SCCA® Solo classing — unofficial guide
What autocross class is a Porsche 718 Cayman GTS 4.0 & GT4?
SSStreet
A stock 2017–2025 Porsche 718 Cayman GTS 4.0 & GT4 runs in SS (Street) under the 2026 SCCA Solo Rules.
From the 2026 rulebook (Appendix A)
Street: '718 Cayman (GTS 4.0, GT4) (2017-25)' = SS; 'GT4 RS (2022-25)' also SS.
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.