SCCA® Solo classing — unofficial guide
What autocross class is a Ford Mustang Shelby GT350?
A stock 2015–2020 Ford Mustang Shelby GT350 runs in FS (Street) under the 2026 SCCA Solo Rules. Built to Street Touring allowances (within SST tire and wheel limits), it runs SST.
Class by preparation level
| Stock (Street) | FS |
| Street Touring | SST |
| Street Prepared | ESP |
| 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
From the 2026 rulebook (Appendix A)
Street: 'Mustang Shelby GT350 (incl. Handling Package) (2015-20)' = FS. ST: 'Mustang Shelby GT350 (2015-18)' / '(incl. Handling Package) (2019-20)' = SST. GT350R excluded from Street. SP: 'Mustang Shelby GT350/GT350R (S550) (2015-2020) Limited Prep' = ESP.
Other FS 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.