SCCA® Solo classing — unofficial guide
What autocross class is a BMW Z3 (4-cyl)?
ESStreetESTStreet TouringDPPrepared
A stock 1996–1998 BMW Z3 (4-cyl) runs in ES (Street) under the 2026 SCCA Solo Rules. Built to Street Touring allowances (within EST tire and wheel limits), it runs EST.
Class by preparation level
| Stock (Street) | ES |
| Street Touring | EST |
| Street Prepared | — |
| Street Modified | SSM |
| Prepared | DP |
A “—” means the car isn’t listed at that level; a build lands in the least-prepared category its modifications allow.
Also eligible for
XA/XBXtreme StreetXPX Prepared (open)
From the 2026 rulebook (Appendix A)
Street: 'Z3 (4-cyl) (1996-98)' = ES. ST: 'Z3 (4-cyl)' = EST. P: 'Z3 (4-cyl)' = DP.
Other ES cars
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. Spot an error? Report it on GitHub.