1994-2004 Mustang V8 Underdrive Pulleys

Auto Specialties underdrive pulley systems increase engine horsepower by reducing the amount of power required to drive external accessories. For example, the alternator, power steering, water pump and air conditioner all rob horsepower from the engine. By replacing factory-sized crank and accessory drive pulleys with a resized pulley, the accessories are slowed, resulting in more horsepower available to drive the rear wheels. Typically, a set of Auto Specialties street pulleys will increase output by 12 to 15 horsepower, resulting in quarter mile time improvements of .2 to .25 seconds. All pulleys are CNC machined from billet steel or aluminum, exceeding factory quality.

March Performance Pulley systems are designed to increase horsepower by reducing accessory drag on your motor. Pulley sets are machined from billet aluminum and hand polished and finished. With March's single piece Performance Series pulley, a 12 horsepower increase is typical. The Power and Amp Series pulley set is a two piece set that consists of a smaller alternator pulley that does not put excessive drain on the alternator. This is ideal for vehicles with high amperage needs such as heavy stop and go driving or large stereo systems.