I have installed several Fuel Moto 2/1/2 jackpot head pipes and they are nice, can use factory heat shields, I have used several slip-ons, the loudest I ran was CFR'S but tuning them is harder, you loose a little low end torgue, and the drone on long rides did anoying, ran Rinehart Racing and they sounded nice and tuned well, and also used Fuel Moto Jackpot slip-on's they have a nice tone, and when on the throttle get a nice rumble, and they did tune real nice also. Depends what you are looking for, listen to different bikes before you make your decision. You also will need to do a tune after changing exhaust and AC