SCCA® Solo classing — unofficial guide
What autocross class is a Porsche 718 Boxster & Cayman (base/T/S/GTS)?
A stock 2017–2025 Porsche 718 Boxster & Cayman (base/T/S/GTS) 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: '718 Boxster (base, T, S, GTS) (2017-25)' / '718 Cayman (base, T, S, GTS) (2017-25)' = AS. ST: '718 base & T (2017-22)' and 'S & GTS (excl 4.0L) (2017-2024)' = SST. GTS 4.0/Spyder/GT4 = SS.
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.