I could tell that there was always just a small amount of exhaust gas getting past the copper gaskets. Not enough to hear but I could see faint soot trails. The good news is the leak never got any bigger so I guess the gaskets were a success. On the street cars my only current choice is Remflex with one set now over a dozen years since installation.
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Mick Batson
1967 original owner Tyro Blue/black top 4-speed HO GTO with all the original parts stored safely away -- 1965 Catalina Safari Wagon.
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