Diablo, I changed everything. I used the PIAA 1552's, and they fit perfectly in the stock location. I went with these because no one made a superwhite 899 bulb, and I like the looks of the PIAA superwhite's. Since then, someone has found a manufacturer of what they claim to be a "hyper-white" 899, but not sure what type of product they produce. The PIAA's are more expensive, but you are paying for the quality and performance. I wired them up to use my stock fog light switch to keep things looking simple. You probably have the 899 bulbs also, which leaves you pretty limited on what you can swap the bulbs out with.