Loren,
My muffler is much like Davemk1’s photo above. I have not seen the DNA or Flowmaster Hushpower inside, when I opened mine up I liked what I saw. It is about 8” in Dia. and about 25” long. It has a perforated 2” pipe inside. The sound media chamber is outside the pipe in the surrounding chamber. The perforations are a series of .250” holes in the pipe. I could drop a 2” ball in one end and it would drop straight through. I think it had a ceramic cloth media inside that lasted less than 3,000 miles. I think you can get it with the S.S. wool from burns also. I’m not sure of any price points on the system or fill. I purchased my S.S. wool local, but when I called Burns they were very helpful on fill instructions. The only downside I see is the weight.
Gary