Mallory HyFire HEI Module

Bring your GM HEI (high energy ignition) coil-in-cap to life! This high-output HEI module from Mallory offers more performance and features than any other module available: easy-to-adjust rev limiting from 4000 to 8500 RPM, special extended dwell circuitry for a hotter spark over a broader RPM range, and reduction of high-RPM retard common to other HEI modules. Works on 4, 6, and 8-cylinder coil-in-cap distributors with 4-pin modules.