SCCA® Solo classing — unofficial guide
What autocross class is a BMW M3 CS & M4 CS (F80/F82)?
ASStreet
A stock 2018–2020 BMW M3 CS & M4 CS (F80/F82) runs in AS (Street) under the 2026 SCCA Solo Rules.
Class by preparation level
| Stock (Street) | AS |
| Street Touring | — |
| 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: 'M3 CS & M4 CS (2018-20)' = AS. The SST F8x listing is non-CS only.
Other AS 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.