I have G-38 mounted on 96inch Fairchild 22-the muffler is a pitts type muffler-this engine is way too loud-any suggestions on quiet mufflers I do not have much room behind engine and fire wall-thanks

Being a gas engine you can move the fuel tank somewhere else other than the likely spot of right behind the firewall like a glow engine. Use that space for a canister type muffler.

How about using the stock muffler as that's about as quiet as you can get, but expect a small reduction in power.

Karol