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 quick stats for comparison: Ford Mustang GT: 4.6-liter V8, 315 hp, 325 lb-ft, five-speed manual, 3,550 pounds Roush 427R: 4.6-liter supercharged V8, 435 hp, 400 lb-ft, five-speed manual ...