Chevy SBC Billet Aluminum Short Water Pump SWP Serpentine Pulley Features a high-carbon steel ring

Features a high-carbon steel ring gear for enhanced durability under extreme conditions

They work under the same principals as OEM tanks

turbocharged and nitrous applications

flush-machined set screws for proper contact on the studs

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

Chevy SBC Billet Aluminum Short Water Pump SWP Serpentine Pulley Features a high-carbon steel ringSpeedmaster 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.