Alright I want to get these headlights for my 05x and I was just wondering if I can literally just pop the old (factory) headlights out, the whole thing, and just put these new ones in? I know there obviously more to it but I'm taking it to my buddy who's a machainc so that's not a problem I'm just wondering if it's possible to do that because underneath the picture of the headlights I want it says that it fits my car, INfiniti 2005 sedan, but it also says with factory hid headlights. I have no idea what that means. Whatever you guys know helps so please help me out I don't want to spend 400 on something that isn't going to work.