Thread: M550 exhaust flaps open = much better sound
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      11-05-2019, 07:56 AM   #101
riskmaker76
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Drives: 440 xi MPPSK JB4
Join Date: Aug 2016
Location: Socialist People's State of NY - Long Island, NY

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My 440 is a 2017 and if I put it in Sport or Sport plus my valves stay open all the time...
So your all saying that your valves dont stay open in these modes except for MY2020?
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