HEI replacement coil offers increased spark energy when used with MSD HEI HEAT Module.
HEI owners now have a choice to replace their stock coil with the MSD High Energy Unitized Coil for GM HEI Distributors. This coil is a direct replacement of the stock coil and offers increased spark energy when used with the MSD HEI Module, PN 83647.
Direct performance replacement for GM HEI coil-in-cap distributors
70:1 turns ratio and lower primary resistance produce high voltage output
Full power sparks to 9,000 RPM when used with 83647 MSD HEI Module