I hooked up with TuneECU to see what the dealer installed and it was 20368 which is for after market exhaust. Looked at 20366 looks allot like 20368 and that is to much popping at decel for me thought the power was not as good as I was hoping for.
I see a modified 20366 at TuneECU's website that I am going to try.
Be aware that if you just put a Tune in it can be the case,even if you think it runs great, in the long run, that you spoil your engine.
Do a dyno run, cost a few bucks but you're sure then that the bike performs best and safe and a long time.