ASP 1994-1998 Mustang 3.8L 25% Crank & 2-3/4" Alternator Underdrive Pulleys

What do Underdrive Pulleys do? 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.

25% Damper & 2-3/4" Alternator Pulleys

Full Charge: 950 RPM

Material: Hard Coat Black Alum

**Picture is for representation purposes only**