So the backstory is I got one of those factory replacement mufflers for my 200es from Dennis Kirk, and it's supposed to be slip on but has never sealed well at all to the original front pipe. I first tried using some aluminum foil to seal it, and that blew out almost immediately. Then I tried a sheet of lead, and that worked amazingly well, but only lasted for a couple months before it blew out too. I can't really find anything else that's meant for this, so I was wondering if anyone had any suggestions. There's only a small gap, wrapping aluminum foil 2 or 3 times around fills it, but it's big enough that I can feel exhaust gasses coming out, and it lets air in and pops really loudly when I let off the gas (it's tuned fine, it didn't do that when I had it sealed up briefly)