Currently atop the '10 Roush food chain, the 427R package ($14,156 on top of the Mustang GT price) is distinguished from its Stage 1 and 2 brethren in part by this trunk-lid badging. The $5,952 Stage 1 package is all about looks. It includes the bodywork, badging, and 18-inch chrome wheels, while the $7,326 Stage II package adds performance zest courtesy of the Roush suspension system. Naturally, you can option up all the Roush variants with myriad appearance and performance parts. Our well-optioned 427 tester stickered at $55,538.