1. To be eligible for the Club Spec Mustang Category:

A. Vehicle must be a 2005-2009 Ford Mustang GT Coupe, Convertible (S197 Chassis), including the California Special, Shelby GT* and Bullitt* models

*Must use engine and rear gear ratio listed below and either complete OE suspension or Performance Kit suspension

2. Vehicle Requirements

A. Engine: 4.6L, 3 Valve V8

B. Rear Axle Assembly Gear Ratio: 3.55:1