431
12	SCCA Ent SRF3	Jimmy Cote_Jr	SRF3	20	1:21.126 A-R2	sector data unreliable	1:21.747 A-Q1	1:21.126 A-R2	1:21.496 A-R2	+0.623 A-R2	105.0 A-R2	13.547	0.551	30.634
13	SCCA Ent SRF3	Rob Pielsticker	SRF3	33	1:21.247 A-R2	sector data unreliable	1:21.411 A-Q2	1:21.247 A-R2	1:21.659 A-R2	+0.763 A-R2	105.0 A-R2	13.653	0.547	30.660
14	SCCA Ent SRF3	Russell Oaks	SRF3	43	1:21.476 A-R2	sector data unreliable	1:21.724 A-Q1	1:21.476 A-R2	1:21.702 A-R2	+1.814 A-R2	104.6 A-Q2	13.542	0.547	30.474
15	SCCA Ent SRF3	Richard Stephens	SRF3	56, 156	1:21.511 C-Q	sector data unreliable	1:21.511 C-Q	1:21.802 B-R1	1:22.412 B-R1	+1.056 B-R1	105.2 C-Q	13.520	0.545	30.873
16	SCCA Ent SRF3	Stefan Schluter	SRF3	52	1:21.546 A-Q1	sector data unreliable	1:21.546 A-Q1	1:22.153 A-R2	4:19.069 A-R1	+2.685 A-R1	103.7 A-Q2	13.624	0.553	30.971
17	SCCA Ent SRF3	Nick Heinig	SRF3	73	1:21.579 A-R2	sector data unreliable	1:21.796 A-Q1	1:21.579 A-R2	1:21.955 A-R2	+1.194 A-R2	104.2 A-R2	13.656	0.548	30.824
18	SCCA Ent SRF3	Scott Monroe	SRF3	00	1:21.735 A-R2	sector data unreliable	1:22.236 A-Q1	1:21.735 A-R2	1:22.267 A-R2	+1.085 A-R2	104.8 A-R2	13.602	0.547	30.956
19	SCCA Ent SRF3	Thomas Schluter	SRF3	133	1:21.868 A-R2	sector data unreliable	1:22.746 A-Q1	1:21.868 A-R2	1:22.128 A-R2	+0.821 A-R2	102.7 A-R2	13.751	0.554	31.075
20	SCCA Ent SRF3	Ben Pigeon	SRF3	116	1:21.949 A-R2	sector data unreliable	1:22.269 A-Q1	1:21.949 A-R2	1:22.190 A-R2	+0.722 A-R2	104.8 C-Q, A-R2	13.457	0.547	30.860
21	SCCA Ent SRF3	Grayson Strathman	SRF3	111	1:22.048 B-R2	1:21.936	2:10.887 B-Q1	1:22.048 B-R2	1:22.362 B-R2	+1.895 B-R2	105.0 B-R2	14.087 B-R2	36.932 B-R2	30.917 B-R2
22	SCCA Ent SRF3	Sal Webber	SRF3	74	1:22.072 A-Q1	sector data unreliable	1:22.072 A-Q1	1:22.482 A-R2	1:23.977 B-R2	+1.196 B-R2	103.8 A-R1	13.605	0.554	31.247
23	SCCA Ent SRF3	Carl Hayward	SRF3	129	1:22.240 A-Q1	sector data unreliable	1:22.240 A-Q1	1:22.695 A-R2	1:24.873 B-R1	+1.470 B-R1	104.0 C-Q, A-R1	13.641	0.555	31.222
24	SCCA Ent SRF3	Paul Miranda	SRF3	44	1:22.271 A-R2	sector data unreliable	1:22.275 A-Q1	1:22.271 A-R2	1:22.575 A-R2	+0.962 A-R2	104.0 A-R1, A-R2	13.563	0.550	31.108
25	SCCA Ent SRF3	Corey Rueth	SRF3	52	1:22.325 B-P	1:22.325					102.2 B-P	14.268 B-P	37.194 B-P	31.133 B-P
26	SCCA Ent SRF3	Matt Strathman	SRF3	118	1:22.360 A-Q1	sector data unreliable	1:22.360 A-Q1	1:22.509 A-R2	1:26.258 B-R1	+0.993 B-R1	104.0 C-Q	13.513	0.548	31.160
27	SCCA Ent SRF3	Carter Kunkel	SRF3	133	1:22.423 B-R1	1:22.157	1:34.406 B-Q1	1:22.423 B-R1	1:22.580 B-R2	+1.127 B-R2	104.0 B-R1, B-R2	14.179 B-R2	36.960 B-R2	31.018 B-R1
28	SCCA Ent SRF3	Robin Kirkland	SRF3	14	1:22.435 A-Q1	sector data unreliable	1:22.435 A-Q1	1:22.809 A-R2	1:23.331 A-R2	+1.028 A-R2	103.7 A-Q2	13.694	0.552	31.505
29	SCCA Ent SRF3	Brent Steward	SRF3	67	1:22.580 A-R2	sector data unreliable	1:22.974 A-Q1	1:22.580 A-R2	1:22.723 A-R2	+2.194 A-R2	102.7 A-R2	13.729	0.557	31.130
30	SCCA Ent SRF3	Michael Siemer	SRF3	88	1:22.702 A-Q1	sector data unreliable	1:22.702 A-Q1	1:24.455 B-R2	1:24.999 B-R2	+2.057 B-R2	102.5 B-R1	13.795	0.556	31.599
31	SCCA Ent SRF3	Joseph Maley	SRF3	199	1:22.705 B-R2	sector data unreliable	1:24.186 C-Q	1:22.705 B-R2	1:23.293 B-R2	+1.940 B-R2	105.2 C-Q	14.111	0.557	31.135
32	SCCA Ent SRF3	Grant Vogel	SRF3	46	1:22.873 C-Q	sector data unreliable	1:22.873 C-Q				104.4 C-Q	13.866	0.549	31.101
33	SCCA Ent SRF3	Charles Pigeon	SRF3	171	1:22.885 A-Q1	sector data unreliable	1:22.885 A-Q1	1:23.175 A-R2	1:23.419 A-R2	+0.793 A-R2	104.0 C-Q	13.732	0.552	31.249
34	SCCA Ent SRF3	Thomas Davis	SRF3	17	1:22.987 B-R1	1:22.768	1:39.636 B-Q1	1:22.987 B-R1	1:23.919 B-R2	+1.896 B-R2	103.1 B-R2	14.340 B-R2	37.183 B-R1	31.245 B-R1
35	SCCA Ent SRF3	Timothy Blakeley	SRF3	26	1:23.004 A-Q1	sector data unreliable	1:23.004 A-Q1	1:23.091 A-R2	1:23.240 A-R2	+0.533 A-R2	104.8 A-R2	13.679	0.551	31.540
36	SCCA Ent SRF3	Mark Hutchins	SRF3	195	1:23.061 A-R2	sector data unreliable	1:23.590 A-Q1	1:23.061 A-R2	1:23.944 A-R2	+1.682 A-R2	104.0 A-R2	13.826	0.554	31.351
37	SCCA Ent SRF3	Jon Mcclintock	SRF3	23	1:23.081 B-R2	1:22.971	1:35.154 B-Q1	1:23.081 B-R2	1:23.564 B-R2	+0.989 B-R2	103.3 B-R1, B-R2	14.270 B-R1	37.421 B-R2	31.280 B-R2
38	SCCA Ent SRF3	R Mark Carter	SRF3	18	1:23.085 A-R2	sector data unreliable	1:24.111 A-Q2	1:23.085 A-R2	1:23.692 A-R2	+1.871 A-R2	103.3 A-R1, A-R2	14.096	0.562	31.227
39	SCCA Ent SRF3	Ej Abed	SRF3	27	1:23.306 B-R2	1:23.166	1:32.356 B-Q1	1:23.306 B-R2	1:24.130 B-R2	+1.647 B-R2	103.3 B-R2	14.383 B-R2	37.493 B-P	31.290 B-R2
40	SCCA Ent SRF3	Chris Funk	SRF3	54	1:23.351 C-Q	sector data unreliable	1:23.351 C-Q				105.0 C-Q	13.799	0.551	31.525
41	SCCA Ent SRF3	Joshua Justice	SRF3	99	1:23.578 B-R2	1:22.828	1:30.113 B-Q1	1:23.578 B-R2	1:23.930 B-R2	+1.151 B-R2	105.0 B-R2	14.153 B-R2	37.410 B-R2	31.265 B-R2
42	SCCA Ent SRF3	Nils Musaeus	SRF3	136, 36	1:23.579 B-R2	sector data unreliable	1:23.878 C-Q	1:23.579 B-R2	1:24.195 B-R2	+1.413 B-R2	103.3 B-R1	13.922	0.553	31.406
43	SCCA Ent SRF3	Ben Jacobs	SRF3	171	1:23.754 B-R2	1:23.312	1:36.002 B-Q1	1:23.754 B-R2	1:24.050 B-R2	+0.742 B-R2	103.7 B-R1	14.375 B-R2	37.626 B-R2	31.311 B-R2
44	SCCA Ent SRF3	Brad Gorrondona	SRF3	40	1:23.819 B-R2	1:23.526	1:28.985 B-Q1	1:23.819 B-R2	1:24.256 B-R2	+0.919 B-R2	102.7 B-R2	14.230 B-R2	37.732 B-R2	31.564 B-R2
45	SCCA Ent SRF3	John Vogel	SRF3	47	1:23.938 C-Q	sector data unreliable	1:23.938 C-Q				104.4 C-Q	14.237	0.564	31.580
46	SCCA Ent SRF3	Kelly Toombs	SRF3	36	1:24.136 C-Q	sector data unreliable	1:24.136 C-Q				104.6 C-Q	14.032	0.548	31.871
47	SCCA Ent SRF3	Ted Smith	SRF3	26	1:24.305 B-R1	1:23.792	1:28.974 B-Q1	1:24.305 B-R1	1:26.074 B-R1	+2.339 B-R1	102.7 B-P	14.394 B-P	37.684 B-R1	31.714 B-R1
48	SCCA Ent SRF3	Ashley B Oaks	SRF3	104	1:24.376 B-R1	sector data unreliable	1:27.440 C-Q	1:24.376 B-R1	1:25.820 B-R1	+1.935 B-R1	103.8 B-R1, B-R2	14.430	0.564	31.640
49	SCCA Ent SRF3	Dwight Rider	SRF3	65	1:24.549 A-Q1	sector data unreliable	1:24.549 A-Q1	1:28.403 A-R1	4:21.436 A-R1	+6.587 A-R1	100.6 A-R1	14.312	0.560	32.471
50	SCCA Ent SRF3	Jeff Bedell	SRF3	16	1:24.584 A-Q1	sector data unreliable	1:24.584 A-Q1	1:25.121 B-R2	1:26.707 B-R2	+1.951 B-R2	102.2 B-R1	14.305	0.589	31.770
51	SCCA Ent SRF3	Frederick Haas	SRF3	158	1:24.870 A-R2	sector data unreliable	1:25.314 A-Q1	1:24.870 A-R2	1:25.799 A-R2	+1.568 A-R2	103.3 A-R1	14.083	0.557	32.199
52	SCCA Ent SRF3	Raymond Miller	SRF3	09	1:24.985 C-Q	sector data unreliable	1:24.985 C-Q				102.7 C-Q	14.297	0.560	31.981
53	SCCA Ent SRF3	David Roth	SRF3	7	1:25.549 A-R2	sector data unreliable	1:26.251 A-Q2	1:25.549 A-R2	1:26.304 A-R2	+2.150 A-R2	102.5 A-Q2	14.281	0.562	32.497
54	SCCA Ent SRF3	Kirk Collier	SRF3	146	1:26.293 B-R2	sector data unreliable	1:26.356 C-Q	1:26.293 B-R2	1:26.508 B-R2	+0.424 B-R2	102.5 C-Q	14.248	0.569	32.354
55	SCCA Ent SRF3	John Unangst	SRF3	135	1:26.473 C-Q	sector data unreliable	1:26.473 C-Q				103.3 C-Q	14.699	0.569	32.948
56	SCCA Ent SRF3	Matthew Shaffer >115%	SRF3	11	1:28.719 C-Q	sector data unreliable	1:28.719 C-Q				98.6 C-Q	15.207	0.576	33.448

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 → IM2
S2 IM2 → IM3
S3 IM3 → SF
SPd IM1 → IM2 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.

Rule changes between these events

AVRG Green Country Grand Prix 2024 → AVRG Green Country Grand Prix 2025 2024-04-20 to 2025-04-26

2024-06-01 SRF3 SRF3 Alternator Pulley Update In

#36095 from Robey Clark · Rule change · TB 24-06 (2024-06 Fastrack)

fasterSRF3 alternator pulley minimum weight reduced from 12 oz to 11 oz.

SFR3, GCR section 9.1.8.D.2.H.17, change as follows:
"Alternator Pulley: P/N G902130, or P/N G902130A, or P/N G902131 (six row). 12 11 oz minimum weight."

2024-08-01 SRF3 Update Rain Tire Rule and Hoosier Decal Placement

#36436 from Robey Clark · Rule change · TB 24-08 (2024-08 Fastrack)

slowerSRF wet tires: P185/60R13 H20/W2 option removed; P185/65R13 W2 front now required with P205/60R13 W2 rear.

In SRF, GCR section 9.1.8.D.1.X.f, change as follows:
"Wet:
~~Front – Hoosier P/N 46100 P185/60R13 H20 or W2~~
~~Rear – Hoosier P/N 46105 P205/60R13 H20 or W2~~
~~Ground clearance is 2.5” with driver as raced when P185/60R13 (H20 or W2) tires are used.~~
OR
Front – Hoosier P/N 46101 P185/65R13 W2
Rear – Hoosier P/N 46105 P205/60R13 W2

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1. It is forbidden to regroove tires.
2. The use of tire warmers or cooling methods other than natural air convection or conduction is prohibited. The penalty for
violation will be the loss of qualifying times and/or the disqualification of race results.
3. Hoosier SRF/SRF3 Decal Placement:
Four (4) "Hoosier" decals are required in the following locations: Two (2) 11" X 3" decals on the vertical plane of the front nose to
the outside of the cooling opening on each side and two (2) 18" X 5" decals, one on each side of the engine cover or above the
rear wheel openings on the vertical plane. Hoosier decals are available, free of charge, from all Hoosier tire distributors including
SCCA Enterprises."

2024-09-01 SRF3 Update to Letter 36619 with new Hoosier Contingency Decal Info

#36624 from Robey Clark · Rule change · TB 24-09 (2024-09 Fastrack)

neutralSRF Hoosier decal requirement reduced from four decals in specific locations to three decals with simpler placement rules.

In SRF, GCR section 9.1.8.D.1.X.f.3, change as follows:
"~~Four (4) "Hoosier" decals are required in the following locations: Two (2) 11" X 3" decals on the vertical plane of the front nose~~
~~to the outside of the cooling opening on each side and two (2) 18" X 5" decals, one on each side of the engine cover or above the~~
~~rear wheel openings on the vertical plane. Hoosier decals are available, free of charge, from all Hoosier tire distributors including~~
~~SCCA Enterprises~~ Per Hoosier's contingency program, three (3) decals are required to qualify for contingency awards. One (1)
decal must be located on each side of the car and one (1) decal must be visible on the front."

2024-10-01 SRF3 Update SRF3 Air Filter Rule

#36681 from Robey Clark · Rule change · TB 24-10 (2024-10 Fastrack)

unclearSRF3 air filter rule removes K&N RC-9160 option, leaving only P/N WM301020 allowed.

In SRF, GCR section 9.1.8.D.2.H.23, change as follows:
"Air Filter: P/N WM301020 ~~or K&N RC-9160~~"

2024-10-01 SRF3 Update SRF Brake Rotor Thickness

#36687 from Robey Clark · Rule change · TB 24-10 (2024-10 Fastrack)

slowerSRF brake rotor minimum thickness increases from 12.20mm to 13.25mm, Wilwood vented rotor P/N 800065.

In SRF, GCR section 9.1.8.D.1.X.g, change as follows:
"Brakes: Hawk Blue 9012 pads P/N 801993 must be used. Wilwood vented rotor P/N 800065 ~~shall~~ must be used as delivered with
no machining of any kind. Minimum thickness ~~12.20mm (0.481”)~~ 13.25mm (0.522”)."

2024-10-01 SRF3 Hoosier Tire Decal Placement

#36739 from Robey Clark · Rule change · TB 24-10 (2024-10 Fastrack)

neutralSRF3 Hoosier logo placement changes from four decals to three decals in different locations.

In SRF, GCR section 9.1.8.D.2.B, change as follows:
"Mandatory identification: "SRF3" near the side car numbers. "~~Hoosier" logo (4) on both sides front lower outer corners of the~~
~~nose and each side of the tail.~~ Three (3) "Hoosier" logos, one (1) on each side of the car and one (1) on the center front of the car."

2025-04-01 SRF3 Driver Safety & Comfort

#37966 from Robey Clark · Rule change · TB 25-04 (2025-04 Fastrack)

neutralSRF drivers with disabilities may modify seat and controls for safety and comfort with approval and logbook notation.

In SRF, GCR section 9.1.8.D.1.D, add the following:
"f. Driver Safety and Comfort modifications to seat and controls for drivers with disabilities may be made only by approval. These
modifications must be reported to SCCA Enterprises and noted in the car logbook. The modifications are approved only for the
noted driver with disabilities. If the car is used by or sold to another driver, it must be returned to the previous standard
configuration."

2025-04-01 SRF3 Update SADEV transmission specs

#37992 from Club Racing Board · Rule change · TB 25-04 (2025-04 Fastrack)

neutralSRF SADEV-SRF3 6-speed sequential transmission gear ratios wording clarified, effective 2025-04-01.

In SRF, GCR section 9.1.8.D.2.K, change as follows:
"OR
SADEV-SRF3 6-Speed Sequential ~~(beginning~~ from Oct. 4, 2021 onward):
1st 12-36 3.0000 : 1
2nd 15-31 2.0667 : 1
3rd 18-28 1.5556 : 1
4th 22-28 1.2727 : 1
5th 24-26 1.0833 : 1

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6th 25-23 0.9200 : 1
Final Drive Ratio: 15-48 3.20"

AVRG Green Country Grand Prix 2025 → AVRG Green Country Grand Prix 2026 2025-04-26 to 2026-04-25

2025-09-01 SRF3 SRF Rule Updates

#38853 from Robey Clark · Rule change · TB 25-09 (2025-09 Fastrack)

neutralSRF3 brakes restructured: Hawk Blue 801993 pads, Wilwood 800065 rotors only; adds Girling 880358, Wilwood 880357, Tilton 880360 master cylinders.

Effective 9/1/25 in SRF, GCR section 9.1.8.D.1.V.ff, add the following:
"SRF3 Oil Cooler, P/N G480503 may be used as mounted per the GEN3 Assembly Manual. No fan permitted for SRF. HD Oil
Cooler kit P/N G1148500 may be used as mounted per the GEN3 Conversion Manual."
Effective 9/1/25 in SRF, GCR section 9.1.8.D.X.g, change as follows:
"Brakes: ~~Hawk Blue 9012 pads P/N 801993 must be used. Wilwood vented rotor P/N 800065 must be used as delivered with no~~
~~machining of any kind. Minimum thickness 13.25mm (0.522”). The Renault Alliance solid front rotors may not be used. Rubber~~
~~caliper bushings may be replaced with bronze bushings P/N 1196185 or P/N 1196185. Original caliper pistons may be replaced~~
~~with vented caliper piston P/N 1196184; no other modification allowed. Wilwood caliper with bracket universal fit P/N 800038~~

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~~may be used as delivered with no modification of any kind. Wilwood knock back spring (2.63 lbs.) P/N 800045 may be used as~~
~~delivered with no modification of any kind; maximum of one spring per caliper.~~
1. Hawk Blue pads P/N 801993 only
2. Wilwood Vented Rotor P/N 800065 only, as delivered, with no machining of any kind. Minimum thickness 13.25mm (0.522")
3. Wilwood universal caliper Kit P/N 1180008 as delivered, caliper only P/N 800038; Wilwood knock back spring P/N 800045
may be used as delivered, with no machining of any kind, and only one spring per caliper
4. Renault caliper rubber bushings may be replaced with bronze bushings P/N 1196185 or P/N 1196185A
5. Renault caliper piston may be replaced with P/N 1196184 vented piston as delivered, with no machining of any kind
6. Girling .750" Master Cylinder P/N 880358 as delivered, with no machining of any kind
7. Wilwood .750" Master Cylinder P/N 880357 as delivered, with no machining of any kind
8. Tilton .750" Master Cylinder P/N 880360 as delivered, with no machining of any kind"

2025-10-01 SRF3 Add HD Oil Cooler

#38979 from Robey Clark · Rule change · TB 25-10 (2025-10 Fastrack)

neutralSRF3 adds HD Oil Cooler P/N G1148500 as alternative to standard cooler P/N G480503.

In SRF, GCR section 9.1.8.D.1.V.ff, change as follows:
"SRF3 Oil Cooler, P/N G480503 or HD Oil Cooler P/N G1148500 may be used as mounted per the GEN3 Assembly Manual. No fan
permitted for SRF. ~~HD Oil Cooler kit P/N G1148500 may be used as mounted per the GEN3 Conversion Manual.~~"

2026-03-01 SRF3 SRF3 Spark Plugs

#39899 from Robey Clark · Rule change · TB 26-03 (2026-03 Fastrack)

neutralSRF3 spark plugs restricted to NGK LTR7IX-11 P/N G301041 only, washers and sealing rings prohibited.

In SRF, GCR section 9.1.8.D.2.H.18, add the following:
"Spark Plugs: P/N G301041 ONLY NGK LTR7IX-11 / Washers or sealing rings are not allowed for any purpose."

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