Mine was gutted fully. 3" opening that maybe for why I did Samson! Hated the Blub, Blub. Blub. Yours sound loud but in tune. Is that a stock OEM muffler?
they are my stock 08 street glide mufflers. I rode it after I cut the stock baffles out and it was louder but it had a nasty hollow echo sound to it. so I welded in the short baffles I made and was super impressed with the sound. it makes good power too. 75hp and 90tq with a thundermax, k/n intake and the custom slip ons. the dyno reads low compared to most too..
Back in 07 I picked up a set of modified stock mufflers from a guy on ebay. He offered three versions, I get compliments on the way they sound all the time. Sure wish I could find that guy again, I'd like to get a set for my new bike.