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550i exhaust tip removal
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02-13-2012, 10:30 PM
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5fix
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Drives: 2020 X5 40i; 2018 m550i
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If you read the thread, someone posted a link to another thread that explains the function of the butterfly valve on the mufflers. Several people have posted about blocking the valve open, with the only result being a bit more exhaust note.
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