Before using mine, I cut a gusset from aluminum, and had it heliarced at the junction of the can and the pipe....On a nose over, the pipe was bent at a 45' angle and the canister was crumpled on the end..The tube was still intact and no leaks.. been flying this way several times and no problems yet.. These mufflers are very thin and cheaply built, seems with the success of these engines DL could invest a few more pennies and construct a useable reliable product...