I successfully put in H7 bulbs in the foglights, which are H3s. Really, there is nothing to it. All you do is take out the actual bulb and chuck it. Get some H7 bulbs and do this. You place the bulb in the socket, and it looks like it won't fit. But, if you continue to push down on the base and work it from side to side, it pops in and will not come out unless you pull hard on it.

The reason I did this is that there is NO HID kit available for the H3 bulb. But since this works, you can get an H7 HID kit and put them in the fogs to match your HID bulbs in your headlights. I will be trying this shortly after I finish my "other lighting" project.....