While aftermarket louvers are already available for the new Mustang, none have been designed by Jack Roush himself and engineered by the same team that produced the ROUSH 427R. The official ROUSH ...

The 435-hp Roush 427R, by comparison, was just right. Fewer horses to pull the cart, but the suspension upgrades turned the car from a quarter horse into the kind of any-road-any-time sporting ...