Re: 1929 tailpipe clamp picture
I installed an STC muffler kit on a helicopter that was not originally designed to have anything other then a basic open header on each side. They used flexible piping and standard clamps to hold the muffler to the frame. I ended up purchasing a fiberglass tape like webbing and I used that under both clamps all the way around . It doesn't last forever but it keeps the muffler from chaffing and moving around in the clamps making noises.
Something like this may help with the tail pipe clamp. My Ford 850 tractor has enough joints in the pipe to help with the expansion so it doesn't seem to affect the clamps on it all that much. Of course a tractor is loud enough that you don't really notice any noises all that much.
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