This all new Heat HEI Module supersedes the current PN 83645. Using upgraded components, the HEAT 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.
Works with non-computer controlled (4-Pin) HEI housings.
- 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 7.5 amps of juice!
- Adjust the rev limiter without removing the cap!
- Fits in stock HEI distributors
547-83647 Instructions (PDF)
MSD Tech Bulletin (PDF)