I've had both. Dresser duals were total dogs for low end power loss but they sounded cool. Power dual is a very good peformer especialy on the rushmore bikes. I've seen dyno charts with stock rushmores with just power dual header with decent slip-ons and a very good tune yield over 100 ft.lbs of torque. And they will work well if you decide to do more upgrades later. Never scraped either pipe, floorboards scraped first. Sound/look cool or run good, the choice pretty much depends on your priorities.
Can you post a dyno sheet on the Cr 575 cam build.
I've always been a V&H fan as well. Have them on they dyna. However you may want to check out Rinehart Slimline Duals, they are like the V&H power duals, except without the large cross over. I have a set on my '14 SGS and they sound sweet.
Dressur duals. Cause I like the sound more. Is there a Power difference? Maybe, but I do know that there is a sound difference. Thats what I'm after. Stereo
Don't want to crash the party, but, I just bought a jackpot road and track complete 2into1 from Fuel Moto with a powervision tuner with a custom map and a air cleaner shipped for a little over $1100.00. Full stage 1 setup for under $1200.00 is out of sight. The 2/1 on my brother in laws 15 Street glide sounds good. And no pipe to drag on the left side anymore to boot.
Might be a little late but..... you might want to see who makes the best performing dresser / true dual systems. There are several out there. Another possibility is a system like S&S and Khome Werks make with a hidden chamber. Both pipes are supposed to run really good.