Sorry to drag out such an old post, but I found it when searching for the reason why everyone uses teflon to mount headers/canisters on a gas engine. I found the answer was due to high heat.

I am new to gas engines and have broken my first header mounted on the DLE-30 (great engine by the way). The DLE-30 is soft mounted to the firewall to prevent high vibration. Just looking for thoughts on how to avoid breaking the next header.

The vendor of the header suggest that I cut it into just after the bend and put a second teflon coupler between the two pieces of pipe. Does that sound like it would work?

Courious on how IFLY3W and OnTheEdge solved their problem?