My '13 had the cat in the headpipe right next to my foot, a long one day ride home from TN in 95-100 degree heat made me decide that it had to go. I'm happy I did it, but it got expensive.... Fuel Moto headpipe and Powervision went on. The cheap slip-on mufflers that sounded just right with the cat were much too loud and sounded like crap. Tried the stock mufflers, sounded like crap (weird drone at cruising speeds). On went V&H Monster Rounds, much better, nice tone and not too loud. But that was over $1600 in parts like 6 years ago, probably more now. Still, bike now runs cool, sounds good, maybe it's got a tad more pep. Maybe not. Some mid-range torque cams and a proper dyno tune are probably coming in the near future. The Powervision autotune is ok, but I feel like there is more to be had.