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M550 exhaust flaps open = much better sound
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11-05-2019, 07:56 AM
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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?
Appreciate
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riskmaker76
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