I have the Supertrapp 4" Stouts on my 2012 Fltru with a Fuel Moto 2-1-2 head pipe . I ordered the pre cat model and just love the sound of them with my 103. I have about 7000 miles on them and I would say they are getting a tad louder as the wrapping burns. Still can hear the tunes going down the highway and a great sound when you get on it. I order up a set of post cat baffles just for shits and giggles and installed them, wow did they make a difference. Too loud for me at my age ,ten yrs. ago I would be smiling from ear to ear.
I have just installed a Fuel Moto 107" kit ,which does a bump in compression and that makes my original baffles sound perfect now.
2012 FLTRU ,Ember Red Sunglo, painted inner fairing, WO 515 Chubby bars, 14"and 16" dark smoke Windvest, J&M 6 speaker Rokker system w/ 500W amp, Zumo 665 Road Tech G.P.S. w/Iron Aces mount, Mustang "Super Touring w/backrest, Fuel Moto air cleaner,2-1-2 headpipe, SuperTrapp 4" Stouts, Wood WT555 cams, Wood lifters, SE adjustable push rods,Power Vision tuner, Foorboards moved out 1" and forward 1"