Advice please, what slip ons would fit a 2015 Fatboy, I want the 'harley sound' but not the raucous noise a lot of bikes seem to have.

S&S turbo mufflers, I have just put my standard headers pipes back on with these. 2009 Fatty. Not too loud, but with that traditional sound

Screamin Eagle slip on mufflers are quieter than most but still make a nice sound and people will still ehar you. There's always for sale on ebay too