Ignition Control Module - MSD

Allows Adjustment Of rpm Limit 5,000 to 10,000 rpm, True High-Performance Modules Built For HEI Distributors, Produces 50% Higher Currents Than Stock Modules, Faster Coil Saturation, More Spark Energy At Top Speeds, Increased Horsepower & rpm Range Improved Starting, Plug-In Modules Create Potent High-Energy Spark To 10,000 rpm, Modules Replace All 4-Pin Modules Used In HEI Distributors w/ Vacuum Advance Canister