Ignition Coil, MSD, GM HEI, Replacement

GM HEI In-Cap Ignition Coil by MSD®

Replacement HEI coil supports higher spark energy with a matched ignition module.

This MSD® coil replaces the stock in-cap coil in compatible GM HEI distributors. Its winding design provides increased spark energy when used with the matching MSD HEI module. With MSD module 83647, the coil supports spark delivery through 9,000 rpm. It can also be used with a compatible stock HEI module.

• GM HEI in-cap coil; MSD 8225 • 42,000-volt maximum output; 0.31-ohm primary resistance • 70:1 winding turns ratio • Up to 9,000 rpm with MSD module 83647 • Compatible replacement for matching stock HEI coils