[Silverbolt]

Just buy an H3 size HID bulb... you dont have to buy a whole new kit... just buy the HID bulb itself.

You might be able to modify it to fit... I was thinking about this and it might work. I'm not in your situation, so I havent gotten into too much detail with measurements and all that. All I know is the H3s are alot shorter and smaller than H4s. So if you make a mount on the back of the projector housing, to hold the H4 HID bulb further back, it might work. The mount/adaptor has to set the H4 size HID bulb back enough to compensate for the difference in size. This might work... but I wouldnt try it. I'd just spend a little extra and buy an H3 HID bulb.