I agree with Warren & Sam, LOL I had a pair of K model mufflers on my R-50 after I brought it back to the states in 1959. couldn't get a Set of mufflers from BMW in a reasonable amount of time , not to mention the cost. They made music on the BEEMER, Sam would have appreciated them!
HD has the technology to do a remake of the old K model with modern updating like over head valves, cams etc and even the dreaded water cooling with out importing them from 5th world countries. That would be super neat.
I don't like radical noise myself, my HD had a pair of HOOKER slash cuts on it when I bought it, TOO LOUD and they got traded for a set of stock takeoff's which are still opened up to make it sound like a Harley should! OF course IF I was still in my mid twenties ETC and chasing girls and riding Bar to Bar you would have to
Eldon