Free Shipping On Orders Over $75. Details

Talk to a Mustang Enthusiast
M-F 8:30A-11P, Sat-Sun 8:30A-9P
$12k Summer Sweeps, 3 Chances to Win! Enter Now >
Earn $100! Claim Now >

Roush Underdrive Pulleys (05-10 GT)

Item 69031
AmericanMuscle no longer carries the Roush Underdrive Pulleys (05-10 GT). Please check out 2015-2022 Mustang Underdrive Pulleys for an updated selection.
Call a Mustang Enthusiast at 1-877-887-1105
M-F 8:30A-11P, Sat-Sun 8:30A-9P

    Product Information

    Features, Description, Q&A, Specs & Installation


    • 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.

    CA Residents: WARNING: Cancer and Reproductive Harm -

    Installation & What's in the Box

    Installation Info

    What's in the Box

    • (1) Crankshaft Damper Pulley
    • (1) Water Pump Pulley
    • (1) Crankshaft Damper Bolt
    • (1) Alternator Bolt

    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

    Questions & Answers

    10 More Questions

        Related Mustang Categories