S&S SPO-80 mufflers on my FLH because they're quiet for the long rides I do and they give a nice performance increase over the stock mufflers

 

Another vote for the CFR's, had samson fishtails first but prefer the sound of the CFR"s.

 

Rinehart 3.5"

 

Right now my bike is at the dealer getting the duals and slip ons installed. We went with the Vance and Hines EPA approved mufflers. I have obviously not heard them on my bike, but did hear another bike with them. Very deep sound at idle, but no painful drone to listen to on those 500 mile days. Can not wait to get it home.