MSD HEI Ignition Coil Throttle Return Spring and Bracket Kit Piston Notching Tool

Piston Notching Tool

Bright white background makes reading the gauge effortless

2-1/2 in Tailpipe

Adjustable Speed Limiter

MSD HEI Ignition Coil Throttle Return Spring and Bracket Kit Piston Notching ToolHEI owners now have a choice to replace their stock coil with the MSD High Energy Unitized Coil for GM HEI Distributors. This coil is a direct replacement of the stock coil and offers increased spark energy when used with the MSD HEI Module, PN 83645. The coil features special low inductance, high temperature windings which charge faster to give you increased spark energy at higher rpm. The premium epoxy filled construction is designed to withstand