Chevy SBC Billet Aluminum Short Water Pump SWP Serpentine Pulley This is a preloaded unit

This is a preloaded unit allowing for a faster-reacting unit

These drives fit under your stock timing cover and come complete with instructions

and their quality construction and superior materials will help to protect your vital engine parts from the harmful effects of friction

flush-machined set screws for proper contact on the studs

they're guaranteed for life

Chevy SBC Billet Aluminum Short Water Pump SWP Serpentine Pulley This is a preloaded unitSpeedmaster aluminum crankshaft pulleys are manufactured from 356 aluminum that is heat treated to T 6 specs. These Speedmaster aluminum crankshaft pulleys help to increase horsepower by reducing accessory drag.