Moroso ProCoil HEI ignition coils are direct replacements for the distributor-mounted stock HEI ignition coils found on a large number of '70s and '80s GM products. Their low-oxygen, high-conductivity windings and special high-silicon core combine to deliver high current and long spark duration. Aside from the improved idle, better acceleration, and more power that come from the stronger spark, these coils also provide power beyond the "6,000 rpm barrier" of stock systems.
