With just a slip-on can and a K&N filter,you'll only have to go up 1(105) on the main jets. If you go to tfull exaust,Holeshot's stepped header will drop considerable weight,more power,looks good,but high mantenence keeping it looking good. Hindle/Brock full exahust wins the dyno tests, and even light than the Holeshot. Not sure,but it might be a bit more than the Holeshot too,or maybe that was just the ti. that was more .You'll have to investigate prices. You can log on to the Holeshot website ,And Katana John is a dealer for the Hindle Brock. I'm not sure what his web site is,but you can get it by logging on to the Bandits RUS site. I'm sure there are other options too,(Yoshi. maybe) but thats the route I would go. I have the Holeshot on mine,with the K&N pods,and a stage 2. If you go that route,plan on taking carb. jetting course 101. Either Dale Walker, or Katana John will help out with tunning advise. Hope this helps, Dan