Regional Classes

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.

Complete List of SFR Region Indexed Classes

SFR Class

Index Classes

AS

DS

SSC

SST

STR

STU

STX

S1-

SS, SSR

S2-

BS, FS

S3-

CS, ES

S4-

GS, HS

ST2-

STH, STS

SMP-

ASP, BSP, BSPV, CSP, DSP, ESP, FSP, OSP, SSP, SM, SMF, SSM

STM-

Same as SMP but with 200+ TW tires

M-

AM, BM, CM, DM, EM, FM

P-

BP, CP, DP, EP, FP, XP

CAM-

CAMC, CAMS, CAMT

XS-

XSA, XSB, XSS, EV


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.

XS – Indexed

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