MSD 83647 Heat HEI Module

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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: Easily installs to non-computer controlled (4-Pin) HEI housings Built-in adjustable rev limiter can easily be set externally Advanced dwell control for improved high rpm output The Hottest HEI Module you buy-period! Produces an incredible 8.5 amps of juice! Adjust the rev limiter without removing the cap! Fits in stock HEI distributors Show more