1979-93 Mustang BBK Aluminum Underdrive Pulley Kit by BBK Performance

1979-93 Mustang BBK Aluminum Underdrive Pulley Kit
1979-93 Mustang BBK Aluminum Underdrive Pulley Kit
1979-95 Mustang How to Measure Serpentine Belt Length (5.0)
How To Remove & Install Pulleys On Your Fox Body Mustang (79-93)

Fee up the horsepower on your Mustang Fox Body with a set of BBK 79-93 Mustang 5.0 Aluminum Underdrive Pulleys!

Item #BBK-1553
MPN# 1553

Everyday Low Price: $199.99

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This product cannot be sold or shipped to the state of California. More Details
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  • Ford Mustang - 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993
Fitment Notice
  • The alternator pulley in this kit will only work with the stock 75 amp alternator.
  • The underdrive alternator pulley will NOT work on 3g upgrades.
  • Due to the difference in diameter from the stock Mustang pulleys, the charging system may need to be upgraded if you have a large stereo system. 
Made in the USA


  • Increase Horsepower
  • Reduce Drag
  • Made in USA


  • Satin or "clear" Finish Pulleys
  • Billet Aluminum
  • Installs with simple hand tools

 What's in the Box

  • (1) Crank Pulley
  • (1) Water Pump
  • (1) Alternator Pulley
  • Installation Hardware

BBK Aluminum Underdrive Pulleys
Made from aircraft-quality machined steel or aluminum alloy these BBK Mustang under drive front accessory pulley kits are one of the easiest ways to free up an average 8-15 horsepower in under 30 minutes. These Mustang BBK pulley kits are designed as direct bolt on replacements for the current Ford factory pulleys and retain full cooling and charging characteristics. Each BBK Mustang underdrive pulley kit is vehicle specific. They are designed and tested at the BBK headquarters in Southern California for maximum performance.

BBK Quality
These underdrive pulley kits are available in a hand-polished aluminum finish or gloss black powder-coated steel. Each Mustang pulley kit comes with complete installation instructions and allow the use of existing serpentine belts.

Pulley Measurements
  • Alternator Pulley - 2.56"
  • Crank Pulley - 4.75"
  • Water Pump Pulley - 5.25"

This product is intended for off-road use only, and is not legal for use in emission restrictive states. Off-Road Disclaimer

BBK Warranty - Click Here

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!

California Residents:
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About This Brand

BBK Performance
BBK Performance - Today's Performance
Since 1988 - BBK has dedicated itself to designing and building cutting-edge high-performance parts and accessories for today's EFI-equipped Mustangs and Ford Lightnings while maintaining the OEM quality levels.

From their world-famous line of "Power-Plus-Series" performance throttle bodies to their hundreds of "CNC-Series" performance exhaust offerings - the BBK brand is known for delivering unmatched value and quality. Shop BBK for your Mustang headers, exhaust, cold air intakes, and other performance parts!
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