I have a set of mufflers on my 06 Ultra I think they are Screaming Eagle or Rush slip ons. They have the number HD 65936-03 on them I have found the number 66156-08 is the Screaming Eagle number. they have removable end caps. Does any one know if they have changable baffles They are quite and i would like to make them a little louder without going real loud. Any help would be great thanks GBSB