They are H4 bulbs. Before you buy, ask the seller if they are true hi/low beam HID bulbs or if the high beam is halogen. The halogen high beams are completely useless, dimmer than old burnt up low beams. I got screwed, oh well only $30. You will be happy with the 6000K spectrum. Good luck.
ok so the bulbs are H4... If u plan to buy a kit please do NOT get them on ebay bc most of those are cheap and my friend got a pair and they are aweful and overpriced.
I got mine from DDM Tuning and several members have them also and there are so many threads about HIDs on here and i will always recommend that u try them since they are good HIDs and are cheaper then anyone else that ive seen.
I was just at DDM Tuning today. Good guys. I was in the Huntington Beach location. They took care of a problem I was having with the fog lights. The place was very busy. Most of the guys are driving small import cars.