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 over the 670hp / 545 lb-ft Phase 1 System

The result is an outstanding 727hp / 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.

The upgrade installs easily with a preset plug and play fuel pump controller, colder heat range spark plugs, and a higher boost 80mm supercharger pulley. A ROUSH Diagnostic Tool (RDT) flash voucher is in the box, and your upgraded Phase 2 calibration can be downloaded to your ECU in minutes by us here at Mustang Motorsport.

Included in the Kit:
- Fuel pump controller
- 80mm Supercharger Pulley
- 8x NGK Spark Plugs
- RDT Flash Voucher
- 50-State emissions-legal (CARB E.O. #D-418-29).

This kit comes with an extended parts warranty (ROUSH Supplied Parts Only), which is good for 3 years or 36,000 miles from the date of retail purchase. Please note that if this system is installed on a 2015-2017 ROUSH Stage 3 Mustang, the vehicle's powertrain warranty will be voided.

Features:
- 727hp @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 NGK 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 Powertrain/Drivetrain warranties

(421994)

Click here to download installation guide.

Installation Information:
Tools Required: Workshop Tools & ROUSH Tuning Software
Time of Install: About 3 Hours
Level of Difficulty: Tech Required

SKU 421994
Brand ROUSH Performance
Unit Of Measure ea

ROUSH 90-Day Limited Parts Warranty

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