I have seen guys that used a plate on the outside of the muffler with long bolts.....I have never had a muffler come loose using split locks and Blue Loctite so I'll just keep with what works for me. I did check the head temp of my DLE30 this week 171F at idle 197F at full throttle this was a ground check. The outside temp was a cool 38 at the time so I'm sure the summer temp will be higher.

I agree with all, on not over heating,and keeping vibration to a minimum........helps keep them tight also.

Sorry....I was directing the plate answer to Dirtybird