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I thought the driving mode selector affected how often AFM kicks in? (like Eco is pretty much all the time and Sport/Track are much much less?) If correct, that would be great for city driving. On the highway, I wouldn't mind. I've driven my fathers L99 on the highway and didn't notice a thing with the stock exhaust. From what I understood from the reveal and all the tech, is that they are taking the vacuum-valve-exhaust idea beyond just dual-mode and using it to cancel out AFM drone too.
Maybe I understood it wrong, but I hope that's the case.
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