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Obsessed
06-01-2007, 06:34 PM
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
06-01-2007, 08:25 PM
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