SCCA® Solo classing — unofficial guide
What autocross class is a Audi TTS (Mk2)?
DSStreetBSTStreet Touring
A stock 2009–2015 Audi TTS (Mk2) 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
XA/XBXtreme Street
From the 2026 rulebook (Appendix A)
Street: 'TTS (2009-15)' = DS; 'TTS (2016-20)' = BS. ST: 'TTS quattro (2008-15)' = 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.