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1979-93 Mustang ASP Aluminum Underdrive Pulley Kit by ASP

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ASP Mustang Aluminum Underdrive Pulley Kit (79-93) 824125

Add horsepower and style to your Fox Body with these 79-93 Mustang 5.0 Satin Aluminum Underdrive Pulleys.

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Item #ASP-824125
MPN# 824125

Everyday Low Price: $124.99

Availability: In Stock
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Benefits

  • Increase Horsepower
  • Added Detail

Features

  • Satin or "Clear" Finish Pulleys
  • Billet Aluminum Construction
  • 25% Underdrive Crank
  • 15% underdrive Water Pump
  • 950 RPM Full Charge
  • Installs with simple hand tools

What's in the Box

  • (1) 25% Crank Pulley
  • (1) 15% Water Pump Pulley
  • (1) 2.47" Alternator Pulley

Product Description

ASP Aluminum Underdrive Pulley Kit
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.

Product Note
Due to the difference in diameter from the stock Mustang pullies, the alternator and charging system may need to be upgraded if you have a large stereo system.

Pulley Measurements
  • Alternator Pulley - 2.47"
  • Crank Pulley - 4.625"
  • Water Pump Pulley - 5.438"
Application
  • Fits 1979-1993 V8 Mustangs



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    Product Videos

    More videos of this product!

    1979-95 Mustang How to Measure Serpentine Belt Length (5.0) 1979-95 Mustang How to Measure Serpentine Belt Length (5.0)
    (1:06)
    How To Remove & Install Pulleys On Your Fox Body Mustang (79-93) How To Remove & Install Pulleys On Your Fox Body Mustang (79-93)
    (3:45)

    Check out our YouTube channel for even more tech tips, installation videos, how-tos, and more. The best place to go for anything Mustang related!

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    Vehicle Applications

    Ford Mustang - 1979 (79) - 1980 (80) - 1981 (81) - 1982 (82) - 1983 (83) - 1984 (84) - 1985 (85) - 1986 (86) - 1987 (87) - 1988 (88) - 1989 (89) - 1990 (90) - 1991 (91) - 1992 (92) - 1993 (93)

    About This Brand


    ASP
    ASP - Quality. Performance. Products.
    ASP is one of the industry's leading producers of Mustang performance pulleys. Since 1988 ASP has been machining underdrive pulleys in house to give you the most performance for your Mustang. Each pulley goes through a CNC lathe for accurate measuring and cutting. The pulleys go through 2 cycles and a quality check to ensure each part is perfect before it leaves out of the door.

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