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Roush M90 Supercharger Kit - Black (05-08 GT)

AmericanMuscle no longer carries the Roush M90 Supercharger Kit - Black (05-08 GT). Please check out 2005-2009 Mustang Supercharger Kits & Accessories for an updated selection.
Market Price $5,099.99 You Save 2% ($124.00)
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  • Item 42153
  • MPN#420023

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Features & Details

  • Boost Your Engine to 435 HP & 400 Ft-Lb of Torque
  • ROUSH® M90 Roots-Style Supercharger
  • 50 State Legal
  • 3-Year/36,000-Mile Warranty
  • CARB EO Number: D-418-18
  • Fits Automatic and Manual Transmissions
435 HP, 400 lb-ft of Torque at the flywheel. The new ROUSHcharger M90 Supercharger kit kicks your 2005-2008 4.6L 3V V8 Mustang up to serious new levels of track-shredding power - while maintaining reliability, performance and engine durability across environmental and load conditions.

Monstrous blower kit, ROUSH style. Bring out the beast in your GT with a complete blower kit that includes the ROUSH® M90 Roots-style supercharger, intake manifold, air-to-water intercooler system, 73mm supercharger pulley (generating 5 PSI of boost), and high-flow fuel injectors and induction system.

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.

CARB Certified. Best of all this Roush Mustang Supercharger Kit is 50-state smog legal under Carb EO# D-418-25.

Roush Performance quality - guaranteed. Roush is known for a rich tradition of racing performance engineering at the highest level of OEM quality and design - so much so that this Supercharger kit is protected by an industry-leading 3 year / 36,000 mile drivetrain warranty (or one year on Roush components for vehicles already past their warranty date).

  • Fits 2005-2008 4.6L 3V V8 Mustangs with Manual or Automatic Transmissions
  • Brings total power of engine up to 435 hp and 400 ft-lb of torque at the flywheel
  • Black finish
  • Includes ROUSH® PCM Flash Voucher Card
  • Protected by industry-leading 3-year/36,000-mile warranty
  • 50 state legal
  • Features ROUSH® logo

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 Details

What's in the Box
  • ROUSH® M90 Roots-style supercharger
  • Intake Manifold
  • Air-to-Water Intercooler System
  • 73mm Supercharger Pulley
  • High-flow Fuel Injectors
  • Induction system
  • ROUSH PCM Flash Voucher Card
  • All Gaskets, Wiring and Hardware Necessary
  • Installation Instructions
Installation Info
Tech Specs
Will it fit my Mustang?
  • GT - 05, 06, 07, 08

Most Helpful Reviews

Eat's BMW + Porsche

This SC is used on my 2010 GT [AUTOMATIC]. Also installed is the ford racing chrome valve covers's [# 24024], Mishimoto Air diversion radiator cover plate [#80240], JLT oil separator [#62027], CDC front ...

Read More
Helpful (26)

Supercharger (\'07 GT)

I got the pulley upgrade to run higher boost. 450BHP and has lovely torque curve. Really worth the money when combined with the Roush Stage 3 suspension and quick throw gear linkage.

Helpful (29)

Overall Rating 5 out of 5 stars
Read All 8 Reviews

Customer Photos (11) Submit Your Photo

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13 Questions / 8 Answers

Ask a Question

I have an 05 GT, with an 07 GT engine in it. What the difference between the 05-06 and 07-08 kits? Thank you


  • The Roush M-90 Supercharger Kit will fit 2005 to 2008 GT. This unit will fit your 4.6 three valve. Duke7


Helpful (0)

Will a 2009 m90 fit on a 07? I just acquired a wrecked 09 roush and plan on pulling the charger.


  • allworknoplay Yes, the Roush M90 will fit 2005 thru 2010. The Roush R2300 will also fit the 2005 - 2010 Three Valve 4.6L Duke7


Helpful (0)

old engine and ford cams My 09 GT "automatic" has ford racing cams, is the M90 compatible? Also the engine is at 110,000 miles. Is the engine at risk if this is installed? The car is daily driven.


  • cammer Positive pressure induction systems work best with stock or somewhat milder cam timing. cams with increased overlap are non-productive, as you loose some of the pressure. So check with Roush about your particular cam. As far as older high mileage vehicles, Take a compression test, leak-down test, that should give you the heads up. Running lower amounts of boost will help you maintaining engine life. Duke 7


Helpful (0)

Fits Will this unit fit a 2007 Saleen with the 4.6 3 valve.


  • It will fit without issues. The 2005-2009 GT's used the 3v 4.6


Helpful (0)

Fuel pump? Is there a need for a better pump, or any other aftermarket item?


  • piezan76 When you first make the decision to add any type of positive pressure boost to an engine, make sure your engine has the ability for the type of unit you are looking at. Any good name manufacturer will offer a complete kit for the type of charger you have chosen. This will include all of the items you will require to have it function properly. Duke 7


Show 1 more answer Helpful (0)

Roush Supercharger Will the M90 fit under a strut tower brace?


  • Badidea The stock Strut brace will not work. Duke7


Show 1 more answer Helpful (0)

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Customer Reviews (8) Write a Review

Overall Rating 5.0

out of 5 stars

Installation Time:Weekend

  • Performance Gain 4.666667 4.7
  • Fit 4.666667 4.7

  • 5/5

    Installation Time: Shop Install

    September 03, 2011

    Eat's BMW + Porsche

    This SC is used on my 2010 GT [AUTOMATIC]. Also installed is the ford racing chrome valve covers's [# 24024], Mishimoto Air diversion radiator cover plate [#80240], JLT oil separator [#62027], CDC front lower chin spoiler [#11058-00] . Had the M90 installed by local Roush dealer [+ roush suspension + Roush boost gauge in AC vent pod]. The M90 blower for the 2010 is a different setup than the 05-09 !! Wiring harness is plug + play, NO splicing. Same spark plugs used. Reservoir bottle [ DE-gas] for the 2010 M90 is DOUBLE the size of the 05-09 bottle. Low temp rad [LTR] is FULL SIZE on the 2010, vs the small LTR rad on the 05-09. Water in the De-gas bottle is stone cold all the time, after extended 'blasting around'. The chin spoiler + Air Diversion plate combo ensures the 4 x front mounted rads all run very cool.[eng/AC/transmission/LTR]. The LTR is at the very front, and de-gas on a 2010 is just to the right of the oem eng rad reservoir bottle....and looks oem. Make sure you install both the catch can AND a K+N air filter. The stock air filter box on a 2010 will flow 800 cfm with a paper filter, and 980 cfm with a K+N. Chrome valve covers look cool..and are easy to install at the same time as the M90. You can either wind up in each gear, with no boost,OR push a little harder, and bam, instant boost, then hang on for the ride! Back off the gas pedal 2 mm and valve opens, no boost, then the upshift on the auto. Also NO loss of boost BETWEEN shifts, 1-2, 2-3, 3-4 ! That alone will ensure you win every time. Latest Roush calibration is superb on the 2010...esp with the K+N filter. The Roush tune also firms up the AUTO shift points. It's so drivable and totally transparent, my wife would never know there was a blower installed. Dead flat TQ curve..and globs of low end TQ, you have to learn how to feather the gas pedal. I use 275/40-18 Nitto-555 on the rear. The M90 is LIGHT vs the E-force. [ 85 vs 176 lbs shipping weight]. Roush nailed it with the 2010 version. Roush's TVS will NOT work with any Automatic, only standard. If you want to see BMW's going backwards in your mirror, this is the ticket. Last week, I smoked a neighbour's $153K porsche, he was not happy, blew his doors right off..[I could out corner him as well]. I have not lost once yet. The extra passing power is superb. Gas mileage is still the same. The one piece Al drive shaft goes in next month. The M90 is a HUGE bang for the buck. 50-100 mph is just a few seconds. 0-60 mph with an auto is lightning quick. Shut OFF the traction control when it's dry out..and ON when it's raining. I don't use boost when wet out. Roush strut brace will NOT fit a 2010 M90! Apparently somebody makes one that does fit.


    Year: 2010 Submodel: GT Victoria, BC, Canada

    Helpful (26)

  • 5/5

    March 05, 2009

    Supercharger (\'07 GT)

    I got the pulley upgrade to run higher boost. 450BHP and has lovely torque curve. Really worth the money when combined with the Roush Stage 3 suspension and quick throw gear linkage.

    Richard W

    Helpful (29)

  • 5/5

    February 13, 2009

    Supercharger Kit (2009)

    Great supercharger!! The car can really fly now. If you have an 09 make sure you get the 2009 supplemental kit as there are some extra parts to move the alternator. Very happy with the purchase and American Muscle!


    Year: 2009

    Helpful (14)

  • 5/5

    Installation Time: Full Day

    March 09, 2014

    very happy with this kit

    I installed this kit over two weekends, about 20 hours in all. Instructions were great, with pics every step of the way.if you can follow directions anyone can do it.It was a little tight in some places on passenger side,but it will all fit. This kit will not work with any fuel rails, but the ones included and also will not work with a throttle body spacer.


    Year: 2005 Submodel: GT Pekin, IL

    Helpful (2)

  • 5/5

    Installation Time: Full Day

    March 21, 2013

    this is the 1

    this will give you all you want for your daily driver.easy install as long as you got time it took about 13 hours to install from start to finish including breaks for eating, car is now amazing and still reliable. american muscle has the lowest price i found thanks AMC


    Year: 2005 Submodel: GT Wyoming, USA

    Helpful (2)

  • 5/5

    October 06, 2008


    Already had a custom engine in my Mustang and with this. This machine can do work!


    Helpful (3)

  • 5/5

    September 30, 2008

    Supercharger Kit (2005 GT)

    Great product at a great price!


    Year: 2005 Submodel: GT

    Helpful (3)

  • 5/5

    April 29, 2008

    super charger kit (2005gt)

    This is awesome that you sell for so cheap!


    Year: 2005 Submodel: GT

    Helpful (1)

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