Intellitronix GM HEI Power Feed Wire works with high energy ignitions (HEI) also known as electronic ignition systems connecting to your vehicle’s ignition.
The high energy ignitions have an ignition coil into the distributor cap and was used by General Motors starting in 1974. The system consists of a control module and a magnetic pickup mounted in the distributor. This eliminates ignition points and the coil wire.
The high energy ignitions can generate up to 40,000 volts.