The ROUSH Phase 2 Supercharger kit builds on the enhanced performance of the Phase 1 supercharger system and boosts the stock 5.0L V8 Ford Mustang GT to an astounding 750 horsepower and 670 pound-feet of torque. The high-capacity low temperature radiator provides increased cooling capability and works with Eaton's TVS R2650 technology for greater power output. The larger LTR and upgraded calibration work in harmony to improve cooling and optimize performance, giving drivers extra laps at the track. The Phase 2 Supercharger delivers thrilling power, unparalleled performance, and versatility across both manual and automatic transmissions. The complete system is optimized for 93-octane fuel for superior performance. ROUSH ensures every 2018-2021 5.0L Mustang Phase 2 Supercharger offers peace of mind with our 3-year/36,000-mile ROUSH limited powertrain warranty.50-State emissions-legal on 2018-2021 Mustangs (CARB E.O. #D-418-34).