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. 14 Tooth Fuel Pump Drive Pulley. Features 3/8'' Pitch and a 1'' ID. Dimensions 5.5 x 5.5 x 2.75 in.