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Roush 421994
The ROUSH Phase 2 supercharger upgrade kit builds on the outstanding performance of our Phase 1 supercharger system by adding proven core components and careful calibration, for an additional 57 horsepower and 65 lb-ft of torque over our 670 hp/ 545 lb-ft system (PN 421823). 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. The upgrade installs easily with a preset plug and play fuel pump controller, colder heat range spark plugs, and a higher boost 80 mm supercharger pulley. A ROUSH Diagnostic Tool (RDT) reflash voucher is in the box, and your upgraded Phase 2 calibration can be downloaded to your ECU in minutes by your dealer. Included in the Kit: Fuel pump controller, 80mm Supercharger Pulley, (8) NGK Spark Plugs and, RDT Reflash Voucher and Warranty. Note: 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. Note: If this system is installed on a 2015-17 ROUSH Stage 3 Mustang, the vehicle's powertrain warranty will be voided.This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2015-2017 | Ford | Mustang | EcoBoost |
| 2015-2017 | Ford | Mustang | EcoBoost Premium |
| 2015-2017 | Ford | Mustang | GT |
| 2015 | Ford | Mustang | GT 50 Years Limited Edition |
| 2015-2017 | Ford | Mustang | GT Premium |
| 2015-2017 | Ford | Mustang | Shelby GT350 |
| 2015-2017 | Ford | Mustang | Shelby GT350R |
| 2015-2017 | Ford | Mustang | V6 |
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Roush 421994 Specifications
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Roush 421994 Specifications
Is this item in stock?If it is purchasable it is unstock and available for shipment as soon as today.
How long will it take to get it?
Shipping to US addresses generally takes 2 to 4 business days to arrive depending on your location. We also offer Next Day Air and 2nd Day Air if you need it faster.
International shipping is subject to import duties and taxes and we usually see 4 day to 2 week ship times to most locations outside the USA.
Does this fit my vehicle?
We have fitment charts in most of our vehicle specific products. If you do not see your vehicle, please do not hesitate to ask via chat or contact form.
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Our return policy can be found here: Return Policy
Roush 421994 - Forced Induction Components
Roush 2015-2017 Ford Mustang Phase 1-to-Phase 2 727HP Supercharger Upgrade Kit
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The ROUSH Phase 2 supercharger upgrade kit builds on the outstanding performance of our Phase 1 supercharger system by adding...
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