Hi,
No real drone at all, in fact between 80 and 100 mph on light throttle you can hardly hear her at all, but my mate reckons it sounds like a super car when I over take him....!!!!
It has 4-2-1 mild steel manifolds, in to twin 2.5" stainless exhaust with an X-pipe and finally into a scorpion M3 rear box..........