ASP Underdrive Pulley Silver Aluminum Set Mustang 5.0L 1979-1993



  • 12-15 HP Gains
  • Increased Mileage of 2-3 MPG
  • Resized Pulleys
  • Exceeds Factory Quality
MSRP $199.99
You save 15%

Set of ASP Silver Aluminum Underdrive Pulleys for 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992 and 1993 Mustangs with a 5.0L Engine.

This Set of ASP Silver Aluminum Underdrive Pulleys (824125) reduces the amount of power needed to drive external engine accessories, such as the alternator, power steering, water pump and air compressor. By slowing external engine accessories, these pulleys are typically able to create horsepower gains of 12-15 and increase mileage by 2-3 MPG. These pulleys will help you get the most out of your 1979-1993 Mustang's 5.0L engine. 

Features and Benefits:
- Increased Horsepower
- Reduced Drag
- Added Detail
- 25% Underdrive Crank
- 15% Underdrive Water Pump
- 2.5-inch Alternator
- 950 RPM Full Charge
- Simple Install with Basic Hand Tools

Slowing external engine accessories can be achieved by replacing your factory-sized crank and accessory drive pulleys with resized pulleys. This, of course, results in more horsepower available to the drive wheels. The pulleys in the set are made of premium billet aluminum coated in a silver finish. They even exceed factory quality!

Set Includes:
- (1) 25% Crank Pulley
- (1) 15% Water Pump Pulley
- (1) 2 1/2" Alternator Pulley
- Installation Hardware

California Residents: Proposition 65 Warning

Vehicle Fitment

This product will fit the following Mustang years:

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