Took my headlight assembly apart on my Boss today to see what it would take to change it to a halogen bulb. After looking at it I found that the 9003 halogen (60/55w) went in with no adapting. Simply undo spring clip, take out old bulb, place halogen bulb in and plug it in. That's it. It is an exact fit. Light looks really intense white, I'll find out tonight for sure. The bulbs start at $5.99 and up. I went with the cool blue xenon for $12.50.