SCCA® Solo classing — unofficial guide
What autocross class is a Porsche Boxster & Cayman S/GTS (981)?
ASStreetSSTStreet Touring
A stock 2013–2016 Porsche Boxster & Cayman S/GTS (981) runs in AS (Street) under the 2026 SCCA Solo Rules. Built to Street Touring allowances (within SST tire and wheel limits), it runs SST.
Class by preparation level
| Stock (Street) | AS |
| Street Touring | SST |
| 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: 'Boxster (981 S, GTS) (2013-16)' / 'Cayman (981 S, GTS) (2013-16)' = AS. ST: 'Boxster S/GTS, Cayman S/GTS (981) (2013-16)' = SST.
Other AS 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.