Can I come out of the corner now?

, Is it that extreme of a change when you swap cans? I thought it just helped the engine breath better.... but other than that exhaust doesn't really affect how the bike runs. For maximum performance you need to rejet... and other than that exhaust really doesn't do much for the entire system except get exhaust out faster and complete a closed combustion system for required back pressure???
I am willing to be wrong on this, just inform me how so I can get out of the corner!