I have made up 10 cans already. I swaged them for a tight fit over a 2.5" outlet, but had to split mine and put a high-strength clamp on, as my header was a bit beat up. That said, the muffler, and a clamp for $125. If you bring your bike, I will make you a hanger that uses the p-peg bolt like mine, "on the house". If not, you will need to figure that on your own. These things are all stainless, including the core FWIW.
Fabricator
On edit: The main body of these mufflers is 3" od, and 11" long. Overall is 14 1/2". Currently the internal perforated core is about 9" long, and 1 1/2" ID all the way through. Other lengths can be made to suit.