Aeromotive 21101 Billet Crank 34% Under Drive Pulley for LT1 Engines with Serpentine Belt - Performance Upgrade for Racing & Street Use

Aeromotive Inc. is a true high performance aftermarket manufacturer specializing in fuel delivery and fuel delivery components. Utilizing aerospace tolerances and procedures, three generations of track experience, and a meticulous approach to engineering, Aeromotive Fuel Systems has become the absolute pinnacle of performance fuel delivery. Billet aluminum, 34 percent Underdrive Pulley. Designed for use with GM LT1 Crank.