I'm curious about this as well, since I think I'd ratehr go for the interior design package than the M package - though I would like the exhaust. I'm assuming it's akin to the sport exhaust that used to be exclusive to the M package on the 650, so slightly louder than the regular exhaust but nothing like an actual M5 etc. If they were to actually put something with much of a rumble on the 7 I'd be surprised, though I'd be all for it.
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