Aside from the cooler right cheek, what are the pros and cons of true duals on an '05 FLHRi? I picked it used and know it hasS&S gear drive cams (went to inspect the tensioners and found gears!!),but I haven't got the info the cams from the previous owner yet. Also SE air cleaner and stage one with under sized comp sproket. Are there issues with unequal back pressure? do you lose or gain on HP and torque? I'm considering going to true duals and wonder if they are really worth the bother.