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JE Pro Seal head gasket for Chrysler 318/340/360 small‑block applications is specified at 4.08 inches bore diameter with a 0.039‑inch thickness. This Pro Seal gasket provides a dedicated sealing solution matched to the listed Chrysler small‑block bore and thickness, intended for engine rebuilds where the stated dimensions are required for proper head sealing and reliable reassembly of those specific engines.
JE Pro Seal Chrysler 318/340/360 4.08in 0.039in Headgasket (ref C5622-040)
