Ford Mustang Supercharger Single Belt, Upgrade Phase 1-2 (2005-2009)

Free Shipping Our Price: $1499.99 (USD) *
Part #: 421101
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Live in Canada? Place your order at 800-597-6874

Product Features

  • Phase 1-2 upgrade for 2005-2009 4.6L 3V Mustang GT that is equipped with the ROUSH Phase 1 TVS 2.3L supercharger
  • Upgrades power from previous 475HP/435 ft-lb to 550HP/500 ft-lb
  • Includes a new bolt-on 80mm supercharger pulley, 6-rib serpentine belt, dual fuel pump upgrade, and re-calibration
  • Vehicle’s PCM is required to be re-calibrated with this upgrade– To be downloaded using the RDT software
  • NOT for sale in California or other EO “green” states
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Mustang Supercharger Single Belt Phase 1-2 Upgrade is engineered for 2005-2009 Mustangs.

This supercharger kit allows current owners of the Single Belt Phase 1 2005-2009 Mustang GT Supercharger (part #421099) to upgrade to a Phase 2 system. This system boosts the total power at the flywheel to 550 hp / 550 lb-ft (up from the 475 hp / 435 lb-ft of the Phase 1 kit).

The Mustang Supercharger Single Belt Phase 1-2 Upgrade belongs to a line of ROUSH Mustang supercharger kits designed to allow for easy upgrading.

The idea behind this line is that customers can buy in at one phase in the line and upgrade later while reusing as many parts as possible from the kit that they already have. This upgrade kit includes the components necessary to do just this.

This kit includes the following:

  • GT500 Fuel system Upgrade
  • 80mm pulley
  • ROUSH Flash Voucher Card

This part now utilizes the ROUSH Flash Voucher card to be calibrated using ROUSH Diagnostic Tool (RDT) software and pass-thru device. If you do not have access to an approved pass-thru device, you can send your PCM back to ROUSH to be flashed for an additional $100.00 fee.

Please contact Customer Care at 800-59-ROUSH if you have any questions.

The Single Belt Phase 1-2 2005-2009 Mustang Supercharger Upgrade kit works with 2005, 2006, 2007, 2008, and 2009 Ford Mustang GTs (4.6L 3V engine).

Mustang: 2009, 2008, 2007, 2006, 2005

  • Difficulty: Advanced
  • Time: 3 hours
  • Required Tools: Garage tools
* Please note that prices stated here are only for sales within the continental United States only ordered via the ROUSHperformance.com web site. Prices for other territories, such as Canada, may vary due to shipping fees, duties, and other factors. Please also note that orders placed on the ROUSHperformance.com web site can only be shipped to areas within the continental U.S.