The S&S SPO's aren't meant to be run with any kind of true dual set up, believe me, I know!
With that said, they are ok for the stock head pipe. I have also gone thru too many sets of slip-ons to keep track of and what I have on my bike now seems to have done the trick.....for now
I am running the Fullsac true dual set up with a stock set of CVO mufflers from an 07 Screamin' Eagle CVO Road King on my 03 Road King with a stock 88" and big sucker air cleaner with a DFO. These pipes are quiet but really flow a lot better than stock pipes. Plus the 4" dia can and heat shields don't look half bad either
This set up might not be for everyone, but I was looking for quiet and good flow and I may have found it. I have run Supermeg 2 into 1, Screamin' Eagles, S&S SPO, WIld Pigs, Harley touring mufflers, Fullsac touring and also Fullsac standard re-cores and they were all too loud. Well, all of them except Harley's touring mufflers. Your mileage may vary but it works for me. I can ride all day and actually enjoy it because of the lack of noise.
