Roush 2015-2017 Ford F-150 5.0L V8 Phase 1-to-Phase 2 650HP Supercharger Upgrade KitThe ROUSH Phase 2 supercharger upgrade kit builds on the outstanding performance of our 2015 2017 F150 Phase 1 supercharger system by adding proven core components and careful calibration. This kit adds an additional 50 horsepower and 28 lb ft of torque when used with our 600 hp 557 lb ft Phase 1 supercharger system (PN 421983). The result is an outstanding 650 hp 557 lb ft of torque while retaining the daily confidence you expect from the engineering