BBK® 1598 - Power-Plus Series™ Underdrive Pulley System

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Power-Plus Series™ Underdrive Pulley System (1598) by BBK®. Gain 8-15 horsepower in just 30 minutes by bolting on this Underdrive Pulley Kit. It directly replaces your factory pulleys, won't affect your charging or cooling system, and your existing serpentine belts can still be used. Available in your choice of CNC machined high quality polished aluminum or powdercoated black steel, this kit comes with hardware and instructions.


Material: Aluminum
Finish: Polished


  • Reduces accessory drag for increased power to the rear wheels
  • Includes, crank, water pump, and alternator pulleys
  • Bolt-on replacement for factory pulleys, won't affect charging or cooling system
  • Custom designed for each application and tested for maximum performance
  • Allows use of existing serpentine belts
  • Available in CNC machined high quality aluminum or powdercoated black steel
  • Bolt-on installation takes less than 30 minutes
  • Includes hardware and instructions
  • Proudly made in the USA

There are 2 ways to get your car to go faster: modify the engine to make more power, or reduce the engine's workload. The latter has been traditionally accomplished by lightening a vehicle and/or making it more aerodynamic, so the engine doesn't have to work as hard to pull excessive weight or overcome drag, but you can also decrease the engine's workload by reducing so called "parasitic drag" with this Underdrive Pulley Kit.

Along with driving the vehicle, your engine also has to drive various accessories via the serpentine belt, which consumes horsepower. By reducing this "parasitic drag", you can make more power available to the drive wheels for increased performance. This Underdrive Pulley kit has been carefully designed to rotate accessories at a slower speed, but without affecting charging system output, cooling system capability, or adversely affecting any other system. Your vehicle will operate normally except you'll have an extra 8-15 horsepower for better acceleration and passing power.

Custom designed for the application, this kit is a bolt-on installation and direct replacement for the factory pulleys; you can even use the same serpentine belt. The pulleys are CNC machined from high quality aluminum and polished to perfection or formed in steel that's been powdercoated black. The kit comes with hardware and detailed installation instructions. The BBK Underdrive Pulley kit is backed by a 1-year limited warranty against defects in materials or workmanship, as long as the product was installed according to BBK guidelines.

BBK Performance® is the No. 1 manufacturer of EFI performance parts and accessories. For over 20 years the company has concentrated its resources on the development and manufacture of performance parts and accessories for late model electronically fuel injected vehicles. These parts include large bore, high-flow mass air meters and throttle bodies, intake manifolds, high-flow fuel rails and high-volume fuel pumps, and cold air intake kits. The company also manufactures an extensive line of high-tech headers and exhaust pipes, and state-of-the-art suspension and steering components. Along with their commitment to EFI, the company is also dedicated to designing and manufacturing the highest quality parts and accessories right here in the USA. To that end, the company operates 2 large design and manufacturing facilities in Temecula, California as well as a large distribution center located in Daytona Beach, Florida.

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All BBK products, including CAI systems, air filters, exhaust systems, headers and other products, are warrantied against any defect in materials or craftsmanship for a period of one year from the date of purchase.

These terms apply as long as it has been established that the product in question was installed and used in accordance to all BBK guidelines and was not used for racing or competition purposes.

BBK Performance will not be held responsible for any consequential or incidental damages incurred during installation and will not be held responsible for any incidental or additional labor/storage charges on any products that are defective, damaged, or purchased incorrectly. (Please note some product specifics are NOT covered by warranty, such as coatings/finishes, bushings and hoses, etc.)

An original receipt showing the date of purchase must also be supplied or the warranty is null and void – please be sure to include your name, return address and contact phone number. If a defect is determined, the item will be immediately fixed or replaced at no cost to the consumer.

Magnuson-Moss Warranty Act:
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More

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Low Prices Price match guarantee
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