The fiberglass housing that encloses that holds the light assembly needed to be drilled to allow thick HID wires to pass thru. Also, i had to change the connectors inside the housing to match up with my H3 bulb. I replace all 6 bulbs with HIDs color(4300k) 35watt while I had the bumper off. I ended up having to remove the light housings to install the high beams. I broke one bulb trying to do the quick way.