I have purchased over 30 sets maybe as much as 40 sets of HIDs. Buy a set off of ebay, they'll run you about $27. Get H6M, 5000k. Do not go with 6000 unless you just like the blue tint and want to look cool, if you want them for function go with 5000k. A $10 relay kit on ebay will save you a huge headache if you buy and install it at the same time. Go with the the slim ballast, not the slim ballast with the extra box, super annoying. I've put these in about 7 raptors, Denali, Escalade, 2500HD, F250, Jeep, 1500, Intrepide, and in a Honda accord. Hope this helps and sorry for the late response.