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Roush Phase 1 to Phase 2 Supercharger Upgrade Kit (18-21 GT)

Item 408707
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Market Price $689.99 You Save 13% ($90.00)
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$599.99 (kit)

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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Serious Power Upgrade
      • Upgrade from 700 to 750 HP
      • Upgrade from 610 to 670 ft. lbs.
      • Larger Full-face Low Temperature Radiator
      • Roush PCM Flash Voucher Card Included
      • Three Year/36,000 Mile Limited ROUSH Powertrain Warranty Included
      • CARB EO Number: D-418-41
      • Fits 2018-2021 GT Mustangs with a Roush Phase 1 Supercharger


      Much More Horsepower! Increase the power output of your Roush R2650 Phase 1 supercharger from 700HP/610 ft-lb to an impressive 750HP/670 ft-lb with a Phase 1 to Phase 2 Supercharger Upgrade Kit. That's an increase of 50 horsepower and 60 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, larger, full-face low temperature radiator for improved cooling capacity, a 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. Roush charger 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).

      Three-Year/36,000 Mile ROUSH Powertrain Warranty. Roush Supercharger Kits come with an extended powertrain warranty, which is good for 3 years or 36,000 miles from the date of retail purchase for complete peace of mind. Some exclusions may apply, please see manufacturer's warranty for complete details.

      Application. This Roush Phase 1 to 2 Supercharger Upgrade Kit fits 2018-2021 GT Mustangs equipped with the 5.0L Coyote V8 engine and a Roush Phase 1 R2650 Supercharger installed.

      Fitment: 2018 2019 2020 2021 Details

      Roush 422185

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Low Temperature Radiator Assembly
      • (2) Brackets
      • (1) RDT Voucher Card
      • (1) Foam Seal

      Customer Reviews (13)

        Questions & Answers

        10 More Questions

        Will It Fit My Mustang