83647 Ignition Module

MSD's heat digital HEI module and performance coil will fire up your stock HEI distributor. The module is a direct plug-in for the 4-pin HEI module and will produce up to 8.5 Ampere of current. This increased energy will continue through racing RPM reaching 9000 RPM! The HEI module is extremely accurate in its delivery of this energy resulting in more accurate ignition timing. Another unique feature is an adjustable rev limiter. You can dial in an engine saving rev limit ranging from 5000 to 10000 RPM. To get the most performance out of the HEI module, MSD offers a performance coil as well. This coil drops right in place of the original, and fits under the stock cover.

• Compatibility - Stock HEI Distributors With 4 Pin Module
• 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 Ampere Of Juice!
• Adjust The Rev Limiter Without Removing The Cap!
• Easily Installs To Non Computer Controlled (4-Pin) HEI Housings