Summit Racing has introduced its High-Output 4-Pin HEI Performance Module for AMC and GM applications, aimed at delivering stronger spark output and reliable ignition operation. The release comes amid ...

Around 1975, General Motors made a significant advancement in stock passenger ignition technology: the High Energy Ignition (HEI). One of its major features was installation simplicity. The coil was ...

We can hear the howling already. "Why do I want to put some junk GM ignition on my (insert AMC, Mopar, or Ford)?" The answer is: Don't—unless you like the idea of a higher-performance, more-efficient ...