Selling an Arrow brand slip on muffler.
This came on a used K13S I bought, I've gone back to factory original.
No dents or rash, but the original matte finish has been chaffed/polished a bit by the rear support bracket.
Unit is extremely light, less than 3 lbs, and has a nice tone/rumble.
The K13S intermediate pipe is available, your needs may vary depending on your install.
All indications are that it is a titanium shell but there are no definitive markings.