SCCA® Solo classing — unofficial guide
What autocross class is a Porsche 911 (air-cooled, NOC)?
CSStreetCSTStreet Touring
A stock 1965–1994 Porsche 911 (air-cooled, NOC) 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: '911 (NOC)' = CS (years approximate). ST: '911 Carrera (3.2L) (1984-89)' / '911 SC (3.0L) (1978-83)' = CST.
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.