You are headed in the right direction I am opting for the 54945K13. Same size but 316 SS. A little more Cr is a good thing. Bend radius is all I could ask for and as I am going for oldtimey look of a Sportsman Flyer. The frame has the SF badge on the head.
I don't know a tubing bender (Local ) to address the needs if this build. Having gone through the hassle of making/bending an exhaust for my 49cc Huffy-Davidson. My choice was to use the most period correct and adaptable exhaust system possible.
You guys have any links to a somewhat period correct muffler? PDF's photos from other builders? All input is greatly appreciated.
Tom from Rubicon,WI