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.

Product 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 w/o Removing The Cap
• Fits in stock HEI distributors