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      10-16-2015, 11:27 AM   #7
Patrón
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Drives: '15 M4
Join Date: Sep 2013
Location: San Antonio, TX

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2015 BMW M4  [0.00]
2009 BMW M3  [10.00]
Quote:
Originally Posted by m5q8 View Post
no i was not i am too busy and they took like a week to customize the exhaust
someone had a similar knocking noise that was vacum line under the manifold/connected to bypass valve...research this forum and see if it pops up, he even posted a couple of videos so we could hear the sound. to be honest, your knock sounds pretty bad. how that came about from changing the exhaust is pretty questionable, that is why i asked if you were there during the install.
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