I been trying to do some research, to see what the difference is in the coupe vs. sedan bumpers, but haven't been successful. I was thinking I could just buy the coupe bumper and headlights. But I guess just buying the STI lip, and trying it first would make more sense. Definitely let us know how it...

Does that STI lip fit the sedan bumper as well?
Also how is it mounted (3M tape, or screwed in)?