Mustang Underdrive Pulley (2005-2010)

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Our Price: $279.99 (USD) *
Part #: 401433
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Product Features

  • Gain 8-10 horsepower
  • Improved fuel efficiency
  • Increased accessory (such as the alternator) life
  • 25% reduction in pulley diameter over stock
  • Fits 2005-2010 4.6 V8 Ford Mustang GTs
  • Does not fit ROUSHcharged™ vehicles
  • Part #401433
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ROUSH®'s Mustang Underdrive Pulley gives your ride a bump up in horsepower, and gas mileage.

This underdrive pulley is for Mustang GT models 2005-2010 with a 4.6L engine only, and does not work with ROUSHcharged vehicles.

Gain more horsepower, gas mileage, and accessory life with the ROUSH® 25% reduction Mustang Underdrive Pulley. This pulley fits 2005-2010 Ford Mustang GTs with the 4.6L engine only, and does not work with ROUSHcharged™ vehicles.

The ROUSH Mustang Underdrive Pulley dampens damaging engine harmonic vibration, meets SFI Spec. 18.1 and has a diameter that is 25% less than stock. The benefit is that 25% less power is diverted to running accessories, such as the alternator.

As a result, more power is freed for performance. This part has been found to increase power by 8-10 hp. Due to the increased efficiency, fuel economy is also increased. In addition, because the accessories run by this belt are being run at reduced rate, their longevity is improved.

Mustang: 2010, 2009, 2008, 2007, 2006, 2005

* Please note that prices stated here are only for sales within the continental United States only ordered via the ROUSHperformance.com web site. Prices for other territories, such as Canada, may vary due to shipping fees, duties, and other factors. Please also note that orders placed on the ROUSHperformance.com web site can only be shipped to areas within the continental U.S.