BBK 85-97 GM Truck 305 350 Underdrive Pulley Kit - Lightweight CNC Billet Aluminum (3pc)

You get a full set of underdrive pulleys in this kit, which means one box handles the whole upgrade for your engine's accessory drive. This BBK Power-Plus Series kit is designed for 1985-1987 GM trucks and F-bodies with the 5.0L or 5.7L engine. By slowing down accessories like the water pump and alternator, these pulleys reduce the parasitic drag on your engine, freeing up horsepower that would otherwise be used to spin them.

These pulleys are made from CNC machined billet aluminum, making them lighter than the stock cast iron or steel pulleys. This weight reduction further contributes to improved engine output, and the kit includes the crank, water pump, and alternator pulleys along with all the necessary hardware. BBK designs these as direct bolt-on replacements, so you can reuse your existing serpentine belts and maintain proper cooling and charging system function. It's a solid way to get a noticeable performance boost without major engine modifications.

This kit is designed to fit a wide range of GM vehicles from 1985 through 1987, including many popular truck models and the Camaro and Firebird. Make sure to check the fitment list to confirm it's right for your specific application. Please note that this part is not CARB approved and cannot be shipped to California.