Install the relay even if you think it is not necessary. It will isolate the hid kit from the AAM/EAM etc. HID kit does not like current coming from AAM, need straight 12v. This may cause unexpected issues. Don't pay thousands later in order to save a few bucks today.I fitted the hid kit today and works well,the only problem is if you use the auto lights it puts the esp light on when starting the car at night.I did not need a relay and have no flickering.