Pipe sizes

[Obsessed]

I am going to just put mufflers on my car, but I do not know what the stock pipe size is. Anyone know?

Will probably be putting on a Magnaflow Street series muffler.

[trexturk]

Well I think mostly all magnaflow street series is 2 1/4 inlet.
I think the stock b6 s4 is 2 1/4 so it should be the same