NEW REPLACEMENT MODULE FOR GM STYLE HEI DISTRIBUTORS. New OE style replacement 4 Pin module for use with the GM (Chevy, Oldsmobile, Pontiac & Buick) Large Cap distributors. Will also work on aftermarket FORD & Mopar HEI distributors that have the large GM style cap (coil-in-cap). These are for carbureted vehicles. Dielectric grease is necessary for installation and is included.