Looking for A exhaust system for my 2007 road king, I currently have thunder cones installed on the bike and cant deal with the popping sounds it makes, I have installed A KnN intake, A power commander witch my shop said I needed to fix the backfire issue, did not work, want to buy A new exhaust system to make the popping stop but love the sound of the thunder cones, can I purchase A system that will be loud but not backfire