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You guys are so worried about active sound... Coming from an M5 owner, it is totally inconsequential. I don't notice it, if anything heck I'd turn it up! Turbo cars are quiet! And if you do downpipes, the active sound will be overwhelmed anyways.
In addition with the exhaust valves, you'll be able to put in an aftermarket switch that can control the characteristics of the flap so that they stay open all the time and not just open at 3500rpms under load. That made a small but noticeable sound boost on my F10 M5.
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991 Turbo
993 GT2 Outlaw
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