Hi, I had an interesting occurrence on my 2000 Heritage Springer. Since I upgraded to a 117, MVA heads, and S&S 570 cams the motor is a bit louder, not bad, but noticeable. I asked my indie, when he was doing a PM, to re-wrap the baffles. When he removed them, it looks like the original owner cut the baffles to only ~3 inches long. We left them as-is. Provides a little back-pressure, but not hate-full like a full baffle. Interesting.