if you get brp's hid and fog lights you do need a different harness from brp and that by itself is 100bucks. brp's hid is so expensive anyway.I purchased my spyder and the fog lights were installed already, I am upgrading to the BRP HID's and was wondering, since I didnt install the fogs myself, did they give you a prewired wiring harness. I am wondering if the BRP HID and FOG light used in conjunction, if its a completely new wiring harness. :dontknow: