Thread: Backfiring after JB4 ISO firmware update?
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      12-16-2012, 04:36 PM   #8
1stockbmw
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Drives: 2011 E90 335i PE
Join Date: Jul 2009
Location: Woodland Hills, CA

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2011 BMW 335i Perfo ...  [0.00]
Yup mufflers are deleted. I just love the sound haha. Oh and also I still have the stock downpipe so I am not running a catless set up, its just the muffler delete.
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