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I have the CP-E from the downpipe back with non-resonated mids and it drones a little when I'm accelerating. But at a consistent 2-2.5k on the highway it is definitely bearable, and with music on, I can't even hear the exhaust.
Mine is also a MT so that could be a difference. Love the sound though.
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2016 i8 Protonic Blue, Giga Amido
2011 535i Msport
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