SCCA® Solo classing — unofficial guide
What autocross class is a Porsche 944 S/S2 (16v)?
CSStreetCSTStreet Touring
A stock 1987–1991 Porsche 944 S/S2 (16v) runs in CS (Street) under the 2026 SCCA Solo Rules. Built to Street Touring allowances (within CST tire and wheel limits), it runs CST.
Class by preparation level
| Stock (Street) | CS |
| Street Touring | CST |
| Street Prepared | — |
| Street Modified | SSM |
| Prepared | — |
A “—” means the car isn’t listed at that level; a build lands in the least-prepared category its modifications allow.
From the 2026 rulebook (Appendix A)
Street: '944 (16v)' = CS (years approximate; listing has none). ST: '944 (non-turbo)' = CST. 8v = ES.
Other CS cars
Unofficial guidance verified against the 2026 SCCA® Solo® Rules — always confirm against the current rulebook before competing. Classing data cites the exact Appendix A wording it relies on. Spot an error? Report it on GitHub.