Jack Roush's Own Stage 3 Mustang

Roush is one of the biggest players in the Mustang tuning game. This is the car that the founder and chief executive built for himself.

Roush Performance has built quite the reputation as the premier Mustangs tuner. But what does founder Jack Roush himself drive? You're looking at it. Styled after Jack's original '69 Boss 429 and a P-51 Mustang (both of which it is photographed with here), the Stage 3 kit supercharges the pony car's output up from a respectable 420 horsepower to a monstrous 624. Jack had just about every piece in his company's catalog fitted, so what you see here represents the pinnacle of his work.

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