In addition to the normal classes, the local SFR region offers some local-only classes. You’ll notice a lot of “indexed” classes. We have these to create a more competitive environment. Rather than have lower-attended classes, it creates a large field of people to compete against each other.

CAM – Classic American Muscle Indexed Class
The CAM- indexed class contains: CAM-C, CAM-S, and CAM-T.

OSP – Open Street Prepared
This is a catch-all style class. There are only two real rules: car must’ve been registered for legal road use at some point, and the tires must be D.O.T. legal. For more specifics, please see the Supplemental Regulations.

P- Prepared Indexed Class
The P- class is an indexed class that groups together the classes: BP, CP, DP, EP, FP, XP.

SM – Street Modified Indexed Class
The SM- class is an indexed class that groups together the classes: Street Modified (SM), Street Modified FWD (SMF), and Super Street Modified (SSM).

SP – Street Prepared Indexed Class
The SP- class groups together the classes: ASP, BSP, CSP, DSP, ESP, FSP, OSP.

STM – Street Tire Modified Class
The STM class is an index class designed for Street Prepared and Street Modified type cars who want to run on street tires with 200+ treadwear. For more specifics, please see the Supplemental Regulations.

X – Indexed
The ultimate competition class, indexed. All cars can run here in their full prep and compete for the best indexed time.