SCCA® Solo classing — unofficial guide
What autocross class is a BMW Z4 sDrive30i (G29, 4-cyl)?
CSStreet
A stock 2020–2026 BMW Z4 sDrive30i (G29, 4-cyl) runs in CS (Street) under the 2026 SCCA Solo Rules.
From the 2026 rulebook (Appendix A)
Street: 'Z4 4 cyl (2020-26)' = CS; 6-cyl = BS ('Z4 6 cyl (2020-26)'). No ST listing found.
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.