As with previous generations of the Mustang, the 6th Gen Ford Mustang was commonly modified by notable Ford tuner Roush Performance. The majority of these cars were based on the 6th Gen Mustang GT. Roush continued the Sport, Stage 1, Stage 2, and Stage 3 editions from the previous generation Mustang. The Sport edition featured an exterior appearance package, Stage 1 extended styling modifications into the interior. Stage 2 added performance suspension, and stage 3 added engine performance with features like a supercharger. These packages could be fitted to a convertible or a coupe.