Using upgraded components, the HEAT HEI module produces high output for stock and MSD applications plus has a built-in rev limiter that is more accurate and easier to set with the engine running.
Features:
Fits in stock HEI distributors
Adjust the rev limiter without removing the cap!
Built-in adjustable rev limiter can easily be set externally
Advanced dwell control for improved high rpm output
Easily installs to non-computer controlled (4-Pin) HEI housings
