HEI Kit, MSD, Ultimate

GM 4-Pin HEI Ultimate Ignition Upgrade Kit by MSD®

A matched HEI coil and module improve high-speed coil charging.

This MSD® Ultimate HEI kit upgrades a compatible non-computer-controlled GM distributor using a matched high-output coil and HEAT ignition module. Their electrical pairing supports coil saturation at higher engine speeds. The module includes an externally adjustable rev limiter, and the replacement cap and rotor refresh the high-voltage connections. The kit supplies the cap, rotor, module, in-cap coil and dust cover; it is intended for the four-pin HEI arrangement rather than a seven-pin computer-controlled distributor.

• Non-computer-controlled GM HEI with a four-pin module • Matched high-output HEI coil and HEAT module • 8.5-amp module with externally adjustable rev limiter • Cap with brass terminals, rotor and dust cover included • Matched components support high-speed coil saturation