WhatClassAmIAutocross Classing Guide

SCCA® Solo classing — unofficial guide

What autocross class is a Porsche 911 (air-cooled, NOC)?

CSStreetCSTStreet Touring

A stock 1965–1994 Porsche 911 (air-cooled, NOC) runs in CS (Street) under the 2026 SCCA Solo Rules. Built to Street Touring allowances (within CST tire and wheel limits), it runs CST.

From the 2026 rulebook (Appendix A)

Street: '911 (NOC)' = CS (years approximate). ST: '911 Carrera (3.2L) (1984-89)' / '911 SC (3.0L) (1978-83)' = CST.

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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.