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      09-03-2012, 07:16 PM   #7
Zebra99
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Drives: 2011 335is E93
Join Date: Aug 2011
Location: Ontario

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Quote:
Originally Posted by Beemw335
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.
I highly doubt anyone who just bought a PE would want to cut theirs open lol....

I'm sure there is a better way to figure out the internals of the PE. Anyone have access to specs/design graphs or internal maps for this purpose?