To replace stock headlights, I couldn't find anything that works right with HID. There is always the option of getting real HID projectors from a newer car and cutting up stock lights to graft the projectors in. This works, but is a pain to seal and I've never seen a cheap source for parts. The depth can also be significant enough to require even more mods to the vehicle.
On both my van and car I gave up on HID ended up with new housings, heavy wire, and relays. The minivan is so bad I had to go up to 80/100W bulbs to even have safe light output. The color temp is right, the pattern is right, the brightness is good, it just isn't as cool or efficient as HID. I get over 13V to the bulbs and it isn't nearly as good as the lighting in the K5. The K5 has the small 89-91 sealed beams with good wiring and relays. The lows stay on when the high beams are on. I can see road signs over a mile away, the trees, the ditches, the fields...
If you have room for lights mounted on the bumper or something, then there are more options since you can start from scratch with HID off-road lights.
On both my van and car I gave up on HID ended up with new housings, heavy wire, and relays. The minivan is so bad I had to go up to 80/100W bulbs to even have safe light output. The color temp is right, the pattern is right, the brightness is good, it just isn't as cool or efficient as HID. I get over 13V to the bulbs and it isn't nearly as good as the lighting in the K5. The K5 has the small 89-91 sealed beams with good wiring and relays. The lows stay on when the high beams are on. I can see road signs over a mile away, the trees, the ditches, the fields...
If you have room for lights mounted on the bumper or something, then there are more options since you can start from scratch with HID off-road lights.

