Thread: M550 exhaust flaps open = much better sound
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      12-16-2020, 06:27 PM   #129
dlf750
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Drives: 2019 BMW 540i M Package
Join Date: Aug 2017
Location: Chicago

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2019 BMW 540iX  [0.00]
2007 Ferrari F430 S ...  [0.00]
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2010 BMW 335iC  [0.00]
ya know... I forgot why I didn't do this mod last year...I don't believe it works using this method on a 540, only a 550... crud. thanks gang!
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