If you fancy a new Ford Mustang but are looking for some added muscle, few places will give you what you want and what you need like Roush. The veteran tuning house has just released its latest range of customized pony cars, and at the top of the line sits its most powerful model yet. In full-fat spec, the Stage 3 Roush Mustang supercharges the 5.0-liter V8 up to a whopping 565 horsepower and 505 pound-feet of torque. But the...