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      05-03-2017, 04:41 PM   #26
cngo
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Drives: W07
Join Date: Mar 2014
Location: CA

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I had a downpipe installed on my F30 335i at a local exhaust shop and ever since then I've been experiencing some pretty severe vibrations, but only at certain RPMs. I brought it to another local exhaust shop but they claimed they didn't see anything that could be causing it. Would you guys be willing to diagnose what may be the cause of the vibrations?