Roush Performance 421994 - 727 HP 5.0L Ford Mustang Supercharger upgrade Kit from

The ROUSH Phase 2 supercharger upgrade kit builds on the outstanding performance of our 2015-2017 Phase 1 supercharger system by adding proven core components and careful calibration, for an additional 57 horsepower and 65 lb-ft of torque. The result is an outstanding 727 hp / 610 lb-ft of torque while retaining the daily confidence you expect from the engineering of ROUSH Performance. ROUSH engineers spend hundreds of hours in the laboratory, on the dyno, and out in the field to ensure the components and calibration deliver consistent performance in all conditions.

Product highlights for the 2015-2017 Roush Mustang Phase 1 to Phase 2 Supercharger Upgrade Kit - 727 HP:

• 727 hp @ 6,850rpm and 610 lb-ft @ 5,100rpm
• Preset plug and play digital fuel pump controller safely and reliably increases fuel pump output without opening fuel system
• Cooler heat range Ford spark plugs help ensure complete combustion without detonation under the higher boost levels of Phase 2
• Smaller diameter 80 mm pulley increases boost, installs in minutes, requiring no belt replacement
• Roush/Ford Racing Phase 2 calibration file delivered with exclusive Roush Diagnostic Tool (RDT)
• Includes 3-year/36,000-mile Roush Parts only limited warranty
• Voids optional Roush limited Powertrain/Drivetrain warranties
• 50-State emissions-legal on 2015-2016 Mustangs (CARB E.O. #D-418-29). APPROVED for sale or installation on 2017 model year in the state of California (CARB E.O. #D-418-34)

Unlock extraordinary power with the Roush Phase 2 supercharger upgrade kit, an enhancement that builds upon the exceptional performance of our Phase 1 supercharger system for the 2015-2017 model years. By incorporating proven core components and precise calibration, this upgrade delivers an impressive gain of 57 horsepower and 65 lb-ft of torque over our 670 hp/ 545 lb-ft system (PN 421823).

The result? An astonishing 727 hp and 610 lb-ft of torque, all while maintaining the daily drivability and confidence that you expect from Roush Performance's engineering excellence.

Behind this remarkable upgrade lies extensive engineering and testing, with Roush engineers investing countless hours in the laboratory, on the dynamometer, and in real-world conditions to ensure that both the components and calibration consistently deliver outstanding performance under various circumstances.

Installation is a breeze with the included preset plug-and-play fuel pump controller, colder heat range spark plugs, and an upgraded 80 mm supercharger pulley. Additionally, the package contains a Roush Diagnostic Tool (RDT) reflash voucher, enabling you to download the enhanced Phase 2 calibration to your vehicle's ECU within minutes through your authorized dealer.

Kit Contents:

- Fuel pump controller
- 80mm Supercharger Pulley
- (8) Ford Spark Plugs
- RDT Reflash Voucher
- Warranty

This kit is compliant with 50-State emissions regulations for 2015-2016 Mustangs (CARB E.O. #D-418-29) and is approved for sale and installation on 2017 model year vehicles in the state of California (CARB E.O. #D-418-34).

Additionally, this kit comes with an extended parts warranty (ROUSH Supplied Parts Only) covering 3 years or 36,000 miles from the date of retail purchase. It's important to note that if this system is installed on a 2015-2017 Roush Stage 3 Mustang, it may void the vehicle's powertrain warranty.