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      12-29-2012, 03:15 AM   #3
Tiago@VRSF
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Drives: E92 335i, F30 328i, F82 M4
Join Date: Dec 2007
Location: Hudson, MA

Posts: 7,120
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The downpipes are either hitting the subframe or you're experiencing wastegate rattle.

My money is on wastegate rattle.
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