well, this is what I did. I have 99 Teg, so the regular headlights are 9006, I bought a pair off 9005. Now the difference between these 2 are, the 9006 have a coating on the end of the bulb so that the bulb isnt as bright. The 9005 have no coating so of course the bulb will be brighter. The 9005 will fit into the 9006 socket, with very little tweaking, i used a pair of dykes to trim the the part where the bulb locks into place on the headlight. Then you must modify the plug a little so that the harness will fit on there. If you want I can provide pics if someone wants. These bulbs are bright, i get people flashing there high beams at me, while driving at night.