I posted this issue in another forum but have so far received very little feedback, so please don't mind me if you have already read this:

Please forgive my technical illiteracy. On the new 2008 Yamaha Tenere, can someone please explain to me why there are two pipes coming from the engine case? From what I can see, it seems to be a 2-in-1 system given the stock exhaust which is a giant flat box. So if I change that exhaust into a Akrapovic or GPR that looks like it splits from the single pipe into two separate pipes that lead to two separate exhausts:
1) would that become a 2-1-2 system then, 2 from the head into one pipe then splits into two again?
2) would this setup give a better airflow and hence slightly more power than the stock setup?
3) someone on this forum said about just keeping one pipe to one exhaust, would this one-pipe-one-exhaust setup be better than 2-1-2?