SCCA® Solo classing — unofficial guide
What autocross class is a BMW 4 Series (F32/F33/F36, 4-cyl turbo)?
DSStreetBSTStreet Touring
A stock 2014–2020 BMW 4 Series (F32/F33/F36, 4-cyl turbo) runs in DS (Street) under the 2026 SCCA Solo Rules. Built to Street Touring allowances (within BST tire and wheel limits), it runs BST.
Class by preparation level
| Stock (Street) | DS |
| Street Touring | BST |
| Street Prepared | — |
| Street Modified | SM |
| Prepared | — |
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 Street
From the 2026 rulebook (Appendix A)
Street: '4 Series (428i, 430i) (4-cyl Turbo; F32/F33/F36) (2014-20)' = DS. ST: '4 Series (Non-M) (2014-26)' = BST.
Other DS 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.