I'm not sure if the centers in my Dyna mufflers are catalytic converters or not. They have a center in them that looks like the honeycomb center of a converter.
You can't see through them, and they come off of an injected bike.
It appears there is some sort of a catalyst in there, but not sure what it is. so I'm going to knock the centers out of them, and see how they sound.
I was at one time leaning towards a set of super Trapp mufflers, but they are so damned expensive. So I will experiment with these mufflers, and see what they sound like in the end. If I ruin them I will just throw them in the trash, and start over.
I have a neighbor who has an older Harley and he has straight pipes with fishtail ends. They are true duals and the pipes go all the way to the end of the rear wheel, and they sound pretty loud, but he rarely ever gets on it in town or in the neighborhood.
When I was younger, I used to own a 72 Ford F150 with a built 390 with headers, 3 inch pipes with 5 inch stacks running through the bed right behind the cab with no mufflers. She was loud, but she sure sounded good.
I guess as I get older I want it somewhat quieter. My hearing isn't the best, but all the loud noises over the span of my life hasn't hurt my hearing too awful bad. I worked at a 1/4 mile racetrack, and I never wore hearing protection. Now I deal with the eternal burnout syndrome. Sucks.