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      09-03-2012, 02:38 PM   #6
Drives: 335i
Join Date: Mar 2011
Location: My car is my home

Posts: 2,016
iTrader: (2)

Pe, 335( is) and oem all have the same muffler box, so the sound difference comes from packing inside and how much of the perforated pipe is covered up.
Whoever has a pe and doesnt mind cutting it open will do all of us a favor since we could then see what to do to ours in order to make it sound alike.
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