Thread: 1M exhaust drone problem
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      05-17-2011, 08:39 PM   #22
N55_BBM
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Drives: 2011 135i Coupe
Join Date: May 2010
Location: PA

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my 135i with the performance exhaust had the same drone you're describing.. i just but the resonator back and it took care of 90% of it. i miss the popping and gurgles tho, now it's just growly but doesnt pop
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