[8D]

I have a couple of ST .51s (old, before China) that I love, but the ST stock mufflers are a pain. Too big and bulky and they come apart in the air. Cost 50% of the cost of a new engine to replace. Is there a bolt=on replacement available? I'm not into metal work so I want something I can just screw on and fly. Thank for any ideas.

Mike H.