SCCA® Solo classing — unofficial guide
What autocross class is a Porsche 924 Turbo?
ESStreet
A stock 1979–1981 Porsche 924 Turbo runs in ES (Street) under the 2026 SCCA Solo Rules.
From the 2026 rulebook (Appendix A)
Street: '924 Turbo (Audi engine) (1979-81)' = ES. No ST listing found for the turbo.
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.