The Ford tuning specialists at Roush have released a new Stage 3 kit also called the RS3 package for the 2012 Ford Mustang sports car. Two months ago the Stage 1 and 2 kits were launched, and now with the Stage 3, the Mustang reaches a whole new level. This one was specially made for the 5.0-liter V8, fitted with a R2300 ROUSHcharger, and boosting the car 12 psi. Final numbers after the performance tuning, new induction system, and custom exhaust show figures of 540 horsepower and 465 lb-ft of torque. The tuners didn’t stop there however, they also customized the exterior to make it more unique.