WhatClassAmIAutocross Classing Guide

SCCA® Solo classing — unofficial guide

What autocross class is a Subaru STI (excl. S209)?

DSStreetBSTStreet Touring

A stock 2019–2021 Subaru STI (excl. S209) runs in DS (Street) under the 2026 SCCA Solo Rules. Built to Street Touring allowances (within BST tire and wheel limits), it runs BST.

From the 2026 rulebook (Appendix A)

Street: 'STI (excl. S209) (2019-21)' = DS. ST: 'Impreza WRX STI' = BST.

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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.