Then i think 4" TB, no cat and muffler or not would be good.
That's kinda what I'm looking at. I will be buying a 5th wheel camper soon and pulling it some with possibly a chip or programmer but not drag racin or nothing. I think just removing the cat and muffler on a stock pipe would probably give you what your looking for for cheap!
I've alread instaled my cold air intake (Airaid filter) and now going for the exhaust and some gages.