The MVVS Is going on the side of an 80" profile plane. A pitts style muffler will not work. I would need a 5" extension to get it to clear the fuselage. When I say regular muffler I am referring to something similar to the stock muffler that comes with alot of 2 stroke engines. This is a pic of the muffler that comes with the 2.15 glow. They don't list it as an option for the gas version.

How much for the pipe and header?