SCCA® Solo classing — unofficial guide
What autocross class is a GMC Syclone & Typhoon?
FSStreet
A stock 1991–1993 GMC Syclone & Typhoon runs in FS (Street) under the 2026 SCCA Solo Rules.
From the 2026 rulebook (Appendix A)
Street: 'Syclone' / 'Typhoon' = FS (years approximate; listing has none).
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.