WhatClassAmIAutocross Classing Guide

SCCA® Solo classing — unofficial guide

What autocross class is a Honda Civic Si Mugen?

GSStreetDSTStreet Touring

A stock 2008–2008 Honda Civic Si Mugen runs in GS (Street) under the 2026 SCCA Solo Rules. Built to Street Touring allowances (within DST tire and wheel limits), it runs DST.

From the 2026 rulebook (Appendix A)

Street: 'Civic Si Mugen (2008)' = GS (excluded from the HS 'Civic (all)' listing). ST: 'Civic Si (2002-15)' = DST.

Check this car with your mods →Browse all cars

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.