| SPECIAL NOTICE: SPEC Clutches and Flywheels will closed June 27 – July 6. Orders received during this time will be shipped after July 6. Any orders received by Friday, June 20, should be shipped before we close for vacation. Orders placed after June 20 will be shipped based on availability and time constraints.
ASP 2005+ Mustang V6 Harmonic Balancer Crank Pulley.
Underdrive pulley systems increase engine horsepower by reducing the amount of power required to drive external engine accessories. For example, the alternator, power steering, water pump and air compressor 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 the drive wheels. Typically, a set of Auto Specialties street pulleys will increase horsepower by 12-15, and increase mileage by 2 to 3 MPG. All pulleys are manufactured from Billet Steel or Aluminum, exceeding factory quality.
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* Please note that there is a shipping discount on multiple items in the same order(excludes oversized items). The shipping amount here reflects a 1 item/part purchase. Shipping price reflects shipping within the contential US. All other locations extra.
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