Dyna Glide ModelsSuper Glide, Super Glide Sport, Super Glide Custom, Dyna Glide Convertible, Super Glide T-Sport, Dyna Glide Police, Dyna Switchback, Low Rider, Street Bob, Fat Bob and Wide Glide.
The fixed fairing on my Road Glide really amplifies it!
I have been told time and time again that it's normal...."It's a Harley".
I too believe that loud pipes and a louder stereo help immensly.