Looks insane! I would prefer bigger zorts though! Maybe a quad set like on the Shelby? Who can photshop some on there... Need to hear that roar!
The amount of pipes has no impact on sound, I will stick with dual pipes and either go with Ford/Borla racing full x-pipe exhaust as recorded and in previous videos in this thread as sounds very old muscle style.
Or might consider a full American Racing headers, x-pipe and catback setup a lot more money but equally a lot more power/torque and no doubt louder.
The beauty of the UK cars not coming for several more months is the Americans really are being guinea pigs with trying out exhaust as unfortunately so many of the nicer sounding systems drone really badly, so far the only exhaust guaranteed to not drone is the Ford Racing one, just happens to be one of best sounding also.