Ape, I disagree.
Two things are going on here...
The microphone on the camera is not a wide range mic, Most of them are not, So mainly the high tones are recorded and not the lows.
Second, A smooth sounding exhaust while under full throttle shows a balanced system. Like an indy car or a nascar you never here a lump of a cam or overlap, they sound like motorcycles. Unfortunately thats what you get with full flow, no restrictions and no un equal length pipes...
I bet up close it sounds great....
Todd Z