I went with the 2.5" PY down pipes and x-pipe kit for long branch and Dyno Ultras. Pipes went together in a day. That's taking off the old and installing the new(manifolds too, just turn-downs). Had to cut off a little to fit from the head pipes. Love the sound. Didn't seem too loud when finished but after all day of cruising my ears were ringing a bit. Oh and it's a coupe so I don't know about the brace clearance. I would recommend.
Robert