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Roush Phase 2 to Phase 3 Supercharger Upgrade Kit (11-14 GT)

Market Price $1,099.99 You Save 5% ($50.00)
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$1,049.99

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  • Item 69134
  • MPN# 421597

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    Features & Details

    • Upgrade to 675 Horsepower and 585 lb-ft of Torque
    • Maintains Original 3 Year / 36,000 Mile Limited Warranty
    • Roush PCM Flash Voucher Card
    • Fits 2011-2014 Manual GT Mustangs with Roush Phase 2 Supercharger Installed
    More Horsepower! Increase the power of your Roush Phase 2 Supercharger to an impressive 675 horsepower and 585 lb-ft of torque with a Phase 2 to Phase 3 Supercharger Upgrade Kit. That's an increase of 50 horsepower and 60 lb-ft of torque.

    Kit Includes. The Roush Phase 2 to Phase 3 Supercharger Upgrade Kit includes a new 80mm Supercharger Pulley, Fuel Pump Voltage Regulator with Plug-n-Play wiring harness, a ROUSH PCM Flash Voucher Card and installation instructions.

    Roush Performance quality - guaranteed. Roush is known for a rich tradition of excellent racing performance engineering at the highest level of OEM quality and design. This Supercharger upgrade kit maintains the original limited 3 year / 36,000 mile warranty.



    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 Phase 2 to Phase 3 Supercharger Upgrade Kit works for 2011-2014 GT Mustangs with the Roush Phase 2 supercharger installed. Fits manual transmissions only. Does not fit BOSS 302 models. NOT approved for sale or installation in the state of California.

    Fitment: 2011 2012 2013 2014 Details

    CA Residents: Warning: California's Proposition 65

    What's in the Box
    • Fuel Pump Voltage Regulator
    • Plug-n-Play wiring harness
    • Bolt on 80mm Supercharger Pulley
    • ROUSH PCM Flash Voucher Card
    • Installation Instructions
    Installation Info
    Tech Specs
    Will it fit my Mustang?

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    Customer Reviews (1) Write a Review

    Overall Rating 5

    out of 5 stars

    Installation Time:Shop Install

    Installation Cost:$100-$250

    • Performance Gain 5 5
    • Fit 5 5



    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      June 20, 2017

      Roush Phase 3 kit

      I was looking to increase my torque without installing long tube headers and figured this kit would be a nice start. As always, AM did an outstanding job in getting the kit to me; service was great! After installation, I had it on the dyno rack; 581 HP, 511 TQ. This was an increase of 21 HP and 67 TQ. The increase in torque is great and it seems that the gas mileage has improved a bit as well.

      IMASUDUK14

      Year: 2014 Submodel: GT

      Helpful (4)

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