The carbon rotor button in a stock HEI distributor cap has very high resistance. When the high voltage of an MSD 7-Series Ignition is added, this resistance builds up heat and can actually melt the distributor cap. The solution to this problem is the use of the MSD Low Resistance HEI Bushing which will pass the secondary voltage from the distributor cap to the rotor without excessive heat buildup.

More From This Category

MSD Camshaft Sync Pickup Kit, Replacement Hall Effect Pickup, with LED, Kit

MSD Camshaft Sync Pickup Kit, Replacement Hall Effect Pickup, with LED, Kit

$229.13

MSD Distributor Weight, Kit

MSD Distributor Weight, Kit

$48.48

FAST XR3000 Points Replacement System for 4, 6 and 8 Cylinder Domestic Engines

FAST XR3000 Points Replacement System for 4, 6 and 8 Cylinder Domestic Engines

$311.48

MSD Distributor Hold-Down Clamp, Steel, Black, Stud Mounted, For Ford, Each

MSD Distributor Hold-Down Clamp, Steel, Black, Stud Mounted, For Ford, Each

$168.97

MSD Cam Sync Pickup Kit, Each.

MSD Cam Sync Pickup Kit, Each.

$349.57