I changed my 2008 FLHTC to true duals (Fullsac/Supertrapps). I am selling my Factory Screaming Eagles and got a call from the new buyer of a 2013 Road King wanting to buy my SE mufflers. I told her I didn't think they would be a good fit for her bike as the back pressure may not be correct, but said I would research and let her know. Would my SEs work on the 2013 Road King? I'm thinking they would be best on 2007-2008? Or would they work on 2003-2008?