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The JE Pro Seal head gasket for Ford Cosworth YB and related DOHC/SOHC applications fits a 92.5 mm bore and uses a 0.039 inch thickness to match specified sealing dimensions. It serves as a direct-fit replacement for Cosworth YB family rebuilds and repairs where accurate bore and thickness are required to restore head-to-block sealing. See JE reference C4218-040 to confirm fit.
JE Pro Seal Ford Cosworth DOHC YB/ SOHC OHC/NEP 92.5mm 0.039in Headgasket (ref C4218-040)
