JET Performance Underdrive Pulley Kits are manufactured from 1-piece billet aluminum. They will give you an additional 10-13 hp by reducing the drag placed your vehicle's engine to drive accessories such as A/C, power steering, and water pumps. The kits will slow down the accessories and will allow the engine to turn with less effort, increasing horsepower, fuel economy, and improving your acceleration. The pulleys will not effect adversely the operation of the accessories! The installation process is quick and simple.

Jet Performance was founded over 45 years ago, and started as an engine building and carburetor shop specialized for Drag Racing vehicle applications. Since then, it has held multiple IHRA and NHRA national records in 3 different classes, and has successfully developed and tuned carburetors and fuel systems for some of the top names in Drag Racing, Nascar and Off Road racing! Jet Performance offers consumers a wide range of innovative and high quality products which will work with almost any vehicle, and guarantee to help you realize your vehicle's true power potential!