Originally Posted by stuntflyr

Nice Colt.
C/L Stunt guys have a few cottage industry sources for small mufflers that are light, adjustable back pressure and small. I have many aluminum "tongue" mufflers and that woud make it so you could completely hide all of your exhaust but the outlet on the bottom.
I use Stuka Stunt Works for my custom stuff. They have a website and a forum. I think that little OS was a popular engine at one time for C/L and they may have the measurements.
http://www.clstunt.com/
Chris...