T1 Class 2015+ Mustang GT350(R)
#21466 from Scotty B White · Rule change · TB 19-01 (2019-01 Fastrack)
In T1-LP, Mustang GT350 (2015-), replace spec line as follows:
A specification table follows in the original; it is not shown here.
BoP Lab / Mid-Ohio Sports Car Course
This track has been raced on 2 configurations (Scoring Sidebar, 2.40 mi; 16 Runoffs Scoring Sidebar, 2.26 mi). Laps on different configurations are not comparable, so only events on the 2.40 mile layout are shown; switch above to see the others.
| Pos | Car | Driver | Class | # | Best lap | Best theoretical lap | Best qual lap | Best race lap | Best trap speed | Best S1 | Best S2 | Best S3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | BMW M3 | Brian Goodman | T1 | 48 | 1:33.603 A-Q2 | 1:33.294 | 1:33.603 A-Q2 | 1:34.796 A-R2 | 137.0 A-Q1, A-Q2 | 37.949 A-Q2 | 27.177 A-Q2 | 28.168 A-Q2 |
| 2 | Porsche GT4 Clubsport | Ryan Szyjakowski | T1 | 109 | 1:34.065 A-Q2 | 1:33.662 | 1:34.065 A-Q2 | 1:35.563 A-R2 | 140.3 A-Q1 | 37.970 A-Q2 | 27.281 A-Q2 | 28.411 A-Q2 |
| 3 | Ford Mustang FP350S | Andrew O'Donnell | T1 | 81 | 1:44.331 A-R2 | 1:44.331 | 1:44.331 A-R2 | 136.8 A-R2 | 42.440 A-R2 | 30.368 A-R2 | 31.523 A-R2 |
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 → In 1.19 mi
- S2 In → I6A 0.56 mi
- S3 I6A → SF 0.65 mi
- SPd In → Out 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 |
|---|---|---|---|---|---|---|---|---|---|
| BMW M3 | T1 | 1 | 1:33.603Brian Goodman | 1:33.603Brian Goodman | 1:34.796Brian Goodman | 137.0Brian Goodman | 37.949Brian Goodman | 27.177Brian Goodman | 28.168Brian Goodman |
| Porsche GT4 Clubsport | T1 | 1 | 1:34.065Ryan Szyjakowski | 1:34.065Ryan Szyjakowski | 1:35.563Ryan Szyjakowski | 140.3Ryan Szyjakowski | 37.970Ryan Szyjakowski | 27.281Ryan Szyjakowski | 28.411Ryan Szyjakowski |
| Ford Mustang FP350S | T1 | 1 | 1:44.331Andrew O'Donnell | 1:44.331Andrew O'Donnell | 136.8Andrew O'Donnell | 42.440Andrew O'Donnell | 30.368Andrew O'Donnell | 31.523Andrew O'Donnell |
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 2016 → Great Lakes Champions 2026 2016-09-19 to 2026-05-15
T1 Request to Classify Ford FP350S in T1-LP
#25341 from Touring Committee · Rule change · TB 19-01 (2019-01 Fastrack)
In T1, Classify the Ford Mustang FP350S (2018), as follows:
A specification table follows in the original; it is not shown here.
T1 Amendment to Request #25555
#25556 from Sean Reilly · Rule change · TB 19-01 (2019-01 Fastrack)
In 9.1.9.1.N.5, make changes as follows:
“Suspension components shall be the stock OEM parts, but they may be reinforced. Spherical
bearings are permitted on suspension components. Standard suspension bushings may be
replaced with solid or spherical bushings. Alternate control arms permitted.”
“17. Alternate control arms permitted.”
T1 Request to balance 996 v 997 T1 weight
#25658 from Jake Namer · Rule change · TB 19-01 (2019-01 Fastrack)
In T1, Porsche 996, make changes to weight and engine notes as follows:3200 3000
“GT3 Cup, GT3 RSR, GT3 RS, GT America not allowed.”
In T1, Porsche 996 GT3 Cup (02-05), change the weight as follows:3150 3000
In T1, Porsche 997, change the weight as follows:3150 3100
T1 Request to Add PDK Transmission to 997 Porsche Spec Line
#25668 from Craig Anderson · Rule change · TB 19-01 (2019-01 Fastrack)
Please classify the Porsche 997 as follows:
A specification table follows in the original; it is not shown here.
T1 T1 World Challenge/Grand AM Spec Cars
#25687 from DAVID MEAD · Rule change · TB 19-01 (2019-01 Fastrack)
In T1, Acura NSX Turbo World Challenge, make changes to weight, restrictor and notes as
follows:3000 310045mm 44mm
“Must conform to World-Challenge VTS Dated 8.19.2009 Version Number: 3 Version Date:
6.15.2000 and World-Challenge Appendix A 2010 that limits tire and wheel size: Max Tire
Size: 245/40 F, 295/30 R. Wheels Max Size: 17x9 Front, 18x11 Rear. No other touring
modifications or allowances permitted beyond the VTS and Appendix A allowances and notes
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in this spec line notes.”
T1 Add Clarification to Spec Car Classifications Vehicle Spec
#25774 from Touring Committee · Rule change · TB 19-01 (2019-01 Fastrack)
Lines
In T1, Porsche Cayman GTS (2011), add to notes as follows:
“Must conform to 7/15/2015 version 15 VTS. TC aftermarket ABS controller allowed. PDK
Permitted +100lbs. No other touring modifications or allowances permitted beyond the noted
VTS and these spec line allowances.”
In T1, Audi TTRS (GTS 2011 Spec), add to notes as follows:
“Must conform to December 14th, 2011 revision 3 GTS rules. No other touring modifications
or allowances permitted beyond the noted GTS rules allowances.”
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In T1, Ferrari 430 Challenge, add to notes as follows:
“As homologated. DOT tires per 9.1.4.P.1; weight as specified; side windows must be
removed; OEM carbon brakes or the Ferrari steel brakes from the 360 Challenge car (F
355 x 32 vented disc, R 330 x 18 vented disc) are permitted; If 18 inch “360” brakes are
used, 18 inch wheels are permitted; 19 inch Ferrari Challenge wheels as delivered from
factory permitted. Non-OEM rear wing / splitter reduce restrictor by 5 mm. No other touring
modifications or allowances permitted.”
In T1, Porsche 996 GT3 Cup (02-05), add to notes as follows:
“996 required gear ratios: Crown wheel and pinion 8/32; 1st gear 13/41, 2nd gear 20/40, 3rd
gear 25/39, 4th gear 29/36 or 26/34, 5th gear 32/33 or 32/35, 6th gear 35/30 or 34/31. No
other touring modifications or allowances permitted except as noted in this spec line.”
In T2, BMW M235iR (-2016), add to notes as follows:
“As homologated from BMW Motorsports No other changes or touring rule allowances
permitted. Must conform to World-Challenge VTS 2/25/2016 rev.2.”
In T2, Nissan 350Z Track/ Touring/ Standard/ Nismo Spec Z (03-08), add to notes as follows:
“SPL rear toe links part# SPL RTA Z33 permitted. Stillen part #400338 permitted. Must
conform to all SpecZ 2018 Edition rules. No other touring allowances beyond 2018 SpecZ
edition rules or allowances listed here.”
In T2, Porsche Spec Cayman, add to notes as follows:
“Must conform to all SPC rules in the PCA rulebook. Each competitor shall have available
definitive current documentation of the PCA rules. Spec Cayman tires permitted per Spec
Cayman rules. Must use DOT tires. No other touring allowances permitted.”
In T2, Spec Mustang, add to notes as follows:
“Must meet all requirements of Spec Mustang rules located in the Appendices. Cars must
Comply with all SCCA T2 graphics and marking rules, including the posting of minimum
weight. It is the responsibility of the driver to declare if its running under T2 rules or SMG rules
- no mixing between rules.In T3, BMW SpecE46, add to notes as follows:
“Must conform to all SpecE46 rules in Appendix N. SpecE46 spec tire permitted per SpecE46
appendix rules or any DOT permitted. No other touring allowances permitted.”
In T3, Nissan 350Z Track/ Touring/ Standard/ Nismo (03-08) Spec Z, add to notes as follows:
“DE Engine: 57mm flat plate restrictor required. Zspeed and Z1 alternative clutch slave
permitted. Must conform to all SpecZ 2018 Edition rules. No other touring allowances beyond
2018 SpecZ edition rules or allowances listed here.”
In T3, Porsche Spec Boxster, add to notes as follows:
“Must conform to all SPB rules in the PCA rulebook. Each competitor shall have available
definitive current documentation of the PCA rules. Tires must meet 2016 SPB rules or any 225
DOT tire permitted. No other touring allowances permitted.”
T1 Request Mustang GT Limited Prep 2018 Classification
#24431 from Joe Aquilante · Rule change · TB 19-03 (2019-03 Fastrack)
In T1-LP, Ford Mustang GT (2015-), add to the year as follows:
“(2015-2017)”
In T2, Ford mustang GT 5.0L (2015-), add to the year as follows:
“(2015-2017)”
In T3, Ford Mustang V6 (2015-), add the year as follows
“(2015-2017)”
In T1-LP, classify the Ford Mustang GT 5.0L (2018-) as follows:
A specification table follows in the original; it is not shown here.
T1 Request to classify the Porsche 928GTS/S4 in Touring 1
#26315 from Mark Kibort · Rule change · TB 19-04 (2019-04 Fastrack)
In T1, classify the Porsche 928 S4/ Porsche 928 GTS-R, as follows:
A specification table follows in the original; it is not shown here.
T1 Request to Classify EcoBoost Mustang
#25841 from Scotty B White · Rule change · TB 19-05 (2019-05 Fastrack)
In T1, classify the Ford Ecoboost engine as follows:
A specification table follows in the original; it is not shown here.
T1 Request Corvette aerodynamic aids
#26265 from James Candelaria · Rule change · TB 19-05 (2019-05 Fastrack)
In T1, Chevrolet Corvette Cadillac XLR (04-09), add to notes as follows:
“C5 body only: Corvette OE equivalent aero parts allowed: C7 Carbon C7-CCC5EX-
RSP-GB, C7-CCC5-SS-GB, C7-CCC5-FS-GB, +50lbs.”
T1 Audi TTRS VTS Documentation Revision
#26578 from Colin Cohen · Rule change · TB 19-05 (2019-05 Fastrack)
In T1, Audi TTRS (GTS 2011 Spec), make changes to chassis notes as follows:
“Must conform to December 14th, 2011 July 24th, 2015 revision 3 7 GTS rules.”
T1 Request Ride Height Clarification
#26599 from SCCA Staff · Rule change · TB 19-05 (2019-05 Fastrack)
In GCR section 9.1.9.1.D.5, add as follows:
“Ride height will be measured without driver at the lowest point of the rocker panel, not
including the pinch weld. Minimum ride height is 3.5 inches.”
T1 Opposes Unfair weight and throttle restrictor
#26719 from Mark Kibort · Rule change · TB 19-05 (2019-05 Fastrack)
In T1, Porsche 928 S4/ Porsche 928 GTS-R, make changes to weight and restrictor as follows:
“3500 3200”
“60mm flat plate restrictor”
T1 Clarify DOT tires touring
#26556 from Touring Committee · Rule change · TB 19-06 (2019-06 Fastrack)
In GCR section 9.1.9.2.7.b, T2-T4, make changes to Tires as Follows:
"Unless otherwise so noted on a vehicle’s TCS line, all cars shall run the tire size as listed for the vehicle in the TCSor an authorized replacement size. When authorized replacement tires are used, the same size tire shall be used oneach axle (front tires need not be the same size as rear tires). Tires must conform to GCR section 9.3. Tires. All
tires shall be offered for sale over the counter through the manufacturer’s tire dealer network. The brand of tire
and tire pressures are unrestricted. All cars shall run tires with a minimum of a “U” speed rating. Tires must be
DOT certified. The tire size on a vehicle spec line is a maximum unless otherwise noted. Touring spec line tire
classification supersedes all other rules. For size determination, the molded section shall be used."
T1 Request BoP Baten - T1 Camaro - Follow up to Letter # 26145
#26900 from Bill Baten · Rule change · TB 19-07 (2019-07 Fastrack)
In T1, Cadillac CTS/CTS-V Chevrolet Camaro Pontiac Firebird Pontiac GTO, make changes
to the restrictor as follows:
"6162 67 70mm Flat Plate"
T1 Request to return Ford Mustang Challenge Car to T1
#26751 from Bruno Stockinger · Rule change · TB 19-08 (2019-08 Fastrack)
In T1, GCR section 9.1.9.1 T1, classify the Ford Mustang Challenge as an E&O as follows:
T1 Maximum
Displ.
Min.
Weight
Required
Restrictor Engine Notes Chassis Notes
Ford Mustang Challenge 4600 cc 3300lbs none none Must be prepared to
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World Challenge GTS rules
dated 01/25/2011.
T1 Correct years in T1 FP Corvette spec
#27023 from Touring Committee · Rule change · TB 19-08 (2019-08 Fastrack)
In T1, GCR section 9.1.9.1, make changes to the spec line as follows:
"Chevrolet Corvette Cadillac XLR (04-09)"
T1 T1 LP 2016 Camaro and Later
#27198 from Joe Aquilante · Rule change · TB 19-09 (2019-09 Fastrack)
In T1-LP, Chevrolet Camaro 1LE (2016-), change the weight as follows:
"3600 3500"
In T1-LP, Chevrolet Camaro 1LE (2016-), change the notes as follows:
"53 70mm flat plate restrictor required."
T1 Request to include Subaru WRX/STI 02-18 in T1
#24916 from Joel Baez · Rule change · TB 20-02 (2020-02 Fastrack)
In T1 Spec Lines, add Subaru WRX, WRX STI 2005-2020
A specification table follows in the original; it is not shown here.
T1 Request Ford Mustang FP350S T1-LP weight and restrictor change
#26662 from Thomas Dewitt · Rule change · TB 20-02 (2020-02 Fastrack)
In GCR, T1-LP Spec Lines, Ford Mustang FP350S (2017), change notes as follows:
"Serial number 1-50 51 cars as delivered. Additional permitted allowances: DOT tires required. Other
consumables are open, alternate driveshaft permitted, aftermarket wheels and fuel cell per Touring
category rules permitted. 60mm 70mm flat plate restrictor. No other modifications permitted."
In GCR, T1-LP Spec Lines, Ford Mustang GT (15-17), change Weight as follows:
"3400 3500"
In GCR, T1-LP Spec Lines, Ford Mustang GT (15-17), change notes as follows:
"Ford Performance Handling Kit part #M-FR3A-M8, Sway Bars in M-FR3A-M8 kit part#M-5490-E, Rear
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Toe Bearing part #M-5A460-M, Strut Tower Brace part# M-20201-M,Camber Bolts M-3B236-A, Solid
Differential Bushings part #M-4425-M, Solid Subframe Bushings part #M- 5872-M, Dampers in Handling
Pack part #M-18000-F, OEM Performance Package Brembo front BBK 380mm permitted at no weight
penalty. at +100lbs. 2014 Mustang GT exhaust manifolds permitted. Springs up to 800#/in front and rear
permitted. Alternate metallic driveshaft permitted. Rear spring relocation to shock permitted with kit
TBD. Ford Racing oil pan #M-6675-M50BR permitted. Boss and Laguna intake manifold permitted.70mm flat plate restrictor required."
In GCR, T1-LP Spec Lines, Ford Mustang GT5.0L (2018-), change Weight as follows:
"3400 3500"
In GCR, T1-LP Spec Lines, Ford Mustang GT5.0L (2018-), change notes as follows:
"Ford Performance Handling Kit part #M-FR3A-M8, Sway Bars in M-FR3A-M8 kitpart#M-5490-E, Rear
Toe Bearing part #M-5A460-M, Strut Tower Brace part# M-20201-M,Camber Bolts M-3B236-A, Solid
Differential Bushings part #M-4425-M, Solid Subframe Bushings part #M- 5872-M, Dampers in Handling
Pack part #M-18000-F, OEM Performance Package Brembo front BBK 380mm permitted at no weight
penalty at +100lbs. 2014 Mustang GT exhaust manifolds permitted. Springs up to 800#/in front and rear
permitted. Alternate metallic driveshaft permitted. Rear spring relocation to shock permitted with kit
TBD. Ford Racing oil pan #M-6675-M50BR permitted. Boss and Laguna intake manifold permitted.65mm flat plate restrictor required."
A specification table follows in the original; it is not shown here.
T1 Request to classify Ford Coyote 3rd Gen OEM
#27145 from Cheyne Daggett · Rule change · TB 20-02 (2020-02 Fastrack)
In GCR 9.1.9.1, Ford Mustang/ Thunderbird, make change as follows:
"5000 Coyote OEM (15-16 17)"
In T1 full prep Spec Lines, add Ford Mustang/Thunderbird:
A specification table follows in the original; it is not shown here.
T1 Request alternate dashboard
#27276 from Miguelangel Aponte Rios · Rule change · TB 20-02 (2020-02 Fastrack)
In T1 Spec Lines, BMW M3 E92 (08-13), add the following to notes:
"Carbon Dash allowed with 25 lb penalty."
In T1 Spec Lines, BMW M3 E92 (08-13), add the following to notes:
"Carbon Dash allowed with 25 lb penalty."
Applies to BMW M3 on this page: Brian Goodman
T1 Request for Allowance of Coil Springs on Limited Prep C6 Corvette
#27713 from Adrian Wlostowski · Rule change · TB 20-02 (2020-02 Fastrack)
In T1-LP Spec Lines, Chevrolet Corvette C-5 Incl. Fxd. Cpe (98-04) Z06 (hardtop) (01-04), add to Chassis
Notes the following:
"Leaf spring suspension may be converted to conventional coilover suspension in T1 only."
In T1-LP Spec Lines, Chevrolet Corvette C6 Coupe (05-10) Grand Sport (10-13), add to Chassis Notes the
following:
"Leaf spring suspension may be converted to conventional coilover suspension in T1 only."
In T1-LP Spec Lines, Chevrolet Corvette Z06 (06-12), add to Chassis Notes the following:
"Leaf spring suspension may be converted to conventional coilover suspension in T1 only."
T1 Request for E46 wagon with S54 engine in T1
#27427 from James Gallagher · Rule change · TB 20-03 (2020-03 Fastrack)
In T1, BMW E46 M3 & E36 / BMW Z3, add models and change displacement as follows:
"BMW E46, E46-M3, E36, E36-M3, Z3""3200 3250"
Note: The wagon body is allowed. The BMW S54 engine is commonly thought of as a 3.2 liter engine,
while its actual displacement is 3250cc.
T1 Request 996 GT3 Trunk for Wing Allowance.
#28153 from JAKE NAMER · Rule change · TB 20-04 (2020-04 Fastrack)
In T1, Porsche 996 Spec Lines, add to Chassis Notes as follows:
"996 Cup Replica Rear deck lid allowed."
T1 All Touring, Change DOT Tire Language 9.1.9.1, 9.3.45
#28452 from Tim Myers · Rule change · TB 20-04 (2020-04 Fastrack)
In T1, Acura NSX Turbo World Challenge Spec Lines, add to Chassis Notes as follows:
"DOT tires required as per GCR section 9.3."
In T1, Audi TTRS (GTS 2011 Spec) Spec Lines, add to Chassis Notes as follows:
"DOT tires required as per GCR section 9.3."
T1 Additional Clarification on 996 Cup in T1 From Letter #28040
#28060 from Chris Arbuckle · Rule change · TB 20-05 (2019-05 Fastrack)
In T1, Porsche 996 GT3 Cup, change years as follows:
"(02-05) (98-04)"
T1 Request SPEC Corvette Rear Spolier
#28182 from John Nguyen · Rule change · TB 20-05 (2019-05 Fastrack)
In T1, Chevrolet Corvette Cadillac XLR, add to notes as follows:
"Cars using OE bodywork may install SCRSPLR-001 Rear spoiler."
T1 T1 Rear Brake Rotor Size Exemption for Gen 5 Camaro
#28402 from Clark Nunes · Rule change · TB 20-05 (2019-05 Fastrack)
In T1, Cadillac CTS/CTS-V Chevrolet Camaro Pontiac Firebird Pontiac GTO, add to the 6162 OEM chassis
notes as follows:
"Camaro OEM 366mm rear rotor and caliper allowed without weight penalty."
T1 Consider coil spring conversion Corvette in T2
#28824 from Touring Committee · Rule change · TB 20-06 (2020-06 Fastrack)
In T2 Spec Lines, Chevrolet Corvette C-5 Incl. Fxd Cpe (98-04) Z06 (hardtop) (01-04), add to Notes as
follows:
"Aftermarket leaf spring suspension allowed 800 lb max. Coilover suspension allowed coil springs
allowed 800 lb max."
In T2 Spec Lines, Chevrolet Corvette C6 Coupe / Grand Sport (05-13), add to Notes as follows:
"Aftermarket leaf spring suspension allowed 800 lb max. Coilover suspension allowed coil springs
allowed 800 lb max."
In T2 Spec Lines, Chevrolet Corvette Z06 (06-12), add to Notes as follows:
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"Aftermarket leaf spring suspension allowed 800 lb max. Coilover suspension allowed coil springs
allowed 800 lb max."
In T1 Spec Lines, Chevrolet Corvette Z06 (06-12), change Notes as follows:
"Leaf spring suspension may be converted to conventional coilover suspension in T1 only."
T1 Touring Gurney flap wicker clarification
#29013 from SCCA Staff · Rule change · TB 20-08 (2020-08 Fastrack)
In T1, GCR section 9.1.9.1.B.2, clarify wording as follows:
"c. Wings shall be a single element and single plane with a maximum chord length of 12.00
inches, including any wicker Gurney flap. (except as allowed in 9.1.9.1.B.2.h)."
"e. The entire rear wing assembly, including the end plates and any wicker Gurney flap, shall be
mounted level with, or below, the peak of the roof."
T1 Changes to Corvette C8
#29898 from Club Racing Board · Rule change · TB 20-12 (2020-12 Fastrack)
In T1, Chevrolet Corvette C8, Z51 2020-, change as follows:
Max Wheel Size: "19 x 10 11(f) 20 x 11 13(r)"
Tire Size: "275 315 (f) 315 335 (r)"
Weight: "3650 3550"
T1 Correct T1 Limited Prep Years
#29708 from Joe Aquilante · Rule change · TB 21-01 (2021-01 Fastrack)
In T1-LP Spec Lines, Chevrolet Corvette Z06 (06-12), change years as follows:
"(06-12 13)"
T1 Request to Clarify Miller Mustang Classification
#28728 from David Mead · Rule change · TB 21-02 (2021-02 Fastrack)
In T1 Spec Lines, Ford Mustang Challenge, change Maximum Displ. as follows:
"4600/5000 3-valve"
Applies to Ford Mustang FP350S on this page: Andrew O'Donnell
T1 BMW E46 Carbon Dash
#29806 from Murat Ketenci · Rule change · TB 21-02 (2021-02 Fastrack)
In T1, GCR Section 9.1.9.1.C.5., change as follows:
"Stock dash/instrument panel cover (dash pad) must be used. Original instruments/gauges may be replaced, or supplemented,
with additional engine monitoring gauges. Accessories, lights and switches may be added or removed. Box-type extensions from
the dash pad may be used to mount switches and controls, in the areas where the OEM insert panels were mounted, so that
they more easily accessible to the driver. Audio and video systems may be removed. Alternative (i.e. carbon or fiberglass) OEM
style and Configuration dashboards may be used with a 25 pound penalty."
T1 Request to Update T1 Mustang Spec Line
#30001 from DAVID WOODLE · Rule change · TB 21-02 (2021-02 Fastrack)
In T1 Spec Lines, Ford Mustang/ Thunderbird, change as follows:
"Ford Mustang/ Thunderbird
Shelby/Shelby GT350/GT500 (-2018)"
Applies to Ford Mustang FP350S on this page: Andrew O'Donnell
T1 Dodge Viper 8400 OEM???
#30174 from Scotty White · Rule change · TB 21-02 (2021-02 Fastrack)
In T1, classify Dodge Viper ACR, as follows:
T1 Maximum
Displ.
Min.
Weight
Required
Restrictor Engine Notes Chassis Notes
Dodge Viper ACR 8400 OEM 3600 (2) 55mm flat
A specification table follows in the original; it is not shown here.
T1 Class BMW M2CS Club Sport
#30195 from Touring Committee · Rule change · TB 21-02 (2021-02 Fastrack)
In T1-LP Spec Lines, classify BMW M2CS Club Sport Racing, as follows:
T1 997.1 GT3 Cup
#30229 from Touring Committee · Rule change · TB 21-02 (2021-02 Fastrack)
In T1, classify the Porsche 997.1 GT3 Cup (2006-2011) as follows:
T1 Maximum
Displ.
Min.
Weight
Required
Restrictor Engine Notes Chassis Notes
Porsche 997.1 GT3 Cup (2006-
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2011)
3600cc 3150 ABS allowed with 100lb penalty.
Cars must be prepared in
accordance with the appropriate
model/year Porsche factory 911
GT3 Cup parts catalog/service
manual. Cars may not be altered in
any way except as authorized
below. Drivers must have the
correct year manuals as they apply
to their specific car in their
A specification table follows in the original; it is not shown here.
T1 T1 LP Aero adjustments
#30196 from Touring Committee · Rule change · TB 21-03 (2021-03 Fastrack)
In GCR Section 9.1.9.1., Limited T1, change as follows:
"See Limited Preparation (LP) T1 specification lines for the list of cars permitted to run in T1 in a limited preparation level
configuration. These cars shall be prepared to the T2 level of preparation found in 9.1.9.2. with the following additional
allowances:Aftermarket headers allowed. Limited prep cars running stock OEM manifold/headers as delivered may subtract50lbs. from the specified weight.
In addition to T2 specifications all T1-LP cars are permitted to:
1. Relocate the battery
2. Use any commercially available battery.
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3. Replace any suspension bushing with spherical joints.
4. Use any spring and/or sway bar rate, configuration must remain OE. Ferrous springs and sway bars only.
5. Hoods, trunk lids, and front fenders may be replaced with panels of any type material, provided that the panel maintains the
OEM profiles.
6. Aftermarket headers allowed.
7. Weight and Aerodynamic Devices
a. Any limited prep car not using a wing and/or splitter may subtract 100lb.
b. Aerodynamic devices conforming to 9.1.9.1.B.1 and 9.1.9.1.B.2 are permitted.
8. All vehicles must use a stock, OEM equivalent, safety glass, or 6 mm minimum thickness Lexan replacement, mounted in the
stock location, at the stock angle and maintaining the stock profile.
9. Engine durability allowances-
a) Rods and pistons may be replaced with aftermarket alternatives provided; 1)that the weight of the replacement is equal to or
greater than OE. 2) The bore, stroke, and displacement conform to T2 rules (9.1.9.2.D.1.e.1) 3)alternative pistons maintain OE
profile.
b) Valves may be replaced with aftermarket alternatives provided; 1)that the weight of the replacement is equal to or greater
than OE. 2) they are the same size and profile as OE.
c) Valve springs may be replaced with aftermarket alternatives provided they are the same configuration and size as OE +/-.015".
10. Driveshaft and half-shafts may be aftermarket, but shall be the OEM-type and use the same types of materials as stock. Drive
shafts may be replaced by one piece drive shafts, and conversely."
T1 Request For Reduction in Weight/Penalties for Camaro
#30443 from Bill Baten · Rule change · TB 21-05 (2021-05 Fastrack)
In T1 Spec Lines, Cadillac CTS/CTS-V Chevrolet Camaro w/6162 Displacement, change Min. Weight as follows
"3550 00"
T1 Fix dry sump Contradictions in T1-LP vs T2
#30596 from Touring Committee · Rule change · TB 21-05 (2021-05 Fastrack)
In T1-LP Spec Lines, Chevrolet Corvette C-5 Incl. Fxd. Cpe (98-04) Z06 (hardtop) (01-04), change Notes as follows:
"ARE dry sump kit #3021S, Aviad dry sump kit #008-10001 or Dailey dry sump kit permitted: #20-02-0666-assy permitted. 04 90
2371. Leaf spring suspension may be converted to conventional coil over suspension in T1 only."
In T1-LP Spec Lines, Chevrolet Corvette C6 Coupe (05-10) Grand Sport (10-13), change Notes as follows:
"ARE dry sump kit #3021S, Aviad dry sump kit #008-10001 or Dailey dry sump kit permitted: #20-02-0666-assy permitted, Daileydry sump kit permitted: 20-02-0666-assy,04 90 2371. Leaf spring suspension may be converted to conventional coilover
suspension in T1 only."
In T1-LP Spec Lines, Chevrolet Corvette Z06 (06-13), change Notes as follows:
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"ARE dry sump kit #3021S, Aviad dry sump kit #008-10001 or Dailey dry sump kit permitted: #20-02-0666-assy permitted, Daileydry sump kit permitted: 20-02-0666-assy,04 90 2371. Leaf spring suspension may be converted to conventional coilover
suspension in T1 only."
T1 T1-LP - Add Performance Pack, Bullet, Mach 1 to 18+ Mustang
#29849 from Andrew Aquilante · Rule change · TB 21-06 (2021-06 Fastrack)
In T1-LP Spec Lines, Ford Mustang GT5.0L (2018-), add to Notes as follows:
"Performance Pack, Bullet or Mach-1 options allowed with 100lb penalty."
In T1 Spec Lines, Ford Mustang Shelby/Shelby GT350/GT500 (-2018) 5000 Coyote OEM (18-), change Restrictor Required as
follows:
"65mm 70mm Flat Plate"
In T1 Spec Lines, Ford Mustang Shelby/Shelby GT350/GT500 (-2018) 5000 Coyote OEM (18-), add to Notes as follows:
"Performance Pack, Bullet or Mach-1 options allowed with 100lb penalty."
T1 Request BoP for the Viper in 1 LP
#29968 from Scotty White · Rule change · TB 21-06 (2021-06 Fastrack)
In T1-LP Spec Lines, Dodge Viper SRT-10 Incl. Coupe (08-10), change Notes as follows:
"45mm 57mm"
T1 Request to classify C7 and 13Viper in T1 LP
#29969 from Scotty White · Rule change · TB 21-06 (2021-06 Fastrack)
In T1-LP Spec Lines, Chevrolet Corvette C7, change as follows:
"Chevrolet Corvette C7 incl. Grand Sport"
In T1-LP Spec Lines, Chevrolet Corvette C7, change Notes as follows:
"70 73 mm"
T1 Request LP Z06 steel chassis
#30589 from DAVID WOODLE · Rule change · TB 21-06 (2021-06 Fastrack)
In T1-LP Spec Line, Chevrolet Corvette Z06 (06-13), add to Notes as follows:
"Aluminum chassis may be replaced with an equivalent OE steel chassis."
T1 Request BoP for the Viper in 1 LP
#29968 from Scotty White · Rule change · TB 21-07 (2021-07 Fastrack)
In T1-LP Spec Lines, Dodge Viper SRT-10 Incl. Coupe (08-10), change Notes as follows:
"45mm 57mm"
T1 LS6 Alternative Head Question
#30074 from Matthew Henschen · Rule change · TB 21-07 (2021-07 Fastrack)
In T1 Spec Lines, Chevrolet Corvette Cadillac XLR, add to Chassis Notes the following:
"Casting #799 heads are permitted on LS6 engines, no other modifications to the head allowed."
T1 T1 E46 BOP E&O for Letter # 29970
#30934 from Touring Committee · Rule change · TB 21-08 (2021-08 Fastrack)
In T1 Spec Lines, BMW E46, E46-M3, E36, E36-M3, Z3, change as follows:
Min Weight: "2600 2700"
Engine Notes: "The 3.4L (87.0 bore x 93.0 stroke) engine is permitted at 2650 lbs 2750 lbs."
T1 Turbo Miata Help
#31315 from Chris Edens · Rule change · TB 21-12 (2021-12 Fastrack)
In T1 Spec Lines, Mazda MX-5 Miata MazdaSpeed, change Min. Weight as follows:
"2350 2550"
In T1 Spec Lines, Mazda MX-5 Miata MazdaSpeed, change Required Restrictor as follows:
"39mm 42mm"
T1 Fix the T1 Corvette heading
#31528 from Touring Committee · Rule change · TB 21-12 (2021-12 Fastrack)
In T1 Spec Lines, Chevrolet Corvette Cadillac XLR, add as follows:
"Chevrolet Corvette Cadillac XLR (-2019)"
T1 Weight reduction E&O
#30791 from Clark Nunes · Rule change · TB 22-03 (2022-03 Fastrack)
In T1 Spec Lines, Cadillac CTS/CTS-V Chevrolet Camaro Pontiac Firebird Pontiac GTO 6162 Displ. GM LS3, change Min. Weight as
follows:
"3500 3475"
T1 Performance Adjustment Request for Camaro
#31521 from MITCHELL BENDER · Rule change · TB 22-03 (2022-03 Fastrack)
In T1 Spec Lines, Cadillac CTS/CTS-V Chevrolet Camaro Pontiac Firebird Pontiac GTO, 7011 Max. Displ., change weight as follows:
"3550 3500"
T1 Remove 33m Brake rotor thickness rule
#31954 from Andrew Aquilante · Rule change · TB 22-03 (2022-03 Fastrack)
In GCR. Section 9.1.9.1.O.11, change as follows:
"Rotors- 1 or 2 piece ferrous rotors that do not exceed 355mm in diameter or 33mm in thickness are permitted. Maximum brake
rotor diameter of 380mm is permitted at a 100 pound penalty."
T1 Viper/Z06 Parity
#31942 from Scotty B White · Rule change · TB 22-04 (2022-04 Fastrack)
In T1 Spec Lines, Dodge Viper ACR, change as follows:
Car: "Dodge Viper ACR / SRT RT-10"
Maximum Displ.: "8300 8400 OEM"
Min. Weight: "3600 3550"
T1 Discrepancy in T1 allowances
#32293 from Touring Committee · Rule change · TB 22-04 (2022-04 Fastrack)
In T1, GCR Section 9.1.9.1. Limited T1, change as follows:
"In addition to T2 specifications all T1-LP All T1 cars are permitted to:"
T1 T1 RX7 classification
#32352 from Touring Committee · Rule change · TB 22-04 (2022-04 Fastrack)
In T1 Spec Lines, classify Mazda RX-7, as follows:
T1 Maximum
Displ.
Min.
Weight
Required
Restrictor Engine Notes Chassis Notes
Mazda RX-7 2700lbs 44mm TIR 13B Rotary A single Garrett Turbo #3076
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permitted
T1 Fix FP350S limited prep and Shelby 350 full prep issues
#31680 from Tim Myers · Rule change · TB 22-06 (2022-06 Fastrack)
In T1-LP Spec Lines, Ford Mustang FP350S (2017), change restrictor as follows:
"70mm 75mm"
T1 Request to Classify AMG GT4
#32610 from Mark Boden · Rule change · TB 22-06 (2022-06 Fastrack)
In T1 Spec Lines, classify Mercedes Benz AMG GT4 (2017-2021) as follows:
T1 Maximum
Displ.
Min.
Weight
Required
Restrictor Engine Notes Chassis Notes
Mercedes Benz AMG GT4
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(2017-2021)
3982cc 3400 HP controlled
with required
program
SRO Power level 2
2019 map
required.
The car must be raced as FIA
homologated. Must participate at
3 Super Tour races to establish
Runoffs eligibility. Visual
verification of “SRO power level 2”
on dashboard required. Must
conform to DOT tire rule.
T1 Correct Camaro Spec Line From Letter #30791 response to 3475lbs
#32824 from Clark Nunes · Rule change · TB 22-08 (2022-08 Fastrack)
In T1 Spec Lines, Cadillac CTS/CTS-V Chevrolet Camaro Pontiac Firebird Pontiac GTO 6162 OEM, change Min. Weight as follows:
"3500 3475"
T1 GT4 section to Current T1 Rules.
#33632 from Touring Committee · Rule change · TB 23-01 (2023-01 Fastrack)
In T1, Spec Lines, add the following Spec Lines to the current spec lines:
A specification table follows in the original; it is not shown here.
T1 Corrections to T1 Spec Lines
#33678 from Touring Committee · Rule change · TB 23-02 (2023-02 Fastrack)
In Touring 1 - GT4 Spec Lines, Maclaren 570S GT4, change Tire Size (max) as follows:
"285 (f)
315 (r)"
T1 Sequential Gearbox Limitations in T1
#33691 from David Mead · Rule change · TB 23-03 (2023-03 Fastrack)
In GCR, Section 9.1.9.1.I.4., change as follows:
"Aftermarket sequential transmissions are permitted. Cars with aftermarket sequential shift transmissions shall utilize a 1:1 (or
greater/overdriven) ratio in top gear. Transmission location must be OEM. Maximum bellhousing length is 10 inches. Cars that
don’t use an aftermarket sequential transmission may decrease their competition weight by 100 lbs."
T1 T1 GT4 adjustments
#33786 from Touring Committee · Rule change · TB 23-03 (2023-03 Fastrack)
In Touring 1 - GT4 Spec Lines, change Min. Weight with Driver (LBS) as follows:
Aston Martin Vantage AMR GT4: "3575 3450"
Audi R8 GT4: "3550 3425"
BMW M4 GT4: "3500 3375"
Ford Mustang GT4: "3550 3425"
Maclaren 570S GT4: "3450 3325"
Mercedes AMG GT4: "3450 3325"
Porsche 718 Cayman GT4 CS MR: "3200 3075"
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Porsche 718 GT4 RS Clubsport: "3450 3325"
Toyota Supra GR GT4: "3350 3225"
T1 Sunset of pre 2023 Touring 1 Rules.
#33916 from Touring Committee · Rule change · TB 23-03 (2023-03 Fastrack)
In T1, GCR Section 9.1.9.1.A., remove in its entirety.
In T1 Spec Lines, remove in its entirety.
T1 Clarification for Camaro Gen5 2010-2015
#33739 from Clark Nunes · Rule change · TB 23-04 (2023-04 Fastrack)
In T1 Spec Lines, Chevrolet Camaro Gen 5 ('10-'15) Including SS, Z28, classify Spec Line Number 1135 as follows:
A specification table follows in the original; it is not shown here.
T1 T1 GT4 adjustments
#33786 from Touring Committee · Rule change · TB 23-05 (2023-05 Fastrack)
RM 23-04 – Touring 1 weights dated 3/21/2023
As an E&O to the February Fastrack, in T1-GT4 leave weights as follows:
Aston Martin Vantage AMR GT4: 3575
Audi R8 GT4: 3550
BMW M4 GT4: 3500
Ford Mustang GT4: 3550
Maclaren 570S GT4: 3450
Mercedes AMG GT4: 3450
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Porsche 718 Cayman GT4 CS MR: 3200
Porsche 718 GT4 RS Clubsport: 3450
Toyota Supra GR GT4: 3350
T1 Touring 1 Tire Sizes
#34191 from Club Racing Board · Rule change · TB 23-05 (2023-05 Fastrack)
RM 23-05 – Touring 1 Tire Sizes dated 3/21/2023
In T1-GT4 change tire sizes as follows:
Maclaren 570S GT4 (f)285 315(r)315
Mercedes AMG GT4 (f)275 315(r)315
T1 Request to reinstate T1 S197 Mustang
#34048 from David Mead · Rule change · TB 23-06 (2023-05 Fastrack)
In T1 Spec Lines, classify Ford Mustang S197 (05-14) Includes GT, Boss302, 302S, 302R, FR500C, FR500S as follows:
A specification table follows in the original; it is not shown here.
Applies to Ford Mustang FP350S on this page: Andrew O'Donnell
T1 Gen 5 Camaro Engine
#33875 from Matt Spicuzzi · Rule change · TB 23-06 (2023-07 Fastrack)
In T1-NEW Spec Lines, Chevrolet Camaro Gen 5 (10-15) Including SS, Z28, classify Spec Line Number 1131 and 1136 as follows:
A specification table follows in the original; it is not shown here.
T1 Inquiry to letter #33682
#34071 from Andrew Aquilante · Rule change · TB 23-06 (2023-07 Fastrack)
In T1 NEW Spec Lines, Chevrolet Camaro Gen 5 (10-15) Including SS, Z28, change Engine Notes as follows:
1130: "May resleeve any LS block to LS3 bore/ stroke for Engine replacement. May resleeve to stock parameters for engine repair
or replacement."
1135: "May resleeve any LS block to LS3 bore/ stroke for Engine replacement.May resleeve to stock parameters for engine repair
or replacement."
In T1 NEW Spec Lines, Chevrolet Corvette C5 (‘97-’04) – Includes: Z06, Coupe, Convertible, change Engine Notes as follows:
1132: "May resleeve any LS block to LS3 bore/ stroke for Engine replacement. May resleeve to stock parameters for engine repair
or replacement."
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1134: "May resleeve any LS block to LS3 bore/ stroke for Engine replacement. May resleeve to stock parameters for engine repair
or replacement."
1136: "May resleeve any LS block to LS3 bore/ stroke for Engine replacement. May resleeve to stock parameters for engine repair
or replacement."
1138: "May resleeve any LS block to LS3 bore/ stroke for Engine replacement. May resleeve to stock parameters for engine repair
or replacement."
In T1 NEW Spec Lines, Chevrolet Corvette C6 (05-13) - Includes Z51, GrandSport, Z06, Z06 Carbon, change Engine Notes as
follows:
1150: "May resleeve any LS block to LS3 bore/ stroke for Engine replacement. May resleeve to stock parameters for engine repair
or replacement."
1160: "May resleeve any LS block to LS3 bore/ stroke for Engine replacement. May resleeve to stock parameters for engine repair
or replacement."
1170: "May resleeve any LS block to LS3 bore/ stroke for Engine replacement. May resleeve to stock parameters for engine repair
or replacement."
1180: "May resleeve any LS block to LS3 bore/ stroke for Engine replacement. May resleeve to stock parameters for engine repair
or replacement."
1190: "May resleeve any LS block to LS3 bore/ stroke for Engine replacement. May resleeve to stock parameters for engine repair
or replacement."
T1 Viper Cleanup
#34107 from Scotty B White · Rule change · TB 23-06 (2023-05 Fastrack)
In T1 NEW Spec Lines, Dodge Viper ACR/ACR-X Spec Line 1360, change Required Restrictor as follows:
"50mm 60mm flat plate"
T1 Viper 8300 OEM FPR Size
#34268 from Scotty B White · Rule change · TB 23-06 (2023-05 Fastrack)
In T1 NEW Spec Lines, Dodge Viper ACR/ACR-X Spec Line 1370, change Required Restrictor as follows:
"(2) 47mm 55mm flat plates"
In T1 NEW Spec Lines, Dodge Viper ACR/ACR-X Spec Line 1390, change Required Restrictor as follows:
"(2) 60mm 55mm flat plates"
T1 Ford Mustang S197 (05-14) Clarification
#34450 from Club Racing Board · Rule change · TB 23-06 (2023-05 Fastrack)
In T1-NEW Spec lines, Ford Mustang S197 (05-14) Includes GT, Boss302, 302S, 302R, FR500C, FR500S, change Notes as follows:
"OEM 8.8 Differential Housing"
T1 C5 Approved Aero That Was Mistakenly Deleted
#34374 from Joe Aquilante · Rule change · TB 23-08 (2023-08 Fastrack)
In T1 NEW Spec Lines, Chevrolet Corvette C5 (‘97-’04) – Includes: Z06, Coupe, Convertible, Spec Lines 1132-1138, add to Notes
as follows:
"Any option of OEM Bodywork parts may be used as basis for aero measurements. Rear spoiler max 5” Above bumper allowed.
+50lbs. The following parts are permitted, with a 50lb decrease from base weight, in lieu of the aero options permitted in
9.1.9.1.B: (C7Carbon Rear- Spoiler CCC5 EX- RSB-GB, Vented Front Splitter CCC5-FS-GB, Side Skirts CCC5 SS-GB.)"
T1 Why no Camaro?
#34421 from Scotty B White · Rule change · TB 23-08 (2023-05 Fastrack)
In T1 GT4 Spec Lines, classify Chevrolet Camaro GT4-R as follows:
A specification table follows in the original; it is not shown here.
T1 Request to Remove Expiration from T1 spec lines #1350 & #1370
#34470 from Scotty B White · Rule change · TB 23-08 (2023-05 Fastrack)
In T1 NEW Spec Lines, Dodge Viper ACR / SRT RT-10, change Spec Line Number as follows:
"1350 *Spec line Expires 12/23*"
In T1 NEW Spec Lines, Dodge Viper ACR/ACR-X, change Spec Line Number as follows:
"1370 *Spec line Expires 12/23*"
T1 Remove
#34475 from Touring Committee · Rule change · TB 23-08 (2023-05 Fastrack)
In T1 GT4 Spec Lines, Maclaren 570S GT4, Spec Line Number 4050, remove Notes as follows:
"**NOT YET ELLIGIBLE FOR RUNOFFS COMPETITION (Q.2)**"
In T1 GT4 Spec Lines, Mercedes AMG GT4, Spec Line Number 4060, remove Notes as follows:
"**NOT YET ELLIGIBLE FOR RUNOFFS COMPETITION (Q.2)**"
T1 GT4 Spec Lines, Porsche 718 Cayman GT4 CS MR, Spec Line Number 4070, remove Notes as follows:
"**NOT YET ELLIGIBLE FOR RUNOFFS COMPETITION (Q.2)**"
T1 Error in T1 GT4 numbering scheme-
#34578 from Touring Committee · Rule change · TB 23-08 (2023-05 Fastrack)
In T1 GT4 Spec Lines, BMW M4, change Spec Line Number as follows:
"4050 4030"
T1 New T1 add spec line for C5 corvette LS2 engines (Copy from C6)
#33764 from Craig Anderson · Rule change · TB 23-12 (2023-09 Fastrack)
In T1 Spec Lines, classify Chevrolet Corvette C5 (‘97-’04) – Includes: Z06, Coupe, Convertible as follows:
A specification table follows in the original; it is not shown here.
T1 2004 - 2006 Pontiac GTO Re-Integration Back Into T1
#34403 from Ed Gless · Rule change · TB 23-12 (2023-12 Fastrack)
In T1 Spec Lines, classify Pontiac GTO 2006-2009 as follows:
A specification table follows in the original; it is not shown here.
T1 Request to Classify Porsche 997-1 GT3 Cup
#34561 from Scotty B White · Rule change · TB 23-12 (2023-12 Fastrack)
In T1 Spec Lines, delete the Porsche 996 GT3 Cup car from the standard spec lines and classify "Homologated car" section as
follows:
T1 – Homologated Cars
A specification table follows in the original; it is not shown here.
T1 C7 Corvette Rule Change Request
#34897 from Heath Karl · Rule change · TB 23-12 (2023-09 Fastrack)
In T1 Spec Lines, classify Chevrolet Corvette C7 (14 - 19) - Includes Z51, Grandsport as follows:
T1 – Homologated Cars
A specification table follows in the original; it is not shown here.
T1 Camaro Gen 5 Weight Reduction Due to Competitive Disadvantage
#35092 from Clark Nunes · Rule change · TB 23-12 (2023-09 Fastrack)
In T1 Spec Lines, Gen 5 Camaro, change as follows:
Spec Line 1130 - Minimum Weight "3550 3475"
Spec Line 1135 - Minimum Weight "3550 3475"
Restrictor Required "70mm 75mm-Flat Plate"
T1 Addendum to Letter #35022: Drivetrain Rule
#35105 from Clyde Greene · Rule change · TB 23-12 (2023-09 Fastrack)
In T1 Spec Lines, Aston Martin Vantage, add to Chassis Notes as follows:
"OEM Sportshift II transmission permitted."
T1 GT4 batch adjustment in T1
#35162 from Touring Committee · Rule change · TB 24-01 (2024-01 Fastrack)
In GCR, Section 9.1.9.1.A.T., change as follows:
"Tires- Tires must conform to GCR section 9.3.TIRES and als o must conform to spec line requirements. DOT approved tires are
permitted. Slicks conforming to the spec line are permitted."
In Touring 1 - Homologated Cars Spec Lines, 4100- BMW M2 ClubSport Racing, change Must Conform To as follows:
"Tires conforming to SRO TCX rules allowed. Must meet factory specs."
In Touring 1 - Homologated Cars Spec Lines, 4120- Ford Mustang FP350S 2017, change as follows:
Must Conform To: "Tires conforming to Trans Am SGT tire rules allowed Must meet factory specs."
Chassis Notes: "VIN not required. Additional permitted allowances: DOT tires required. Other consumables are open, alternate
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driveshaft permitted, aftermarket wheels and fuel cell per Touring category rules permitted. Shocks conforming to T1 rules
permitted. Alternative rear toe links permitted."
In T1-GT4 Spec Lines, change Chassis Notes as follows:
Aston Martin Vantage AMR GT4: "**NOT YET ELLIGIBLE FOR RUNOFFS COMPETITION (Q.2)** Slick tires conforming to IMSA GT4
or SRO GT4 specs are permitted."
Audi R8 GT4: "**NOT YET ELLIGIBLE FOR RUNOFFS COMPETITION (Q.2)**Slick tires conforming to IMSA GT4 or SRO GT4 specs
are permitted."
BMW M4 GT4: "**NOT YET ELLIGIBLE FOR RUNOFFS COMPETITION (Q.2)**Slick tires conforming to IMSA GT4 or SRO GT4 specs
are permitted."
Chevrolet Camaro GT4-R: "**NOT YET ELLIGIBLE FOR RUNOFFS COMPETITION (Q.2)**Slick tires conforming to IMSA GT4 or SRO
GT4 specs are permitted."
Ford Mustang GT4: "**NOT YET ELLIGIBLE FOR RUNOFFS COMPETITION (Q.2)**Slick tires conforming to IMSA GT4 or SRO GT4
specs are permitted."
Maclaren 570S GT4: "Slick tires conforming to IMSA GT4 or SRO GT4 specs are permitted."
Mercedes AMG GT4: "Slick tires conforming to IMSA GT4 or SRO GT4 specs are permitted."
Porsche 718 Cayman GT4 CS MR: "Slick tires conforming to IMSA GT4 or SRO GT4 specs are permitted."
Porsche 718 GT4 RS Club-sport: "Slick tires conforming to IMSA GT4 or SRO GT4 specs are permitted."
Toyota Supra GR GT4: "**NOT YET ELLIGIBLE FOR RUNOFFS COMPETITION (Q.2)**Slick tires conforming to IMSA GT4 or SRO GT4
specs are permitted."
In T1-GT4 Spec Lines, change as follows:
Aston Martin Vantage AMR GT4:
Weight: “3575 3490”
Performance Control: “SRO power level ECU Map 3 IMSA Map id 11”
Chevrolet Camaro GT4-R:
Weight: “3375 3435”
Performance Control: “63 62mm”
Ford Mustang GT4:
Weight: “3550 3535”
Performance Control: “63 71mm SRO compliant restrictor IMSA ECU Cal”
Maclaren 570S GT4:
Weight: “3450 3250”
Performance Control: “SRO 2019 BOP ECU map SRO Rest 1”
Mercedes AMG GT4:
Weight: “3450 3470”
Performance Control: “Power level 2 map 5”
Porsche 718 Cayman GT4 CS MR:
Weight: “3200 3250”
Performance Control: “54 53.7mm”
Toyota Supra GR GT4:
Weight: “3350 3315”
T1 Remove T1 spec lines
#35192 from Touring Committee · Rule change · TB 24-01 (2024-01 Fastrack)
In T1 Spec Lines, delete the following spec line numbers in their entirety:
A specification table follows in the original; it is not shown here.
T1 C8 Corvette T1 Restrictor Plate Request
#35213 from Garry Crook · Rule change · TB 24-02 (2024-02 Fastrack)
In T1 NEW Spec Lines, Chevrolet Corvette C8 (20- 23) - Includes Z51, #1210, change Required Restrictor as follows:
"70mm 72mm - Flat Plate"
T1 The Cars Have Expired
#35379 from Touring Committee · Rule change · TB 24-02 (2024-02 Fastrack)
In GCR Contents, change as follows:
"9.1.9.1 TOURING (T1) CATEGORY NEW
T1 NEW"
In GCR, Section 9.1.9.1.Touring (T1) NEW Category Specifications, change as follows:
"9.1.9.1.Touring (T1) NEW Category Specifications"
In T1 NEW Spec Lines, change as follows:
"9.1.9.1.A T1 NEW Spec Lines"
"T1 NEW"
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In T1 NEW Spec Lines, delete the following Spec Lines in their entirety:
"Acura NSX (Spec Line 1000)
Acura NSX Turbo (Spec Line 1010)
Acura NSX Turbo World Challenge (Spec Line 1020)
Audi TTRS (GTS 2011 Spec) (Spec Line 1040)
Dodge Viper ACR/ACR-X (Spec Line 1360)
Ferrari 360 (Spec Line 1400)
Ferrari 430 (Spec Line 1410)
Ferrari 430 Challenge (Spec Line 1420)
Mazda MX-5 (06-15) (Spec Line 1520 and 1530)
Mazda RX-7 (Spec Line 1540)
Nissan GTR (Spec Line 1550)
Nissan 350/370Z (Spec Line 1560)
Nissan 370Z Supercharged (Spec Line 1570)
Nissan 350Z (Spec Line 1580)
Nissan 350Z/370Z (Spec Line 1590)
Porsche Cayman/S/GTS (05-15) (Spec Line 1600, 1610 and 1620)
Porsche Cayman GTS (2011) (Spec Line 1630)
Porsche 928 S4 Porsche 928 GTS-R (Spec Line 1640)
Porsche 996 (Spec Line 1650)
Porsche 996 TT OEM (Spec Line 1660)
Subaru WRX, WRX STI (05-2020) (Spec Line 1700)
Toyota Celica All-Trac (Spec Line 1710)
Toyota Supra MK4 (Spec Line 1720)"
In T1 NEW Spec Lines, Porsche 997, change Spec Line Number as follows:
"1680 *Spec line Expires 12/23*"
T1 9.1.9.1 T1 new category item/ line 26 rule to expire Jan 1 2023
#35411 from Geoffrey Hegel · Rule change · TB 24-03 (2024-03 Fastrack)
In T1 Spec Lines, classify Pontiac GTO 2006-2009 as Spec Line Number 1590 as follows:
A specification table follows in the original; it is not shown here.
T1 Honda S2000
#35582 from Touring Committee · Rule change · TB 24-04 (2024-04 Fastrack)
In T1 Spec Lines, classify Honda S2000 as follows:
A specification table follows in the original; it is not shown here.
T1 Please Expedite classing the C63 Mercedes
#35987 from Touring Committee · Rule change · TB 24-05 (2024-05 Fastrack)
In T1 Spec Lines, classify Mercedes AMG-C63 S (2023) as follows:
A specification table follows in the original; it is not shown here.
T1 Changes to T1 Tires for GT4 and Other Cars
#35383 from Andrew Aquilante · Rule change · TB 24-12 (2024-12 Fastrack)
In T1 GT4 Spec Lines, change Tire Size as follows:
Aston Martin Vantage AMR GT4 4010: "315 DOT, 305/660 Non-DOT"
Audi R8 GT4 - Spec Line #4020: "315 DOT, 305/645 Non-DOT"
BMW M4 GT4 - Spec Line #4030: "315 DOT, 305/660 Non-DOT"
Chevrolet Camaro GT4-R- Spec Line #4035: "315 DOT, 305/680 Non-DOT"
Ford Mustang GT4 - Spec Line #4040: "315 DOT, 315/680 Non-DOT"
Mclaren 570S GT4 - Spec Line #4050: "315 DOT, 305/645 Non-DOT"
Mercedes AMG GT4 - Spec Line #4060: "315 DOT, 305/660 Non-DOT"
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Porsche 718 Cayman GT4 CS MR - Spec Line #4070: "315 DOT, 305/660 Non-DOT"
Porsche 718 GT4 RS Clubsport - Spec Line #4080: "315 DOT, 305/660 Non-DOT"
Toyota Supra GR GT4 - Spec Line #4090: "315 DOT, 305/660 Non-DOT"
T1 G82 M4 GT4 inclusion in T1
#35864 from Denny Stripling · Rule change · TB 24-12 (2024-12 Fastrack)
In T1 GT4 Spec Lines, SL#4030, change as follows:
Model: "BMW M4 GT4 (F82)"
Performance Control: "Gold power stick Red power stick"
In T1 GT4 Spec Lines, classify BMW M4 GT4 (G82) as follows:
A specification table follows in the original; it is not shown here.
T1 Alt. Clutch Allowance
#36606 from Hugh Stewart · Rule change · TB 24-12 (2024-12 Fastrack)
In T1 Spec Lines, SL# 1050, change add to Engine Notes the following:
"5.5 inch clutch permitted."
T1 BOP Changes Need Updates
#36667 from Joe Rainey · Rule change · TB 24-12 (2024-12 Fastrack)
In T1 GT4 Spec Lines, Spec Line 4020, change as follows:
Performance Control: Power level 2020, 44mm 45mm SRO compliant restrictor"
Min. Weight with driver (LBS): "3550 3400"
T1 Request Ford Performance Darkhorse R in T1
#37136 from Christopher Childs · Rule change · TB 24-12 (2024-12 Fastrack)
In T1-Homologated Cars Spec Line, classify Mustang Darkhorse R (Mustang Challenge) as follows:
T1 – Homologated Cars
A specification table follows in the original; it is not shown here.
T1 Car Mods for T1 Corvette under line item 1150
#37173 from Thomas Napolitano · Rule change · TB 24-12 (2024-12 Fastrack)
In GCR, Section 9.1.9.1.A.2,, add the following:
"It is permitted to roll under or flatten any interior lip on the wheel opening for tire clearance. Cars with plastic/composite
fenders may remove any interior wheel opening lip, but the resulting material edge shall be no thinner than the basic fender
material thickness. Non-metallic inner fender liners may be removed. Vents may be added to fenders."
T1 Increased Bore Throttle Bodies for E46 M3 S54 Engine
#37273 from Mark Pfeffer · Rule change · TB 24-12 (2024-12 Fastrack)
In T1 Spec Lines, E46 M3 Spec Line # 1050, add to Engine Notes the following:
"Dinan Throttle Body #D760-3400 allowed on the 3.250L."
T1 T1 Parity Compared to GT4
#37170 from Tony Ave · Rule change · TB 25-02 (2025-02 Fastrack)
In T1 Spec Lines, change Weight and Restrictor Required as follows:
Mustang - Spec Line 1430
Weight: "3475 3600"
Restrictor Required: "65mm 60mm - FPR"
Corvette Spec Line 1190
Weight: "3450 3500"
Restrictor Required: "70mm 67mm - Flat Plate"
In T1 Spec Lines, delete Spec Line BMW # 1190 in its entirety.
T1 Clarification of Request Approval #37273
#37399 from Mark Pfeffer · Rule change · TB 25-02 (2025-02 Fastrack)
In T1 Spec Lines, E46 M3 Spec Line # 1050, change Engine Notes as follows:
"Dinan Throttle Body #D760-3400 VAC Motorsports #VAC-TB-S54 allowed on the 3.250L."
T1 C8 Corvette Facts
#37400 from Garry Crook · Rule change · TB 25-02 (2025-02 Fastrack)
In T1 Spec Lines, Chevrolet Corvette C8 (20- 23) - Includes Z51, Spec Line # 1210, change Min. Weight as follows:
"3600 3500"
T1 Camaro Gen 5 Competitive Disadvantage
#37440 from Clark Nunes · Rule change · TB 25-02 (2025-02 Fastrack)
In T1 Spec Lines, Chevrolet Camaro Gen 5 (10-15) Including SS, Z28 Spec Line 1135, change Required Restrictor as follows:"75mm 80mm - Flat Plate"
T1 Tire Changes in the Rules for GT4
#37497 from Joe Rainey · Rule change · TB 25-02 (2025-02 Fastrack)
In T1-GT4 Spec Lines, Audi R8 GT4 Spec Line #4020, change Max Tire Size as follows:
"315 DOT, 305/645, or 30/65-18 (f), 33/68-18 (r) Non-DOT"
T1 Correct and make new T1 BOP adjustments.
#37737 from Touring Committee · Rule change · TB 25-03 (2025-03 Fastrack)
In T1 Spec Lines, change Weight, Restrictor Required and/or Notes as follows:
Mustang - Spec Line 1430:
Restrictor Required: "60mm 65mm - FPR"
Mustang - Spec Line 1460:
Weight: "3425 3500"
Restrictor Required: "70mm - FPR"
Corvette Spec Line 1190:
Restrictor Required: "67mm 70mm - Flat Plate"
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BMW - Spec Line 1090:
Required Restrictor: "(2) X 40mm 35mm diameter hole inlet restrictor plate required"
Chassis Notes: "This spec line is set to expire 12/31/25."
BMW - Spec Line 1100:
Minimum Weight: "3150 3350”
T1 Cadillac CT4-V Blackwing
#38003 from Touring Committee · Rule change · TB 25-04 (2025-04 Fastrack)
In T1 Spec Lines, classify Cadillac CT4-V Blackwing as follows:
A specification table follows in the original; it is not shown here.
T1 Acceptance of Porsche 981 GT4 Clubsport into T1
#36664 from John Brown · Rule change · TB 25-05 (2025-05 Fastrack)
In T1-GT4 Spec Lines, classify Porsche 981 GT4 Clubsport as follows:
A specification table follows in the original; it is not shown here.
T1 Request to Restore T1 Honda S2000 to Proper Weights
#37644 from David Mead · Rule change · TB 25-05 (2025-05 Fastrack)
In T1 Spec Lines, Honda S2000, Spec Line 1530, change as follows:
Minimum Weight: "2950 2900"
Chassis Notes: "This spec line is set to expire as of 12/31/2025 if not represented in Majors competition in 2025."
T1 DCT Transmission in E46
#37964 from Matt Spicuzzi · Rule change · TB 25-05 (2025-05 Fastrack)
In T1 Spec Lines, BMW E46 M3, add to Chassis Notes the following:
SL# 1060: "BMW #GS7D36SG transmission permitted as an aftermarket sequential option."
SL# 1070: "BMW #GS7D36SG transmission permitted as an aftermarket sequential option."
Applies to BMW M3 on this page: Brian Goodman
T1 Reduce E92 M3 Minimum Weight to 3050
#38092 from Shane Brown · Rule change · TB 25-05 (2025-05 Fastrack)
In T1 Spec Lines, BMW M3 E92 (08-13), Spec Line 1100, change Min. Weight as follows:"3350 3300"
T1 Finalize Spec Line for T1 Darkhorse
#38106 from Touring Committee · Rule change · TB 25-05 (2025-05 Fastrack)
In T1 Spec Lines, Mustang Darkhorse R (Mustang Challenge) Spec Line- 4119, change as follows:
Tire size: "305 315 (f) 315(r)"
Performance Control: "TBD"
Min. Weight with driver (LBS): "10.5 (f) 11 (r) 3600"
Chassis Notes: "Must conform to Mustang Challenge Rules. Tires conforming to Mustang Challenge rules are permitted. **This
car is not eligible for the Runoffs until it has competed in 3 Super Tour events.**"
T1 Keep S2000 Classification
#39344 from David Mead · Rule change · TB 25-12 (2025-12 Fastrack)
In T1 Spec Lines, Honda S2000, change as follows:
T1 Correcting and updating T1 GT4 spec lines
#39394 from Touring Committee · Rule change · TB 25-12 (2025-12 Fastrack)
In T1-GT4 Spec Lines, change as follows:
A specification table follows in the original; it is not shown here.
T1 BOP adjustments to non GT4 T1 cars
#39406 from Touring Committee · Rule change · TB 25-12 (2025-12 Fastrack)
In T1 Spec Lines, change as follows:
Spec Line # 1134
Required Restrictor: "61mm 70mm - Flat Plate"
Spec Line # 1140
Required Restrictor: "72mm - Flat Plate"
Spec Line # "1175"
Maximum Displ.: "L76 5967cc OEM"
Minimum Weight: "3250"
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Required Restrictor: "80mm"
Engine Notes: "An L76 is an LS2 block with LS3 intake manifold and heads. All parts must be OEM. May resleeve to stock
parameters for engine repair."
Spec Line # 1180
Required Restrictor: "75mm 78mm - Flat Plate"
Spec Line # 1190
Required Restrictor: "70mm 73mm - Flat Plate"
Spec Line # 1200
Required Restrictor: "72mm 78mm - Flat Plate"
Spec Line # 1201
Required Restrictor: "70mm 73mm - Flat Plate"
Spec Line # 1210
Required Restrictor: "72mm - Flat Plate"
Spec Line # 1350
Required Restrictor: "(2) 55mm 60mm flat plate"
Spec Line # 1370
Required Restrictor: "(2) 55mm 60mm flat plate"
Spec Line # 1390
Required Restrictor: "(2) 55mm 60mm flat plate"
Spec Line # 1420 "*Spec line Expires 12/23"
Required Restrictor: "52mm FPR"
Spec Line # 1429
Required Restrictor: "75mm - FPR"
Spec Line # 1460
Weight: "3500 3600"
Required Restrictor: "70mm - FPR"
Spec Line # 1480
Required Restrictor: "80mm FPR"
Spec Line # 1490
Required Restrictor: "75mm - FPR"
Spec Line # 1590
Engine Notes: "90mm Throttle Body Permitted"
Spec Line # 1595
Required Restrictor: "72mm – FPR"
Spec Line # 1596
Required Restrictor: "61mm 70mm – FPR"
Spec Line # 4120
Required Restrictor: "75mm flat plate"
T1 Remove T1 Spec Line
#39407 from Touring Committee · Rule change · TB 25-12 (2025-12 Fastrack)
In T1 Spec Lines, BMW M3 E92 (08-13) Spec Line number 1090, delete Spec Line in its entirety.
T1 additional T1 adjustment
#39520 from Touring Committee · Rule change · TB 26-01 (2026-01 Fastrack)
In T1 Spec Line, Spec line # 1132, change Restrictor as follows:
"70mm - Flat Plate"
T1 LS1 into Corvette C6 Spec Line Request
#39716 from Danny Kellermeyerhttps://crbscca.com/secu · Rule change · TB 26-02 (2026-02 Fastrack)
In T1 Spec Lines, reinstate Spec Line # 1139, Chevrolet Corvette C6 (05-13) Includes Z51, GrandSport, Z06, Z06 Carbon, as
follows:
Max Displ: "LS1, LS6 OEM"
Min Weight: "3200"
Required Restrictor: "70mm"
T1 Replace OEM Heat Exchanger (Intercooler) With Aftermarket
#39542 from Roy Lipner · Rule change · TB 26-03 (2026-03 Fastrack)
In T1 GT4 Spec Lines, Spec Line 4030-, add to Chassis Notes the following:
"Wagner Tuning # 200001124 Intercooler allowed."
T1 Spec line #1139 Restrictor Change Request
#39922 from Danny Kellermeyer · Rule change · TB 26-04 (2026-04 Fastrack)
In T1 Spec Lines, Spec line 1139, change Required Restrictor as follows:
"70mm"
T1 Clarification on Request #39716 T1 (Spec Line #1139)
#39924 from Danny Kellermeyer · Rule change · TB 26-05 (2026-05 Fastrack)
In T1 Spec Lines # 1139, change as follows:
Max Displ: "LS1, LS6 OEM
Restrictor Required: "70mm"
T1 Mistake in Line 1430
#39958 from Joe Aquilante · Rule change · TB 26-05 (2026-05 Fastrack)
In T1 Spec Line, Spec Lines # 1430, change Maximum Displ as follows:
"Coyote, Boss 302 (11-17 14) 4957"
What the rules allowed changed as listed; this does not say what any particular car ran.