Racers running a stock HEI often develop a high engine-speed miss around 5,500 rpm that essentially acts as a rev limiter. The HEI can't develop enough ignition energy to properly fire the spark ...

Our replacement components included a new performance coil (PN 29215), which is effective up to 7,000 rpm, a rotor (PN 362), and a Hyfire HEI module (PN 699).

The Super HEI Kit-which is a smog-legal modification, by the way-allows you to retain an already installed HEI distributor. Depending on the type of module you're running (four-, five-, or seven ...

The HEI distributor is still an inductive-discharge ignition, but exchanges points for an electronic device called a module.