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.

I have just put my standard header pipes back on and using S&S turbo mufflers. Not too loud, but with that traditional Harley sound

these,
http://www.sscycle.com/product/2007-Up-Twin-Cam-96-103-110-/Exhaust/Tapered-Muffler-p20598.html

 

they look identical to your standard muffler except for the S&S logo

there the ones robnicko, I reckon they're great

S&S taper turbo's are one of the best mufflers on the market today , in conjunction with a decent air cleaner and tune {not a download} even a stocky will give a great result, and keep the classic sound.

Khromewerks do a tapered muffler , straight thru' , with No LOGOS embossed into them. They "look" stock

Much harder for PC plod to spot them. Perform just as well as S&S , and for a while there they were cheaper !

Rollies in Qld were the Aussie stockist a coupla years back. Good quality chrome and fittings

I've used them on a good number of bikes now , always with good results , minimal decel popping due to the "taper"

Khromewerks do a tapered muffler , straight thru' , with No LOGOS embossed into them. They "look" stock

Much harder for PC plod to spot them. Perform just as well as S&S , and for a while there they were cheaper !

Rollies in Qld were the Aussie stockist a coupla years back. Good quality chrome and fittings

I've used them on a good number of bikes now , always with good results , minimal decel popping due to the "taper"