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They were the only way to put a thin gasket for compression increase. But they will expose any head or deck surface flaws. Today's copper (and even more exotic coatings) are superior for seal thus performance.
But done right? Still formidable. My Schubeck marine engine did away with gasket in favor of steel o-rings. One big advantage of steel? Not having to replace everytime you pull head. Which in racing is alot. (At least my method of mangling parts. I'm sure if I was better? I would have less incidents. Lol.)
Reason I asked is because they have always been my go to along with the copper spray, but with all the new "high tech" ones out there, I just wondered if I was in my daughter's lingo, being a dinosaur again.