SCCA® Solo classing — unofficial guide
What autocross class is a Alfa Romeo Giulia Quadrifoglio?
BSStreetSSTStreet Touring
A stock 2017–2024 Alfa Romeo Giulia Quadrifoglio runs in BS (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) | BS |
| Street Touring | SST |
| 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: 'Giulia Quadrifoglio (2017-24)' = BS. ST: 'Giulia Quadrifoglio (2017-25)' = SST.
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.