No, this is a standalone unit. You unplug your 3 harness’s from the factory ECU and plug them into the EMS. Load up your map and woo-laa all done. If you have someone else w/ the same mods ect… you could prob just snag their map if you have a wideband installed for safety.
-Actually, you would unplug your 3 harness’s, plug the adapters into them, then plug in the EMS.
What motor is in your car? F series?
What AEM box are they recommending you to use with the conversion harness?