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435gc · 03-16-2021, 04:16 PM

I have the plumback and it is quieter than stock even with my bms intake.

With stock and the intake I would get the swoosh sound. Now its barely perceivable.

03-16-2021, 04:16 PM	#15
435gc Lieutenant 174 Rep 461 Posts Drives: 2015 435i Gran Coupe xdrive Join Date: May 2019 Location: Charlotte iTrader: (0)	I have the plumback and it is quieter than stock even with my bms intake. With stock and the intake I would get the swoosh sound. Now its barely perceivable.
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