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Prices shown are the prices you can expect to pay for a 2017 Roush Performance Stage 1 Mustang 2 Door Convertible across different levels of condition. Edit options.

Roush’s new supercharger kit will add up to 330 horsepower and 195 pound-feet of torque. Roush Performance has been upgrading Mustangs and selling parts for the pony car for nearly three decades.