WhatClassAmIAutocross Classing Guide

SCCA® Solo classing — unofficial guide

What autocross class is a BMW Z3 (4-cyl)?

ESStreetESTStreet Touring

A stock 1996–1998 BMW Z3 (4-cyl) runs in ES (Street) under the 2026 SCCA Solo Rules. Built to Street Touring allowances (within EST tire and wheel limits), it runs EST.

From the 2026 rulebook (Appendix A)

Street: 'Z3 (4-cyl) (1996-98)' = ES. ST: 'Z3 (4-cyl)' = EST.

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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.