1st system:
4" down pipe, 5" back to the Donaldson 5"in/5"out Silent Partner muffler and a 5" tail pipe.
2nd and current system:
4" from the turbo to the Donaldson 4"in/4"out M090544 muffler, stock tail pipe and 5" tip.
If I had to do it a 3rd time and since I was looking to improve flow and not noise I would still do what I have now.
Interesting post, weren't you looking for particular configurations vs manufacture names?