WhatClassAmIAutocross Classing Guide

SCCA® Solo classing — unofficial guide

What autocross class is a Porsche Cayman (987.1 base)?

CSStreetBSTStreet Touring

A stock 2007–2008 Porsche Cayman (987.1 base) runs in CS (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: 'Cayman (987.1 Base) (2007-08)' = CS. ST: 'Cayman (987.1; base model) (2007-08)' = 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.