2001-04 Mustang BBK Underdrive Pulley Kit (Late 01-04) GT/Cobra 4.6 by BBK Performance

2001-04 Mustang BBK  Underdrive Pulley Kit (Late 01-04) GT/Cobra 4.6
2001-04 Mustang BBK  Underdrive Pulley Kit (Late 01-04) GT/Cobra 4.6
2001-04 Mustang BBK  Underdrive Pulley Kit (Late 01-04) GT/Cobra 4.6
2001-04 Mustang BBK  Underdrive Pulley Kit (Late 01-04) GT/Cobra 4.6

2001-2004 Mustang underdrive pulleys are easy bolt on horsepower and can be installed with simple hand tools. Pick your set up today from!

Item #BBK-1559
MPN# 1559

Everyday Low Price: $269.99

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  • Ford Mustang - 2001, 2002, 2003, 2004
  • Sub Models: GT, Cobra
  • Engines: 4.6
Made in the USA


  • More Power From Otherwise Stock Motor
  • Estimated 10+ Horsepower Gains
  • Made in USA
  • Installs with simple hand tools


  • Satin or "Clear" Finish Pulleys
  • Billet Aluminum
  • "Piggy Back" Crank pulley

 What's in the Box

  • (1) Set of 3 Under Drive Pulleys
  • All Necessary 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 a direct bolt-on replacement 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.

Identification Guide for 4.6L Water Pump Pulleys
Visually identify which water pump pulley you have before installing regardless of model year. The early water pump pulley
had a convex or ''bowed-out'' face and the pulley on the later water pump has a concave or ''pressed-in face''. There is no
exact changeover date for the pump and pulley. Supposedly the water pump changeover occurred in January of 2000, but we
have seen cars with identical January build dates and different water pumps and pulleys. We have also seen the early design
pulleys used on a few 2002 models,
Refer to the pictures below to determine which pulley design you have. Since there is no definitive answer as to the timeline
or model years.

Product Note
Does NOT include new serpentine belt. YOu Must reuse your original or purchase a new one.

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

  • Fits 2001-04 4.6L Mustang or Cobra after April 2001 or later design Water pump pulley.

    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

  • California Residents:
    Prop 65 Warning SignWARNING: Cancer and Reproductive Harm-

    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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