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 Mechanical Advance Lockout, for , Circle Track HEI, Each

MSD Mechanical Advance Lockout, for , Circle Track HEI, Each

$46.01

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

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 Vacuum Advance Lockout, for Distributors, Each

MSD Vacuum Advance Lockout, for Distributors, Each

$30.58

MSD Ignition Control Module, Ignition Controller, for PN [8452/8453/8456]

MSD Ignition Control Module, Ignition Controller, for PN [8452/8453/8456]

$194.17