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.
From the 2026 rulebook (Appendix A)
Street: 'STI Type RA (2018)' = BS; standard STI = DS.
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.