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      06-07-2024, 03:55 PM   #7
Thumbie
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Drives: 2011 M3/4/6
Join Date: Sep 2021
Location: SF Bay Area

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Any muffler/catback less than 95dB measured from 20" away is CA legal (California Vehicle Code 27150.1(a)). Although if it's close, I doubt most smog places would actually care.

I'd leave your OEM midpipe if your worried about passing inspection.
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