I've got them on my 14, only with the power duals. Tuning is important as they are big open mufflers. Mine are still popping on decel after the first tune/dyno. Other than that they run and sound good.
I have power duals and High Outputs on my 103", managed by a Power Vision. They sound great, but if I were to do it all over again I'd go with a smaller s/o. You will lose some bottom end torque with those ultra free flowing mufflers. What you lose on the bottom end you gain on the top end, so it comes down to what YOU want out of your set-up.
Here's another option, Cobra Powerport Headpipe and CFR'S, that's what I'm running on my '14 FLHX, also what I ran on my 09 FLHT with a 103ci Stage 4, I think you would be pleased with either set-up.