IF you want more power, then as suggested, get a different bike. It'll just be easier. If you want a little more torque, drop a tooth on the countershaft so that the power it has is more immediate. Adding mufflers is mostly going to just make it louder. If you reflash the ECU, that will help with fuel delivery and throttle response, not add power.
As far as I know there are no Vee's that have been flashed. No data or charts to compare.
2012 DL1000 Adventure (Tinkerbell)
PC-V, TRE, CR8EIX , ECM, K&N, RDL, PR4, PC-8, EB H4, WERKS, Madstad 22", 17/43 gearing, [COLOR="Navy"]AdventureTech: Fork brace, shelf, mirror extenders, SpeedoDRD, wheel spacer, Head's-Up voltage monitor, [/COLOR]Goldwing pegs, Sonic 1.1, Wolo Bad Boy, ExTuff Helmet Hook.