What converter?  What catalyst?  I haven't messed with the guts.  

It's nicely louder, lower tone, without being obnoxious. And the annoying high pitched "whistle" of the stock muffler is gone (that's the best part of the new exhaust note in my opinion).

It flows better than the stock OEM muffler and you probably want to bump up the main jet 1-2 sizes to take advantage of the better breathing and avoid running too lean.  If you have the stock carb, you probably want to thin the white spacer (or replace the white spacer with 1-2 #4 washers from the hardware store) on the needle to tune and enrich the midrange  What kind of carb and intake set up do you have?

I wouldn't mess with the guts.  Noise will increase without baffles but it really doesn't change the flow or restriction too much.  Hook it up and go.

Thanks for your reaction. It makes it easier to decide. I kept looking and found 2 of which I think there is no catalyst in it. Then I have 2 and I can experiment with 1 and drill holes so that I can adjust the volume of the sound.

I was at a traffic light this week and a chopper stopped next to me that produced a great sound. Almost everything that had been done to his bike was illegal. And he looked at my bike and said; nice helmet you have. (My helmet is not an approved model).

I've often been told that my bike is too quiet. Even by my neighbors.
It could be that they're deaf, they're elderly.

But maybe I've become too well-behaved. That in itself gives peace because then you also get around to doing other things than paying fines and cleaning up messes.

But maybe I've took it a bit too far.
I'm not yet at the age where I need Ritalin to get back up, so a different exhaust is a good start.