I have a stock 2011 busa. When I finally make it home from this deployment I am going to spend some of my hard earned money on the bike. I have been looking and looking for a full exhaust system for the bike. I have come across a Leo Vince SBK Factory EVO II Full Exhaust System. They claim that I don't have to do anything with the fuel management. Question, does anyone know if these are worth it or not? I am also looking at a full Muzzy system as a back up. Any information would be great. Forgot to explain, that I have a 1200 budget for exhaust, fuel and filter. Thanks again.