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in other communities using HKS headgaskets, i have never heard of any other gasket available being the same. If they dont make them themselves, they are an exclusive item to them
its not supposed to an actual ring, just a folded over layer to create greater sealing pressure just around the cylinder walls
Do the HKS hg's have that, charles? I didn't look close enough. Do you honestly think that these are better than the stock ones (because they have rings)? What do you think?