I put them in my low beams and the fog lights. I'm really happy with them, they're bright as hell. The low beams were plug and play. The fog lights were a bit more involved, you have to modify the rear housing to get the wires from the new bulb through. It isn't that hard, it depends how anal you are about things. Finding somewhere to hide the ballasts took longer than anything. some people on here will bash the idea of hid's in the fog lights, but i like it.