When the Roush 380R arrived in 2003, based on a standard Mustang GT, the Stage 3 offered an Eaton Roots-type supercharger with an air-to-water intercooler, a new intake, a secondary sheave front ...

Roush Performance is a company founded by former ... The Roush package adds a supercharger, cold air intake, and new engine tune with gains of 305 hp and 210 pounds-feet of torque over the ...