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      08-05-2019, 12:52 AM   #6
Vanosman
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Drives: 2013 e93/2014 F10/2004 M3 Conv
Join Date: Apr 2009
Location: Oklahoma

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try a real bov charge pipe kit, they have stiff springs to control the boost surges better and most are adjustable at top so if you have overboost then you can dial it down and vent along with your WG ( when you are WOT you would hear the sound that you describe). Plastic diverters are not popular for good reason.
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