Spec Corvette Rules Outdated
#40630 from Jim Tway · Recommended to the Board · Minutes (2026-09 Fastrack)
In T2 Spec Lines, Spec Corvette, change as follows:
Weight: "SC-3200
SC+-3300 See notes section"
Notes:
"Cars must conform to Spec Corvette rules dated 11/2022 10/17/2024. Master cylinder part number GM 19418187 and Booster
part number 19418516 permitted. Limited to 380 HP. Any 200tw 315 tire permitted if used on all 4 corners or a 295 R compound
DOT tire. Modifications to Radiator Air Shroud to increase radiator cooling efficiency is allowed. Replacement of factory air
shroud with other material is allowed. New air shroud cannot be wider than inside of frame rails. The front bumper must remain
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in factory shape – unmolested and air shroud must mount to it in factory location. Upper Radiator Support must retain factory
location. Factory air dam must remain in its factory location. All factory suspension pick up points must be maintained.
Trackspec’s rear upper coilover offset shock mount may be used, part number C56UPRMN
The following “Spec Corvette +” allowances are permitted with a base weight of 3300 lbs:
1) Penske double adjustable shock
2) dry sump,
3) battery relocation,
4) Quaife limited slip differential,
5) T2 4 piston 13” front brake system,
6) coil springs other than Eibach part number 0800.225.0550.
7) up to 7100 rpm Rev limit"