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Roush R2300 Phase 1 to Phase 2 Supercharger Upgrade Kit (05-09 GT)

Item 389812
Market Price $1,499.99 You Save 4% ($60.00)
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    Features & Details

    • Serious Power Upgrade
    • Upgrade from 475 to 550 HP
    • Upgrade from 435 to 500 ft. lbs.
    • Bolt-on 80mm Supercharger Pulley
    • Pulley Ratio: 2.1
    • Dual Fuel Pump Kit
    • Roush PCM Flash Voucher Card Included
    • Fits 2005-2009 GT Mustangs with a Roush Phase 1 Supercharger
    Much More Horsepower! Increase the power of your Roush R2300 Phase 1 supercharger from 475HP/435 ft-lb to an impressive 550HP/500 ft-lb with a Phase 1 to Phase 2 Supercharger Upgrade Kit. That's an increase of 75 horsepower and 65 lb-ft of torque that you'll feel immediately upon installation!

    Kit Includes. The Roush R2300 Phase 1 to Phase 2 Supercharger Upgrade Kit includes a new 80mm Bolt-on Pulley, 6-Rib Serpentine Belt, Dual Fuel Pump Kit, ROUSH PCM Flash Voucher Card and installation instructions.

    Upgraded ROUSH PCM Calibration. ROUSH® PCM calibration is a success of engineering that maximizes the power of the system. ROUSHcharger owners will receive a ROUSH® PCM Flash Voucher Card, which is used to obtain the specific calibration needed for your Mustang and requires ROUSH Diagnostic Tool (RDT) software and a J2534 Pass-Through device to upgrade your PCM (software and pass-through device not included).

    Application. This ROUSH Phase 1 to 2 Supercharger Upgrade Kit fits 2005-2009 GT Mustangs equipped with the 4.6L Modular V8 engine and a ROUSH Phase 1 TVS Supercharger installed.

    Technical Note. This ROUSH Phase 1 to 2 Supercharger Upgrade Kit is

    not legal for use in California or other states adopting California emission standards.

    Fitment: 2005 2006 2007 2008 2009 Details

    MPN# 421101

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (1) 80mm Supercharger Pulley
    • (1) 6-Rib Serpentine Belt
    • (1) ROUSH Flash Voucher Card
    • (1) Dual Fuel Pump Upgrade
    Installation Info
    Tech Specs
    Will it fit my Mustang?

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        Questions & Answers (2)

        2 Top Rated Questions

        Any need for internals upgrade for the phase 2 kit? Car is street driven...

        • lnternal upgrades can vary based on additional mods, tune, etc., we recommend speaking with your and/or tuner directly for recommendations.

        Helpful (0)

        Why wont this fit the 2010 GT? its the same engine as the 05-09 GT.

        • Unfortunately the phase 2 kit is not available for 2010 Mustang as it was discontinued. Due to some differences between the 2009 an 2010, this kit will not work.

        Helpful (0)
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          Customer Reviews (1) Write a Review

          Overall Rating 5

          out of 5 stars

          • Performance Gain 5 5
          • Fit 5 5

          • 5/5

            December 18, 2016


            This product is a bit pricey but definitely worth every penny if you're looking to take your stang to the next level


            Year: 2008 Submodel: GT

            Helpful (18)

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