Roush Performance offers four aftermarket packages for Ford Mustangs with an average price of about $14,000 above vehicle base price as of 2015. Customization package prices range from $5,995 for the basic Roush RS Mustang to more than $22,590 for the Roush Stage 3 Mustang.
Roush’s basic RS Mustang package adds numerous body parts such as hood and body side scoops, a rear deck spoiler and a front fascia with aero pockets. It also includes badging, performance lamps, an instrument cluster and floor mats. Stage 1 adds the Roush exhaust system with quad tips. Stage 2 builds on Stage 1 by adding 20-inch wheels. Roush Stage 3 Mustangs have all the body and interior add-ons, as well as a few others. The highlight of Stage 3 Mustangs is the 5.0-liter ROUSHcharged 670-horsepower powertrain with the ROUSH 2.3-liter TVS supercharger.