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Roush Underdrive Pulleys (05-10 GT)

Market Price $279.99 You Save 6% ($17.02)

$262.97

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  • Item 69031
  • MPN# 401433

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Features & Details

  • Free Up 8 to 10 Horsepower.
  • Improves Fuel Efficiency
  • Two Piece Kit.
  • Black Finish.
  • Fits 2005 to 2010 4.6 GT Mustangs.
Free Up Horsepower. The Roush Underdrive Pulley Kit will allow you to gain more horsepower, gas mileage, and accessory life by using 25% less power than the stock pulley.

Quality Construction. This Roush 2-piece Replacement Pulley set is crafted from steel for durability and strength. They are completed in a black powdercoat finish for great looks under the hood.

Fitment. The Roush 2-Piece Underdrive Pulley Kit is designed for use on the 2005 to 2010 GT Mustang with the 4.6 SOHC V8 Engine and reuses the stock belt for installation. Not compatible with ROUSHcharged Mustangs.

Fitment: 2005 2006 2007 2008 2009 2010 Details

What's in the Box
  • (1) Crankshaft Damper Pulley
  • (1) Water Pump Pulley
  • (1) Crankshaft Damper Bolt
  • (1) Alternator Bolt
Installation Info
Tech Specs
UnderDrive Pulley Specifications
Year/Model: 2005-2010 GT Manufacture: Roush Performance
Material: Steel Finish: Black
Crank Pulley: One Piece Crank SFI Certifited: Yes
Will it fit my Mustang?
  • Bullitt - 08, 09
  • GT - 05, 06, 07, 08, 09, 10

Not compatible with ROUSHcharged Mustangs

Most Helpful Reviews

5/5
nice power adder for a quick install

The install went very swiftly, especially having a helping hand. The first time around I installed a new OEM belt and that snapped on my way home, I would advise anybody that gets a new belt to get a size ...

Read More
Helpful (4)

5/5
Amazing!!!

Just installed took about 45 min. Noticed a big difference with throttle response. Recommend this product!!!

Helpful (7)

Overall Rating 5 out of 5 stars
Read All 6 Reviews

Customer Photos (3) Submit Your Photo

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2 Questions / 5 Answers

Ask a Question

Will I require a new serpentine belt or will I need to buy a new one?

Army11

  • It uses the stock belt.

    pibirdman72

    Good Answer (0) (0)

Show 2 more answers Question Resolved

Will a roush charger work with these pulleys? im wanting to buy a rouch charger soon. will these work with?

vanmatre89

  • No. I have a 2006 gt convertible that I put a roush 2300 blower and intake kit in and I talked to roush directly and it will already have a 73mm pulley on (at least mine did). I bought mine around 9/2011. Hope this helps you out.

    ErbStalk

    Good Answer (0) (0)

Show 1 more answer Answer This Question I need this answered (0) (0)

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Customer Reviews (6) Write a Review

Overall Rating 5.0

out of 5 stars

Installation Time:Afternoon

Installation Cost:0-$100

  • Performance Gain 4.5 4.5
  • Fit 4.75 4.8



  • 5/5

    Installation Time: Less than 1 Hour

    April 27, 2012

    nice power adder for a quick install

    The install went very swiftly, especially having a helping hand. The first time around I installed a new OEM belt and that snapped on my way home, I would advise anybody that gets a new belt to get a size up (my mistake to not). Overall i'm very happy with the added horses the pulleys unleashed. The pony is pulling noticeably harder and to me seems like it has a meaner growl to her. I'd reccomend this to anybody that wants a nice install, clean fit, and quick power for under $250. Not having to see that huge piece of rust is a benefit to!!!

    shad2012

    Year: 2007 Submodel: GT Woburn, MA

    Helpful (4) (0)

  • 5/5

    August 21, 2010

    Amazing!!!

    Just installed took about 45 min. Noticed a big difference with throttle response. Recommend this product!!!

    Jonathan

    Helpful (7) (3)

  • 5/5

    Installation Time: Less than 1 Hour

    January 29, 2016

    Simple

    I have a 2005 mustang GT I recommend this Rouch underdrive pulley it's a good up grade I feel a big difference didn't take much to install.

    AKH

    Year: 2005 Submodel: GT Fresno

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    August 24, 2014

    Roush Underdrive Pulley

    Roush underdrive pulleys are really easy to put on and have a great fitment! I'm glad I went with this product and know that roush will never let you down with amazing materials and a professional finish. Recommend this product to anyone with a s197 stang!

    THill4

    Year: 2007 Submodel: GT Los Angeles, CA, USA

    Helpful (1) (0)

  • 5/5

    December 12, 2009

    Awesome

    Just installed and can tell a big difference in throttle response and looks great too.

    Stephen

    Helpful (6) (5)

  • 5/5

    Installation Time: Less than 1 Hour

    June 06, 2014

    Easy to install

    After reading problems with overheating I was skeptical about ordering, but did it anyways. Installed in about an hour, only took that long because I had to go rent the tool to put new pulley on. After driving around town, car didn't overheat even with the a/c on in about 95 degree weather. Temperature stayed about the same as before. Have noticed steering is a bit harder, a/c is still pretty cold. As far as noticing more HP, can't say for sure because the same day I did the pulley I installed Kooks Headers.

    AGH0304

    Year: 2005 Submodel: GT Hobbs, NM, USA

    Helpful (0) (1)

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