I would have to get an entirely new exhaust. That is why I am trying to find out if it is worth it. I would like a slightly louder exhaust anyway so I'm looking into replacing the whole thing from downpipes and back. I can either go for a better JDM exhaust or I can get a USDM exhaust.
My only question for a USDM exhaust is whether or not it will fit my TT 2+2. I don't know where it gets longer. I would hate to find my new pipes don't reach my H-pipe. Is it longer before the cats or after the cats in the muffler area? Will a set of downpipes and test pipes work or do I need to replace the whole thing?