SCCA® Solo classing — unofficial guide
What autocross class is a BMW Z4 28i & 30i (E89)?
CSStreet
A stock 2009–2016 BMW Z4 28i & 30i (E89) runs in CS (Street) under the 2026 SCCA Solo Rules.
From the 2026 rulebook (Appendix A)
Street: 'Z4 28i & 30i (2009-16)' = CS. Turbo — not covered by the CST 'Z4 (non-turbo, non-M)' listing; 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.