Thread: BMW PE
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      02-21-2013, 11:32 PM   #8
Volasko
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Drives: 2006 E90 330i BSM 6MT ZSP
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Quote:
Originally Posted by Johnny D View Post
I'm referring to any "change in sound". I could see it if it was a packed muffler, but if it isn't, I don't see how that would happen.
It is packed, thats why you have the break-in period.