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Roush Phase 1 to Phase 2 Supercharger Upgrade Kit - 727hp (15-17 GT)

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

$1,049.99

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  • Item 390770
  • MPN# 421994

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Features, Video & Details

  • Roush Phase 1 to Phase 2 Supercharger Upgrade Kit
  • Upgrade to 727 Horsepower and 610 lb-ft of Torque
  • Includes 80mm Pulley, Motorcraft Spark Plugs and Plug & Play Digital Fuel Pump Controller
  • Roush PCM Flash Voucher Card Included
  • 3 Year / 36,000 Mile Limited Warranty on Roush Parts Only
  • Fits 2015-2017 GT Mustangs with a 670HP Roush Phase 1 TVS Supercharger Kit

Review & Installation Video

Review & Install Video

More Horsepower and Torque! Increase the power and performance of your current 670 HP Roush R2300 Phase 1 Supercharger to an impressive 727 horsepower and 610 lb-ft of torque with a Phase 2 Supercharger Upgrade Kit.

Kit Includes. The Roush Phase 1 to Phase 2 Supercharger Upgrade Kit includes a new 80mm S/C Pulley, a preset plug and play digital fuel pump controller, cooler range Motorcraft spark plugs, 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 features a 3 Year/36,000 Mile Parts limited warranty (ROUSH Supplied Parts Only).

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). If you don't have access to a pass-through device, you have the option of sending your PCM back to Roush, where they will flash your PCM for an additional $100 fee.

Application. This ROUSH Phase 2 Supercharger Upgrade Kit works with both manual and automatic 2015-2017 GT Mustangs equipped with the Coyote 5.0L DOHC 4 valve V8 engine and a ROUSH R2300 Phase 1 TVS Supercharger that produces 670 horsepower. This voids optional Roush limited powertrain/drivetrain warranties.

Fitment: 2015 2016 2017 Details

What's in the Box
  • Preset Plug and Play Digital Fuel Pump Controller
  • Motorcraft Spark Plugs
  • 80mm Supercharger Pulley
  • ROUSH PCM Flash Voucher Card
  • Installation Instructions
Installation Info
Tech Specs
Will it fit my Mustang?
  • GT - 16, 15, 17

This Roush Phase 1 to Phase 2 Supercharger Upgrade Kit is specifically designed for 2015-2017 GT Mustangs with 670hp Roush TVS Supercharger Kit installed.

Most Helpful Reviews

4/5
Phase 2

20 Rear wheel horsepower gain....... Was hoping for a little more, but not bad!

Helpful (3)

5/5
And the winner is?

Nice upgrade, turned that GT into an animal, now suspension to keep the animal under control !!! Thank you American Muscle for such quick delivery, worth the wait!!!!' Capt. Mike

Helpful (1)

Overall Rating 4.8 out of 5 stars
Read All 4 Reviews

Customer Photos

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5 Questions / 4 Answers

Ask a Question

do i need to get my pcm reflashed if i already have the 670 hp tune with this upgrade?

ramigtrs

  • You will need to reflash your PCM as the calibration voucher for the upgrade will be included.

    KevinD92

Helpful (0)

Whats typical install time for a shop to install?

JasonH

  • Hello! The approximate install time for the Roush Phase 1 to Phase 2 Supercharger Upgrade Kit is 4 hours.

    VincentV

Helpful (0)

Will I be able to hear my blower after installing the phase 2 kit on my roush? I really miss the blower whine!

TrentC

would i have to upgrade fuel injectors on my 2015 GT?

Philip

  • The Roush Phase 1 to Phase 2 Supercharger Upgrade Kit - 727hp will not require larger injectors when used with 2015-2017 GT Mustangs with the 670HP Roush Phase 1 TVS Supercharger Kit. The Roush R2300 670HP Supercharger - Phase 1 Kit, Item 384386, already comes with larger injectors, and this upgrade kit will still use those injectors.

    AMJEFF

Helpful (0)

I have the 2015 Mustang gt with the ford racing supercharger installed on my car. I was wondering If the roush phase 2 supercharger upgrade kit will work with the ford racing supercharger. I know the supercharger was developed with Ford and Roush, however I have not seen any advertisement for the ford racing phase 2 upgrade.

Marvgt

  • The Ford Racing Kit and the Roush Phase 1 kits are the same. The difference is the calibration used on the PCM. The Ford part uses a Ford calibration. It should work provided that Ford can get a calibration. I was able to get mine calibrated for the 670HP update from early 627HP kit. Worst case, you would need to do a custom tune.

    Nightstorm

Helpful (0)

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Customer Reviews (4) Write a Review

Overall Rating 4.8

out of 5 stars

Installation Time:Full Day

Installation Cost:$100-$250

  • Performance Gain 4.25 4.3
  • Fit 5 5



  • 4/5

    Installation Time: Afternoon

    February 03, 2017

    Phase 2

    20 Rear wheel horsepower gain....... Was hoping for a little more, but not bad!

    Michael

    Year: 2015 Submodel: GT

    Helpful (3)

  • 5/5

    Installation Time: Afternoon

    June 23, 2016

    And the winner is?

    Nice upgrade, turned that GT into an animal, now suspension to keep the animal under control !!! Thank you American Muscle for such quick delivery, worth the wait!!!!' Capt. Mike

    captmike

    Year: 2015 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    June 09, 2017

    Roush Phase 1 to Phase 2 2015 Mustang GT

    Nice increase in power, runs great. Highly recommend a stronger clutch to take advantage of the horse power increase. I had a Mcleod RXT 1000 HP installed, great for street driving plus great performance. That Mustang is great, lots of fun.

    LarryS

    Year: 2015 Submodel: GT

    Helpful (0)

  • 5/5

    Installation Time: Afternoon

    April 14, 2016

    Hellcat killer!

    Worth the buy. Installation wasn't much of a hassle, but I would recommend getting someone professional to do it.

    Dane

    Year: 2015 Submodel: GT

    Helpful (0)

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