Product DescriptionGM HEI 4 Pin Ignition Control Module 1974–1988
Works on all GM (Chevrolet, GMC, Buick, Cadillac, Pontiac, Oldsmobile, etc.) made from 1974–1988 that take the 4 pin style ignition control modules. Easily plugs into the distributor. Maintains perfect spark up to 7,500 RPMs. Protects against coil overheating. Works great with high energy ignitions.