Sounds like your running the 65115-98b SE mufflers with the removable canister baffle, HD quit production on them in 07 due to tightened EPA restrictions, IMHO they were about the best sounding mufflers Harley sold at that time. Ive experimented with a number of baffles, you can remove the canister pull the inner baffle out by removing the spot welds on the outer outlet cap but its not worth the trouble, the baffles look restrictive from the end but they are not, the inlet and outlet holes are straight through but there is a deflector that blocks the view and give the appearance that they are sealed but in reality the baffles are straight through with a chamber in between, I still have a couple of sets stashed away, I have tinnitus that I attribute to years of loud mufflers and wind noise, I wear ear plugs religiously now that the damage is done lol I sure wouldn't want them any louder, you can flatten the deflector with a ground stake or other large steel rod and gain a few db's without much trouble.