Product DescriptionUPR Billet Underdrive Pulley Set for 2001-2004 GT Mustangs with the Short Style Water Pump.
UPR's all new 4.6L billet aluminum underdrive pulley set has shown gains of up to 10-15HP. These pulleys increase the power of your Mustang by slowing down the power robbing accessories. Machined from billet aluminum with a satin finish for great looks and functionality. Installs in approximately 1 hour or less. Includes a short water pump pulley and all necessary hardware.
Made in the USA!
*Retains the use of stock belt size.
2001 Model Owners:
Midway through the production run for the 2001 model year Ford changed the design of the water pump on the 4.6L engine. The older style pump produced from 1996 to mid 2001 had a longer shaft. In January of 2001 the design of the pump was changed to a shorter shaft. This necessitated a change in the design of the pump pulley.
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