Looks great for one lap around the track, not so good for a multi-hour drive. Also, I hope this sort of seat comes with a racing seatbelt/restraint since the standard belt allows too much head travel with only a piece of hard carbon fiber behind your noggin in case of impact (unless the intent of the lightweight M3 is only to be used when the driver is wearing a helmet, which isn't likely since it is after all a sedan)..
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