Here is what happened on mine. I have a Jettstream tuned muffler specially designed by Jett for the G2300 Supertiger. It is not a direct bolt on but uses an adapter plate.

The plate gets bolted on to the muffler similar to bolting on any ordinary muffler. There are a couple smaller screws inside the adapter coming the opposite way to attach to the muffler.

Now since last spring it was these smaller screws that kept coming loose after 2 flights and this was extremely reliable and getting me very upset for having to remove the cowl and make a big production over it. I tried Permatex High Strength Red and several others but nothing. After 2 flights it would come loose from the heat.

I put out the word right here on RCU for advise and several came up with the same brand of Permatex but this time using the "Sleeve Retainer." I have not had the muffler come loose all summer and probably 20 flights or so. Nothing gets hot like a tuned pipe. So in my opinion it works