Roush Performance 421389 Phase 2 Supercharger Upgrade Kit

ROUSH 2011-2014 Ford Mustang Supercharger - Phase 2 625 HP Upgrade Kit
The ROUSH Mustang Phase 2 - 625 HP Supercharger Upgrade Kit includes all of the necessary components to increase your ROUSH Supercharged Mustang to 625 HP & 525 lb-ft. It comes w/a new 85mm S/C Pulley, Shorter FEAD Belt, Cold Air Induction System, ROUSH Flash Voucher card & Installation Instructions.Hundreds of hours of research & testing go into the development of the ROUSH superchargers including testing in extreme environmental temperatures from -20 degrees up to & through 120 degrees Fahrenheit & at higher altitudes of 14,000 ft for quality & performance. Over 40 emissions tests to ensure that the Mustang still makes the same emissions & that all the Ford engine diagnostics functions as intended but this kit is currently not CARB approved. Engine dynamometer development allows for the re-map camshaft positions & many other aspects of the calibration.