SCCA® Solo classing — unofficial guide
What autocross class is a BMW Z3 (6-cyl, non-M)?
CSStreetCSTStreet Touring
A stock 1997–2002 BMW Z3 (6-cyl, non-M) runs in CS (Street) under the 2026 SCCA Solo Rules. Built to Street Touring allowances (within CST tire and wheel limits), it runs CST.
From the 2026 rulebook (Appendix A)
Street: 'Z3 (6-cyl, non-M) (1997-2002)' = CS. ST: 'Z3 (6-cyl)' = CST. 4-cyl = ES/EST.
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.