The fog light gets replaced with an HID 880 bulb. I hid my ballasts in the fenders after doing a bit of elongating of some of the wires on the harness it came with. I have the harness for the headlights and not the fog lamps. Nothing else is needed at all, I recommend getting the harness, just to make sure your not putting any added strain on the GP's stock wiring, although I'm sure you would be fine without it. As for which bulb to get for the headlights i am NOT positive for those headlamps but i believe it is the H1 bulb. Installation is really self explanatory once you lay everything out. I can take a few pictures of where my ballasts are mounted but it won't be for about a week. Let me know if you have any more questions! Oh, and here is a link to a few of my pictures with the HID's installed. Pictures by chamilton89 - Photobucket