1979-93 Ford Mustang ASP Aluminum Underdrive Pulley Kit - Fox Body by ASP

Mustang ASP Aluminum Underdrive Pulley Kit (79-93)

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Mustang ASP Aluminum Underdrive Pulley Kit (79-93)

Get some horsepower and add some underhood detail with these 79-93 Mustang 5.0 Satin Aluminum Underdrive Pulleys.

Item #ASP-824125

Everyday Low Price: $114.99

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  • Increase Horsepower
  • Added Detail


  • Satin or "Clear" Finish Pulleys
  • Billet Aluminum Construction
  • 25% Underdrive Crank
  • 15% underdrive Water Pump
  • 2.5" Alternator
  • 950 RPM Full Charge
  • Installs with simple hand tools
  • Fits 1979-93 5.0L or V8 Mustang

What's in the Box

  • (1) 25% Crank Pulley
  • (1) 15% Water Pump Pulley
  • (1) 2 1/2" Alternator Pulley

Product Description

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.

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.

These ASP Mustang underdrive pullies work great on a stock or modified V8 GT or LX Mustang!

See what our customers have to say about this product!
Check out customer reviews.

Customer Photos (1)

Product Reviews (4)

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3 of 4 REVIEWS
3 of 4 REVIEWS

5 Stars   ASP pulley set great upgrade!
By on 5/26/2014
I bought this underdrive pulley set to free up a few more horses. Fit perfect, great quality, and faster revs!

Yes, I would recommend this item to a friend!

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5 Stars   Nice product
By on 9/22/2014
I bought these as a replacement for the stock pullies. They fit great and installation went smoothly without any issues. They look good too!

Yes, I would recommend this item to a friend!

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5 Stars   great purchase
By on 6/6/2014
I bought 3 items. This month i m so happy with all 3 purchases. Slp bullets hurst short shifter and under drive kit i rocomend all 3 products

Yes, I would recommend this item to a friend!

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5 Stars   great pulley set
By on 4/16/2014
great product

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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 - 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. Shop ASP Racing underdrive pulleys at LatemodelRestoration.com.

Look for Similar Items by Category

Ford Mustang Parts » Mustang Engine & Underhood » Mustang Accessory Drive » Mustang Pulleys
1979-1993 Mustang Parts » 1979-1993 Mustang Engine Parts » 1979-1993 Mustang Accessory Drive » 1979-1993 Mustang Pulleys

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