15-17 Ford Mustang Roush 421994 Phase 1 to Phase 2 Supercharger Upgrade Kit 727 HP

Boost your Mustang GT’s horsepower from 670 to 727 with the Roush Phase 1 to Phase 2 supercharger upgrade kit. This kit is easy to install, 50-state emissions-legal, and includes a 3-year warranty.

Top Features:

  • 80 mm supercharger pulley
  • Cooler spark plugs
  • Digital fuel pump controller
  • Roush/Ford Racing calibration file

Vehicle Fitment:

  • 2015-2017 Ford Mustang GT
  • 5.0L V8 engine
  • Roush Phase 1 supercharger system
Vendor: Roush
SKU: RSH421994
Availability: 2 In Stock
$ 1,299.99 USD
On-Sale $ 1,299.99 USD
Normally $ 1,299.99 USD
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UPC: 844764006133
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Roush 421994 15-17 Ford Mustang Phase 1 to Phase 2 Supercharger Upgrade Kit 727 HP

If you already have the Roush Phase 1 supercharger system installed on your 2015-2017 Ford Mustang GT, and you want to take your performance to the next level, then you need the Roush Phase 1 to Phase 2 supercharger upgrade kit. This kit will boost your horsepower from 670 to 727 and your torque from 545 to 610 lb-ft, giving you a thrilling driving experience.

Key Features:

  • 80 mm supercharger pulley that increases boost pressure
  • Cooler heat range spark plugs that prevent detonation
  • Digital fuel pump controller that safely and reliably increases fuel delivery
  • Roush/Ford Racing Phase 2 calibration file that optimizes engine performance and drivability

Benefits:

  • Easy and quick installation with plug-and-play wiring harness and preset fuel pump controller
  • No need to replace the belt or open the fuel system
  • Compatible with both manual and automatic transmissions
  • Includes 3-year/36,000-mile Roush parts only limited warranty
  • Voids optional Roush limited powertrain/drivetrain warranties

Product Specs:

  • Supercharger pulley diameter: 80 mm
  • Spark plug heat range: 0
  • Spark plug gap: 0.9 mm
  • Fuel pump controller voltage: 12 V
  • Fuel pump controller current: 10 A
  • Calibration file format: RDT
  • Product weight: 5 lbs
  • Product dimensions: 12 x 8 x 6 inches
  • Product color: Black

Install Difficulty Level:

The installation of this upgrade kit is intermediate and requires basic tools and skills. The estimated time for installation is 3 hours, according to the manufacturer’s instructions. You will need to remove the stock air filter housing, install the new supercharger pulley, spark plugs, and fuel pump controller, and flash the PCM with the RDT voucher. No cutting or splicing of wires is required.

Vehicle Fitment:

This upgrade kit is designed to fit the following vehicles:

  • 2015-2017 Ford Mustang GT
  • 5.0L V8 engine
  • Roush Phase 1 supercharger system (PN 421823)

 

If you have any questions about this product or to report product description inaccuracies, contact the MPT Performance experts at (407) 636-7077 or by email.

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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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