ROUSH is proud to introduce the 540hp 2012 Stage 3™ Mustang. The powertrain of this vehicle features the 5.0L 4-valve DOHC TiVCT engine further enhanced by the R2300 ROUSH supercharger, feeding 10psi of intercooled energy to the already robust Coyote engine. The ROUSHcharger increases the base horsepower from 412HP to an impressive 540HP. ROUSH stands behind this system with an impressive 3 year/36,000 mile full powertrain warranty. Read about this car.