plz help - turbo muffler on N/A (future plans for FI)

Originally posted by VN-Tec
All of the above.. Hehhee... See youll need that back pressure.. Unless you have a hell of alot of of Mods To put pressure back into that 3 inch piping

even if i weld the 2.25" piping to the muffler's 3" inlet would i lose backpressure? i thought it wouldnt make too much difference? cuz i think thats the same muffler that comes with the full catback for my car.