I had Sanderson lake headers on my 32' 3 window. One day, I put the car cover on too soon and it melted onto the headers. I got off what I could with solvent, then went to town with an SOS soap pad. It not only got the plastic off the headers, but polished it too. 6 years and still looking good.

Don, I had Heddman headers on my 65' Biscayne with Merlin heads. Slight mismatch between the exhaust port and the headers. I found some exhaust biscuits at Earls braided supply. Trim to fit, exhaust leak is gone. No leaks after 4 years so far.