I installed a hitch receiver on my '06 Rubicon. The tailpipe (custom that goes straight out and not angled down like stock) is only about 1/8th from rubbing on the hitch receiver so it vibrates and hits it when idling. I want to put a buffer (tape, rubber, cork, something) on the end of the receiver so when the tailpipe vibrates it doesn't Clink and clank against the receiver. Obviously it would have to be Heat tolerant. Thoughts?