SCCA® Solo classing — unofficial guide
What autocross class is a Subaru WRX STI Type RA?
BSStreet
A stock 2018–2018 Subaru WRX STI Type RA runs in BS (Street) under the 2026 SCCA Solo Rules.
Class by preparation level
| Stock (Street) | BS |
| 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: 'STI Type RA (2018)' = BS; standard STI = DS.
Other BS 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.