Well I wanted a little more sound from the DL. I didn’t want aftermarket pipes as they were TOO Fricken expensive as in almost 1/8 the price of the bike, and I couldn’t use soft luggage with them.. I only wanted a Little more sound and not the obnoxious loud sound that kills the fun out of long distance canyon or carving. So I went the drilling out the Baffle route. How ever I did things a little different, I used a ¼ long bit, then ½.” From there I used a long 1” solid metal spike that worked great at widening the hole. I didn’t want to have to buy the 30.00 dollar 1” drill bit for Two applications. The Bike has a Nice Lower pitched growl to it now, which I can hear at idle or cruising briskly in 1st or second gear. At Highway speeds its not much louder then stock. Personally I would still like a little more sound, but I will just live with it as is for now. BTW my seat of the pants performance tests result in NO net gain or loss. But my BUTT aint calibrated.