BoP Lab / Michelin Raceway Road Atlanta
| Pos | Car | Driver | Class | # | Lap | Theoretical | Qual | Race | 5-lap stint | Consistency | Trap | S1 | S2 | S3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Mazda RX-8 | Marc Cefalo | T4 | 00 | 1:39.654 B-R2 | 1:39.420 | 1:40.096 B-Q2 | 1:39.654 B-R2 | 1:40.184 B-R2 | +0.831 B-R2 | 111.1 B-R2 | 37.643 B-R2 | 36.384 B-R2 | 25.393 B-R2 |
| 2 | Mazda Miata | Ethan Barker | T4 | 112 | 1:39.976 B-Q2 | 1:39.456 | 1:39.976 B-Q2 | 1:40.155 B-R2 | 1:40.753 B-R2 | +0.624 B-R2 | 108.6 B-R2 | 37.465 B-R2 | 36.492 B-R2 | 25.499 B-Q2 |
| 3 | Mazda MX-5 | Kevin Fryer | T4 | 98 | 1:40.673 A-Q2 | 1:40.576 | 1:40.673 A-Q2 | 1:41.326 A-R1 | 1:41.540 A-R1 | +1.666 A-R1 | 119.5 A-R1 | 38.159 A-Q2 | 36.623 A-Q2 | 25.794 A-Q2 |
| 4 | Mazda Miata | Ayden Rose | T4 | 46 | 1:40.736 A-R1 | 1:40.386 | 1:41.779 A-Q2 | 1:40.736 A-R1 | 1:41.425 A-R1 | +4.923 A-R1 | 116.5 A-R1 | 38.264 A-R1 | 36.631 A-R1 | 25.491 A-R1 |
| 5 | Ford Mustang | Scotty B White | T4 | 0 | 1:41.239 B-R2 | sector data unreliable | 1:41.847 B-Q2 | 1:41.239 B-R2 | 1:41.926 B-R2 | +0.964 B-R2 | 113.1 B-P | 38.735 | 0.916 | 25.791 |
| 6 | Mazda MX-5 | Robert Spence | T4 | 59 | 1:41.816 B-Q2 | sector data unreliable | 1:41.816 B-Q2 | 1:42.345 B-R1 | 1:42.920 B-R2 | +0.979 B-R2 | 117.1 A-Q1 | 38.720 | 0.759 | 25.819 |
| 7 | Toyota GR86 | Angelica Sprehe | T4 | 120 | 1:42.072 A-R1 | 1:41.788 | 1:42.755 A-Q1 | 1:42.072 A-R1 | 1:43.692 A-R1 | +4.048 A-R1 | 121.0 A-Q1 | 39.312 A-P | 36.497 A-R1 | 25.979 A-R1 |
| 8 | Mazda 3S | Leann Falk | T4 | 29 | 1:47.885 A-Q1 | 1:47.593 | 1:47.885 A-Q1 | 1:49.327 A-R1 | 1:52.043 A-R1 | +11.758 A-R1 | 110.9 A-Q1 | 41.580 A-Q1 | 38.358 A-Q1 | 27.655 A-Q1 |
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 are numbered in lap order from start/finish, whatever each event's timing called them; the loop names are SCCA timing's.
| Car | Class | Drivers | Lap | Qual | Race | Trap | S1 | S2 | S3 |
|---|---|---|---|---|---|---|---|---|---|
| Mazda RX-8 | T4 | 1 | 1:39.654Marc Cefalo | 1:40.096Marc Cefalo | 1:39.654Marc Cefalo | 111.1Marc Cefalo | 37.643Marc Cefalo | 36.384Marc Cefalo | 25.393Marc Cefalo |
| Mazda Miata | T4 | 2 | 1:39.976Ethan Barker | 1:39.976Ethan Barker | 1:40.155Ethan Barker | 116.5Ayden Rose | 37.465Ethan Barker | 36.492Ethan Barker | 25.491Ayden Rose |
| Mazda MX-5 | T4 | 2 | 1:40.673Kevin Fryer | 1:40.673Kevin Fryer | 1:41.326Kevin Fryer | 119.5Kevin Fryer | 38.159Kevin Fryer | 0.759Robert Spence | 25.794Kevin Fryer |
| Ford Mustang | T4 | 1 | 1:41.239Scotty B White | 1:41.847Scotty B White | 1:41.239Scotty B White | 113.1Scotty B White | 38.735Scotty B White | 0.916Scotty B White | 25.791Scotty B White |
| Toyota GR86 | T4 | 1 | 1:42.072Angelica Sprehe | 1:42.755Angelica Sprehe | 1:42.072Angelica Sprehe | 121.0Angelica Sprehe | 39.312Angelica Sprehe | 36.497Angelica Sprehe | 25.979Angelica Sprehe |
| Mazda 3S | T4 | 1 | 1:47.885Leann Falk | 1:47.885Leann Falk | 1:49.327Leann Falk | 110.9Leann Falk | 41.580Leann Falk | 38.358Leann Falk | 27.655Leann Falk |
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.
#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 on this page: Scotty B White
#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 on this page: Scotty B White
#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 on this page: Scotty B White
#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."
#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."
#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"
#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"
#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.
#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.
#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 Miata on this page: Ethan Barker, Ayden Rose
Applies to Mazda MX-5 on this page: Kevin Fryer, Robert Spence
#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 Miata on this page: Ethan Barker, Ayden Rose
Applies to Mazda MX-5 on this page: Kevin Fryer, Robert Spence
#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
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 Miata on this page: Ethan Barker, Ayden Rose
Applies to Mazda MX-5 on this page: Kevin Fryer, Robert Spence
#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:
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 Ford Mustang on this page: Scotty B White
Applies to Mazda MX-5 on this page: Kevin Fryer, Robert Spence
#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.
#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."
#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."
#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.
#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
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 on this page: Scotty B White
#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
bushings. Adjustable toe links with spherical bearings are permitted and may serve no purpose other than adjusting toeangle. 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."
#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 withthe following parts- (0000-02- 5803-02, 0000-02-5803-01, 0000-02-5804-02, 0000-02-5804-01). Suspension package permittedwith a 100 lbs. weight increase that includes the following parts: front springs #0000-04-9700-08, s 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. 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 optionpermitted but must be disabled from moving action and positively fastened. Any OEM or aftermarket hardtop is permitted thatretains the OEM roof silhouette, including Mazda hardtop part #0000-07-5902-ND 29mm (f) 16mm (r) sway bars allowed. Up to500lb 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 Miata on this page: Ethan Barker, Ayden Rose
Applies to Mazda MX-5 on this page: Kevin Fryer, Robert Spence
#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 kitincludes: Dampers M-18000-A, Lowering Springs M-5300-N, Sway Bars M- 5490-C, Strut Tower Brace M-20201-F. FordPositraction 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 panhard bar permitted must be set at same length as a stock bar, center mounting hole to center mounting hole +/- 0.25 inch. Analternative steel drive shaft is permitted; this drive shaft is otherwise unrestricted, but no modifications to other componentsare 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 final drive ratio allowed. 7.5 rear axleassembly 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 on this page: Scotty B White
What the rules allowed changed as listed; this does not say what any particular car ran.