When I posted a similar question, Bikeaholic said no. Since then I have talked to dealer mechanics, read all sorts of internet pages and talked to different pipe manufacturers. All pipe manufacturers suggest remapping, but if you talk to their staff long enough they eventually confess. As for everyone else, they say as long as you don't mess with the air intake you should be fine. If you do want to remapp I hear the dealer can help you out or you can just get a power commander. By the way (fire/emt) what changed your mind from the hard krome? They are solid pipes and if they had their quiet baffels out yet they would be my first choice. But since they don't come out till december they aren't an option for me. Hope you enjoy whichever pipes you end up with. I hope I enjoy the ones I end up with too :lol: