SCCA® Solo classing — unofficial guide
What autocross class is a Cadillac ATS (2.0L Turbo)?
DSStreetBSTStreet Touring
A stock 2013–2019 Cadillac ATS (2.0L Turbo) runs in DS (Street) under the 2026 SCCA Solo Rules. Built to Street Touring allowances (within BST tire and wheel limits), it runs BST.
Class by preparation level
| Stock (Street) | DS |
| Street Touring | BST |
| 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
CAM-CClassic American Muscle
From the 2026 rulebook (Appendix A)
Street: 'ATS (2.0L Turbo) (2013-19)' = DS. ST: 'ATS (2.0L) (2012-19)' = BST.
Other DS 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.