Sport Pilot, Did you mean idle bar glow plug? If so, that is what I have in the engine, Fox long. If you meant idle bar muffler, I do not know what that is. I'm sure I use to run 10% nitro in the engine back in the 70's. The engine ran great back then and I think it is going to run fine with the Dubro baffle plate muffler. But the Dubro muffler is so loud.
Thanks, Ralph White