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Roush R2300 550HP Supercharger - Phase 2 Kit (05-09 GT)

Market Price $7,035.99 You Save 2% ($135.00)
Our Price

$6,900.99 (kit)

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  • Item 389811
  • MPN# 421100

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Features & Details

  • Phase 2 Kit - 550 HP and 500 lb-ft at the Flywheel
  • ROUSH Phase 2 R2300 Supercharger
  • 80mm Supercharger Pulley
  • Single Belt Phase 2 Kit
  • ROUSH® Cold Air Intake System
  • Twin 60mm Electronic Throttle Body
  • Unique Fuel Rail with 52 Lb/Hr Fuel Injectors
  • Fits 2005-2009 GT's with a Manual Transmission Only
Unleash 235 More Horses. Stock the 2005-2009 4.6L 3V V8 GT Mustangs come with an impressive 315 Horsepower and 325 lb/ft of Torque from the factory, but with a Roush R2300 Single Belt Phase 2 Supercharger kit installed the numbers jump to an astounding 550 horsepower and 500 lb-ft of torque; that's 235 more than stock.

Monstrous blower kit, Roush style. This complete package transforms your GT into a track-shredding beast. Comes with a 2.3L TVS® supercharger with black finish, upper and lower intake manifolds, an intercooler, a low temp radiator, the ROUSH® cold air intake system, a dual 60mm electronic throttle body, a 80mm bolt-on pulley and a unique fuel rail with 52 lb/hr fuel injectors.

New High-flow Technology. The ROUSH Phase 2 R2300 supercharger features Eaton's new cutting edge Twin Vortices Series technology (TVS) rotating assembly that delivers more power and better fuel economy in a smaller package for uncompromising performance. This a roots-type, positive displacement supercharger features twin four-lobe rotors that are twisted 160-degrees to greatly enhance thermal efficiency, enabling higher volume capacity, and higher operational speeds.

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). This kit also features the ROUSH® logo, showing that serious performance lies within when you raise your hood.

Application. This Roush R2300 550HP Single Belt Phase 2 Supercharger Kit is specifically designed for use on 2005-2009 GT Mustangs equipped with the 4.6L 3V Modular V8 engine. Fits manual transmissions only. NOT approved for sale or installation in the state of California.

Please Note: Roush Supercharger Systems are built to order for our customers and accordingly. Because of this there can be a 5 to 7 day lead time on orders once your information is received.

Fitment: 2005 2006 2007 2008 2009 Details

What's in the Box
  • TVS2300 Supercharger
  • Upper Intake Manifold
  • Lower Intake Manifold
  • Low temp radiator
  • Intercooler
  • ROUSH cold air intake system
  • Dual 60mm electronic throttle body
  • Fuel rail with 52 lb/hr fuel injectors
  • 80mm bolt-on pulley
  • ROUSH PCM Flash Voucher Card
  • All necessary hardware
  • Installation Instructions
Installation Info
Tech Specs
Will it fit my Mustang?
  • GT - 05, 06, 07, 08, 09
  • Bullitt - 08, 09

Most Helpful Reviews


Supercharger is a awesome kid for a 4.6 plenty of power but getting the most expensive supercharger browse still charges you $100 even with the vector card

Helpful (1)

Great Supercharger kit

I paid my mechanic to install it on my car, it took him like 6 hours to get it up and running. So far it has been a great experience it offers an enormous amount of power wich was the necessary that I ...

Read More
Helpful (1)

Overall Rating 5 out of 5 stars
Read All 2 Reviews

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11 Questions / 5 Answers

Ask a Question

Is there any transmission work that has to be done to the car or can the stock transmission take the power?


  • Hello! You will likely need to upgrade your clutch to handle the new power from the Roush R2300 550HP Supercharger


Helpful (1)

Hello, I have a 2006 GT with 4,200 original miles and Ford Racing 4.10 gears. My Pony is like New. Do I have to make any internal changes to run this Supercharger right now? I will be upgrading to an Exedy Stage 2 Clutch, Exedy lightweight flywheel, one piece aluminum driveshaft rated at 900 HP, and the Ford Racing Dual fuel Pump Kit along with a Big Brake set up. Are the 4.10's too steep? I have seen vids of guys running 4.10's Supercharged and they love it. I have a Hurst Short Throw Shifter and I have toughened up the rear with a Whiteline Adjustable Panhard Bar, Whiteline Panhard Brace, Whiteline Lower Control Arms, Whiteline Relocation brackets being lowered, and an Eibach Anti-Roll/Sway bar kit front and rear. Can I do this? Thanks in advance AM or anyone who answers my question.


Hello I have a 2006 mustang gt and I was wanting to get a supercharger, now what all should I upgrade if I wanted to get the roush R2300 Supercharger phase 2 kit? would I have to upgrade anything else, such as clutch and flywheel? or is there more that would be recommended to upgrade?


  • Depending on what kind of shape your clutch is in at the moment and how you drive determines how much longer it will last. I have been running this kit for about two years now on my stock clutch which was in fairly good shape to begin with and it is just starting to slip now (installing a new clutch as a winter project at the moment). My car had about 60K miles on it at the time of the Roush Supercharger install, and I have always been careful to let the clutch full engage before giving full power, which is probably why it lasted as long as it did. If you are going to be power shifting much at all, you will probably burn the clutch out in no time as this kit adds a significant amount of power over stock. Although the kit does not come with a fuel pump upgrade, I would probably add (I did) a 'Boost a Pump" for insurance (a lot of people go with the duel fuel pump from Ford racing, but is pricey) as the biggest engine killer when going to a supercharger kit is running lean because of inadequate fuel supply.


Helpful (1)

Will the Ford Performance Twin 62mm Throttle Body fit on this


  • Roush R2300 550HP Supercharger - Phase 2 Kit (05-09 GT) will fit with the use of a ford performance twin 62mm throttle instead of the 60mm twin throttle body it comes with.


Helpful (0)

I have a 2010 gt 4.6l 3v will this kit work with this year mustang


  • Due to some differences from 2009 to 2010, this kit will not work with your vehicle. Roush does have a compatible unit, specifically designed for the 2010 GT models only. It is still the Roush R2300 550HP Supercharger phase 2 kit, item 389796, with those minor differences corrected. http://www.americanmuscle.com/roush-r2300-phase-2-supercharger-2010gt.html


Helpful (0)

How much Hp could you get out of this supercharger with a stroker kit on your motor. can you get over 550hp


  • Yes you can, but you would have to have a professional tuner to do a custom tune yo you specific set up you are running in your car, you may have to upgrade your pulley too add more boost to your set up


Helpful (0)

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Customer Reviews (2) Write a Review

Overall Rating 5.0

out of 5 stars

Installation Time:Shop Install

Installation Cost:$250-$500

  • Performance Gain 5 5
  • Fit 5 5

  • 5/5

    May 16, 2017


    Supercharger is a awesome kid for a 4.6 plenty of power but getting the most expensive supercharger browse still charges you $100 even with the vector card


    Year: 2009 Submodel: GT

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $250-$500

    March 21, 2016

    Great Supercharger kit

    I paid my mechanic to install it on my car, it took him like 6 hours to get it up and running. So far it has been a great experience it offers an enormous amount of power wich was the necessary that I needed. It comes with every single piece that you need screws everything you only need to have the tools which is why I took it to my mechanic.


    Year: 2006 Submodel: GT

    Helpful (1)

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