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JE Pro Seal head gasket specified for Chrysler 318/340/360 small blocks measures 4.125 inches bore with a 0.039‑inch thickness. The gasket offers a matched sealing option for engine builds and repairs calling for these exact dimensions, serving as a direct replacement component for the listed Chrysler applications and helping ensure correct sealing during cylinder head installation.
JE Pro Seal Chrysler 318/340/360 4.125in 0.039in Headgasket (ref C5457-040)
