No problem, welcome. There are a lot of threads on setups, but I don't believe many people have 3" piping with the NA setup. There are a few who run the AAM 3" catback exhaust. I believe either setup has a 3" to 2.5" pipe converter to fit the 2.5" exhaust for the downpipe to test pipes or cats.
I know with the FI Twin Turbo setup the test pipes can be 3" or 3" to 2.5" downpipe so you can retain the existing exhaust. One of my friends has that setup on hers. It kept from having to buy a whole new CBE system.