These are the first live photos of the improved new Mustang Roush. The car has a new aerodynamic bodykit consisting of new bumpers, front splitter, new hood with air vents, side air intakes, dual tailpipes, diffuser and spoiler. There are new wheels, larger brakes with rumors want the V8 engine delivers 550 horses. The model will be officially unveiled later this year, with sales starting early 2015.