I just bought a new Evolution 33cc for my giant u-can-do
I think they will be a good match. Here is the problem the wrap around muffler that comes with it will not fit that narrow of a fuse. And I cannot put a cowling on the plane. Does anyone know of a conventional muffler that will fit it.
They don't seem to have one on their site.

This muffler should work great for your application. It is a bolt on for the 33GX engine.

EVO30943410

http://www.evolutionengines.com/Prod...ID=EVO30943410

Pete