I read a thread on here the other day about converting your stock 9004 bulbs to the brighter 9007 bulbs. I got some really cheap bulbs off ebay to try it with to see if it would be worth an investment of some quality bulbs. I also bought a set of wiring adapters that switch the wires over for the conversion, so all i have to do is plug it in and go. After reading some other headlight threads, i wonder if i need to wire some kind of relay in to make the conversion work. I want to get it right the first time so i dont burn anything up.