I have vance and hines power duals and high out puts on my roadglide but im switching out to a d&d fat cat 2 into 1 do I need to remap my racetuner

 

Yes. You will be flowing more air, so will be running leaner and hotter.

 

When I bought my '15 RG bike I bought a street model that also had V&H high outputs. A tech showed me and let me hear the D&D fat cats on his '14 SG and man, what a loud obnoxious beast that was! curious if you've gone ahead and had the work done to switch out the pipes and remap.

 

not yet waiting on the guy to finish paying for the vance and hines exhaust but I will real soon

 

which apes did you go with and how much did it run you.