AEM Performance Electronics brings sophisticated electronic engine control & coil-on-plug ignition to the 5.0L Ford.

This is how the spark plug and ignition coil work together to start the car. Since they go hand-in-hand, you should have a mechanic check on your ignition coils when they change your spark plugs ...

Then, the high-voltage electricity from the coil returns to the distributor, where the rotor inside parcels it out to the correct spark plug to ignite the fuel/air mix.

The harness has the ability to mate to multiple subharnesses for injectors (EV1 or EV6 connectors), coil-on-plug or distributed ignition (including popular dual-sync distributors from MSD and FAST ...