WhatClassAmIAutocross Classing Guide

SCCA® Solo classing — unofficial guide

What autocross class is a Mazda Mazdaspeed3?

HSStreetGSTStreet Touring

A stock 2007–2013 Mazda Mazdaspeed3 runs in HS (Street) under the 2026 SCCA Solo Rules. Built to Street Touring allowances (within GST tire and wheel limits), it runs GST.

From the 2026 rulebook (Appendix A)

Street: HS (listed under Mazda in H Street). ST: 'Mazdaspeed3' = GST.

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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.