List of Car Classes

For specific classing, please consult the SCCA Solo rulebook. In addition to the normal classes, the local SFR region offers some local-only classes. You’ll notice a lot of “indexed” classes, which were created to have a more competitive environment. Rather than have lower-attended classes, it creates a large field of people to compete against each other.

Street Category

Class Name

Abbreviation

Index Classes

Notes

A Street

AS

A Street Ladies

ASL


D Street

DS

D Street Ladies

DSL


Street 1

S1

SS, SSR

Street 1 Ladies

S1L

SS, SSR

Street 2

S2

BS, FS

Street 2 Ladies

S2L

BS, FS

Street 3

S3

CS, ES

Street 3 Ladies

S3L

CS, ES

Street 4

S4

GS, HS

Street 4 Ladies

S4L

GS, HS

Street Touring Category

A Street Touring (AST) is the newest Street Touring class for 2025. If you previously ran an ND Miata in STR (now called CST), you now run in AST.

Class Name

Abbreviation

Index Classes

Notes

Super Street Touring

SST

Super Street Touring Ladies

SSTL

A Street Touring

AST

A Street Touring Ladies

ASTL

B Street Touring

BST

Formerly STU

B Street Touring Ladies

BSTL

Formerly STUL

C Street Touring

CST

Formerly STR

C Street Touring Ladies

CSTL

Formerly STRL

D Street Touring

DST

Formerly STX

D Street Touring Ladies

DSTL

Formerly STXL

Street Touring 2

ST2

EST, GST

Formerly STS, STH

Street Touring 2 Ladies

ST2L

EST, GST

Formerly STS, STH

Classic American Muscle (CAM) Category

Class Name

Abbreviation

Index Classes

Notes

CAM

CAM

CAM-C, CAM-S, CAM-T

CAM Ladies

CAML

CAM-C, CAM-S, CAM-T

Xtreme Street Category

Class Name

Abbreviation

Index Classes

Notes

Xtreme Street

XS

XA, XB, XU, EVX

Spec Combined Category

This is a combined class for Solo Spec Coupe (SSC), Club Spec Mustang (CSM), and Club Spec MX-5 (CSX).

Class Name

Abbreviation

Index Classes

Notes

Spec Combined

SC

SSC, CSM, CSX

Spec Combined Ladies

SCL

SSC, CSM, CSX

Street Modified / Street Prepared (SM/SP) Category

Class Name

Abbreviation

Index Classes

Notes

Street Modified / Street Prepared

SMP

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

Street Modified / Street Prepared Ladies

SMPL

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

Prepared Category

Class Name

Abbreviation

Index Classes

Notes

Prepared

P

BP*, CP, DP, EP, FP, XP

Prepared Ladies

PL

BP*, CP, DP, EP, FP, XP

Modified Category

Class Name

Abbreviation

Index Classes

Notes

Modified

M

AM, BM, CM, DM, EM, FM, KM, FSAE

Modified Ladies

ML

AM, BM, CM, DM, EM, FM, KM, FSAE

Novice

All novices are required to select an index class from any of the above categories. If an index class is not selected during pre-registration, one will be assigned to you when the run groups are finalized.

Please note that Novice Street will not appear under the Class dropdown menu on the registration page. After registration closes and the run groups are finalized, you will be assigned to NS if you are driving a car that would normally be classed in SMP, P, or M categories.

Class Name

Abbreviation

Index Classes

Notes

Novice

N

Novice Street

NS

Same as N, but for SMP, M, and P vehicles

*SFR-exclusive class, not nationally recognized. For more information, please visit this page.