Turbo Inlet Sizes?

[DjLiquid]

Im looking into either making or purchasing (from another make of car) some chrome aluminum intake piping just to give the engine bay a nicer look and make the air a little more free flowing. I was wondering, how wide is the diameter of the inlet on the T25 compressor housing and also, same with the T28? I want to upgrade later on this year and was wondering if I can swap turbo's without changing the piping. If they are different sizes then I'll just custom make something.