WhatClassAmIAutocross Classing Guide

SCCA® Solo classing — unofficial guide

What autocross class is a Porsche 924S?

ESStreetCSTStreet Touring

A stock 1986–1988 Porsche 924S runs in ES (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: '924S (1986-88)' = ES. ST: '924' = 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.