I have a K9 750 with a full yoshimura R-55 system on it which was there when I bought it and I'm not too sure what this is.
Is it a pre-muffler to help minimize noise or is it a small cat to keep it street legal.
I know it's a bit of a stupid question But I can't figure it out.

Is it a pre-muffler to help minimize noise or is it a small cat to keep it street legal.
I know it's a bit of a stupid question But I can't figure it out.