I have the SEII's on my 2006 1200XL, and I really like the sound of them as compared to straight pipes. Nice burble with low end, whereas straights tend to be very biting and harsh. I do have the SE air filter and a re-jet, which in total is a stage 1. To add just one component (pipes or air cleaner) you do not have to re-jet or adjust. On a newer bike, the fuel injection should adjust to cover it just fine.