SCCA® Solo classing — unofficial guide
What autocross class is a Mazda Mazda3 Turbo?
GSStreetGSTStreet Touring
A stock 2021–2026 Mazda Mazda3 Turbo runs in GS (Street) under the 2026 SCCA Solo Rules. Built to Street Touring allowances (within GST tire and wheel limits), it runs GST.
From the 2026 rulebook (Appendix A)
Street: 'Mazda3 Turbo (2021-26)' = GS. ST: 'Mazda3 Turbo (2021-2026)' = GST.
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.