Hey kinda of a WT noob. First time poster, short time reader. So I don't have the headers yet but before I try to find one wanted to know what my options are. If anyone could "pipe" in it be much appreciated. I'm totally cool with a redirect. Thanks.
1) Buy a 900RR exhaust can that bolts right up.
2) Cut the flange off and find a slip-on that is around 63mm inlet (header is about 61 mm OD).
3) Buy another can you like and get your local muffler shop help you adapt it.
If you do a search on "900RR" you should find lots of good examples.