hello does anyone have or know where i can get a clamp on style muffler for an os 20 airplane engine? i'm building an eaglett and my uncle says that is a good size for it but we cannot find his muffler and i really do not want to have to drill and tap it for another one if i don't have to. thanks!

What is the exact model? Have you checked the parts express at Tower Hobbies to see if you can buy a replacement muffler for it?

no i have not yet thank you. i will look later today.