I've got a milltek 2.75" cat back system with a 100mm tail pipe and want something louder to swap with it. It fits newage imprezas up to 05 for definite. With a 3rd cat decat (not included) pipe it sounds pretty good on the outside - but quiet on the inside. I'm after something a bit different but still stainless and previously had a Prodrive bb with TSL de-res centre section which wasn't loud enough. I'm in the east midlands.