I was riding to work this morning, ended up riding with a CBR 1000R for the majority of the ride, he had dual exhaust, 1 carbon fiber 2 brothers exhaust per side, not one of the new M2 or M5's that you see most people with, Im almost 100% sure that this was a full exhaust.
This was the deepest best sounding exhaust I have ever heard on a bike. period. I didn't even want to pull off into work, I wanted to follow him around haha.

Do 1000's usually have a deeper tone anyways?

 

yes they do