This precision crafted aftermarket pulley reduces rotating weight for quicker throttle response and increased HP due to reduced parasitic drag. Installs same as factory and is a direct replacement. Black anodized for corrosion and wear resisitance. Proudly Made in the USA by MMR Fits all 1996 - 2004 Mustang GT and Cobra along with MANY other 4.6 models. Includes PULLEY ONLY! PUMP NOT INCLUDED!