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; 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 ">" (with ">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
Best lap
Best qual
Best race
Best trap
Best S1
Best S2
Best S3
Best S4
Ford Mustang V6
T4
3
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
Mazda RX-8
T4
10
2:35.757Matt Spicuzzi
2:35.831Ethan Barker
2:35.757Matt Spicuzzi
128.4Marc Cefalo
44.610Marc Cefalo
59.145Ethan Barker
29.949Matt Spicuzzi
21.044Alex Lozano
Mazda RX-8 (2009)
T4
2
2:35.757Matt Spicuzzi
2:35.876Matt Spicuzzi
2:35.757Matt Spicuzzi
127.6Matt Spicuzzi
44.643Matt Spicuzzi
59.433Matt Spicuzzi
29.949Matt Spicuzzi
21.044Alex Lozano
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 (2004)
T4
3
2:36.759Marc Cefalo
2:36.759Marc Cefalo
2:36.912Marc Cefalo
128.4Marc Cefalo
44.610Marc Cefalo
59.414Marc Cefalo
30.211Marc Cefalo
21.417Marc Cefalo
Mazda RX-8
T4
3
2:38.733Jim Ebben
2:38.733Jim Ebben
2:39.411Stephen Blethen
125.1Richard Dickey
45.877Stephen Blethen
1:00.449Stephen Blethen
30.926Jim Ebben
21.619Stephen Blethen
Mazda MX-5
T4
8
2:37.203Kevin Fryer
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 (2006)
T4
3
2:37.203Kevin Fryer
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
3
2:39.150Ethan Barker
2:39.150Ethan Barker
124.0Blake Thompson
45.971Ethan Barker
59.916Ethan Barker
30.663Blake Thompson
21.856James Ebben
Mazda MX-5 (2009)
T4
1
2:39.535RIchard Mooney
2:39.535RIchard Mooney
2:39.606RIchard Mooney
124.0RIchard Mooney
46.197RIchard Mooney
59.936RIchard Mooney
30.705RIchard 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
Toyota 86
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
BMW Z4
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
Mazda 3 S
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
BMW Z4/E89/2.5L
T4
2
2:39.037Mario Carini
2:39.037Mario Carini
2:39.076Mario Carini
126.8Mario Carini
45.767Mario Carini
1:00.787Mario Carini
30.715Mario Carini
21.415Mario Carini
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
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
June Sprints 2025 → Runoffs 2025 2025-06-06 to 2025-09-29
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."
T4 Incorrect Touring Heading
#38451 from Terry Hanushek · Rule change · TB 25-08 (2025-08 Fastrack)
In T2-T4 Spec Lines, change Table Header as follows: "T2 ET"
Runoffs 2025 → June Sprints 2026 2025-09-29 to 2026-06-05
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
T4 Reinstatement of the 2005-2010 Cobalt into T4
#38987 from Tim Little · Rule change · TB 25-11 (2025-11 Fastrack)
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.
T4 Request to Classify Mercedes C230K
#39080 from Patrick Morgan · Rule change · TB 25-11 (2025-11 Fastrack)
In T4 Spec Lines, classify Mercedes C230 Kompressor (2002-2005) as follows:
A specification table follows in the original; it is not shown here.
T4 ND Gearset Request for T4
#39166 from Josh Smith · Rule change · TB 25-11 (2025-11 Fastrack)
In T4 Spec Lines, Mazda MX5 Miata/Club/ RF (19-24), add to Notes the following: "Gear kit Kit PT#- 0000-02-6100." In T4 Spec Lines, Mazda MX-5 Miata/Club (16-18), add to Notes the following: "Gear kit Kit PT#- 0000-02-6100." In T3 Spec Lines, Mazda MX-5 Miata (16-18), add to Notes the following: "Gear kit Kit PT#- 0000-02-6100." In T3 Spec Lines, Mazda MX-5 Global Cup Miata (2016-2021) ND1, ND, add to Notes the following: "Gear kit Kit PT#- 0000-02-6100."
Applies to Mazda MX-5 on this page: Ethan Barker, James Ebben, Blake Thompson
T4 E&O wheel size on ND
#39168 from Josh Smith · Rule change · TB 25-11 (2025-11 Fastrack)
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: Ethan Barker, James Ebben, Blake Thompson
T4 ND Spec Lines Wrong PT#'s
#39170 from Josh Smith · Rule change · TB 25-11 (2025-11 Fastrack)
In T4 Spec Lines, Mazda MX5 Miata/Club/ RF (19-24), change Notes as follows: "Factory bolt-in roll bar/ cross member may be removed to facilitate roll cage installation. The following item(s) must remain stock: transmission differential unless specified below. Retractable hardtop option permitted but must be disabled from moving action and positively fastened. Any OEM or aftermarket hardtop is permitted that retains the OEM roof silhouette, including Mazda hardtop part #0000-07-5902-ND and part #0000-07-5901 (discontinued DG Motorsports). 29mm (f) 16mm (r) sway bars allowed. 3rd and 4th gear may be replaced with the following parts- (0000-02-5803-02, 0000-02-5803-01, 0000-02-5804-02, 0000-02-5804-01). Suspension package permitted with a 100 lbs. weight increase that includes the following parts: front springs #0000-04-9700-08, springs up to 500lb front and 300lb rear allowed. Mazda tower brace 0000-04-5626 allowed. Mazda header
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: Ethan Barker, James Ebben, Blake Thompson
T4 Touring 4 Post-Runoffs BOP Adjustments and Changes
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
Applies to Ford Mustang V6 on this page: Alex Lozano, Matt Spicuzzi, Scotty B White
Applies to Mazda MX-5 on this page: Kevin Fryer, Madin Workman, Connor Thomas, Ethan Barker, James Ebben, Blake Thompson, RIchard Mooney, Brad Childs
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."
T4 Clarify T4 Brake Rotor Allowance
#39503 from David Mead · Rule change · TB 26-01 (2026-01 Fastrack)
In GCR, Section 9.1.9.2.D.6.a.6., change as follows: "In T2-Performance alternative rotors, including 2 piece rotors are permitted. Rotors must be within 5% of OE diameter or a maximum diameter of 360mm. In T3- Performance alternative rotors, including 2 piece rotors are permitted with a maximum diameter of 360mm. T4- Performance alternative 1-piece rotors are permitted but rotors must meet the sizes listed in the spec line. Spec lines showing alternate brake kits are also permitted to use 1-piece performance alternative rotors of the same size."
T4 T4 and T3 Feedback
#39230 from Tim Myers · Rule change · TB 26-02 (2026-02 Fastrack)
In T4 Spec Lines, remove Ford Mustang V6 (05-14) in its entirety.
T4 T4 Mustang 4.0
#39489 from Scotty B White · Rule change · TB 26-02 (2026-02 Fastrack)
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
Show 4 more lines
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."
T4 Allow Alt Bushing Material in Toe Links
#39607 from David Mead · Rule change · TB 26-02 (2026-02 Fastrack)
In GCR, Section 9.1.9.D.5.a.1., change as follows: "T2-T4: A maximum of 3.5 degrees of negative camber is allowed on front and rear suspensions. Spec line part(s) may not be modified to increase caster and camber. Strut suspensions may adjust camber and caster by the use of eccentric bushings, eccentric bolts (crash bolts) at the strut-to-spindle, and/or by use of slotted adjustment plates at the top of the strut mounting plate. If upper strut slotted adjustment plates are used, they shall be located on existing chassis structure, utilizing the unmodified manufacturer’s original bolt holes and may not serve as reinforcement for that structure. Slotted adjustment plates (strut camber plates) may incorporate a single spherical bearing (spherical bushing) and a ball thrust bearing per strut tower. On other forms of suspension, camber and caster adjustment may be achieved by the use of shims and/or eccentric
Show 4 more lines
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."
T4 ND MX-5 Spec Line Rewrite Request
#39802 from Josh Smith · Rule change · TB 26-03 (2026-03 Fastrack)
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
Show 19 more lines
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: Ethan Barker, James Ebben, Blake Thompson
T4 4.0 Mustang spec line cleanup
#39831 from David Mead · Rule change · TB 26-03 (2026-03 Fastrack)
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
Show 8 more lines
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."
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
Show 2 more lines
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."
T4 Max Tire Sizes
#40183 from Matthew Miller · Rule change · TB 26-06 (2026-06 Fastrack)
In T4 Spec Lines, Ford Mustang V6 (05-10), change Max. Tire Size as follows: "255 275"
June Sprints 2026 → Runoffs 2026 2026-06-05 to 2026-09-28
T4 Dodge Neon DOHC Weight
#40329 from Stephen Hyatt · Rule change · TB 26-07 (2026-07 Fastrack)
In T4 Spec Lines, Dodge/Plymouth Neon ACR SOHC/DOHC (2/4 door) (95-99), change weight as follows: "SOHC: 2350"