I did the H-4 conversions on mine. I had to slightly modify the headlight bucket to get it to set in there right and then build a wiring conversion so that all 4 headlights weren't always on. Some of the dealers send this conversion with them, you just simply plug it in to your exsisting harness then into the back of the bulb. It works great and I have the diamond cut housings on the low beams.