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For comparison, we installed a Percy's XX carbon gasket (PN 68012) on the passenger side, and it also provided a completely leak-free seal. Made of woven carbon-fiber cloth, these things feel like thick velvet but resist burning at even 2,000 degrees F. Percy's claims an "ultimate seal on even the worst surfaces." While our Patriot heads are finely machined all over, these XX carbon gaskets would have been cheap insurance on the lumpy factory iron head castings we showed you in Part Two (Oct. '07).
383ci - Build Your First Engine

 For comparison, we installed a Percy's XX carbon gasket (PN 68012) on the passenger side, and it also provided a completely leak-free seal. Made of woven carbon-fiber cloth, these things feel like thick velvet but resist burning at even 2,000 degrees F. Percy's claims an "ultimate seal on even the worst surfaces." While our Patriot heads are finely machined all over, these XX carbon gaskets would have been cheap insurance on the lumpy factory iron head castings we showed you in Part Two (Oct. '07).  View Related Article

 

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