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The JE Pro Seal head gasket for Chevrolet Big Block Mark IV and Bowtie engines is specified with a 4.375 in bore and 0.039 in thickness for direct replacement. Part of JE’s Pro Seal line, it matches OEM-style dimensions used in Big Block rebuilds and head installations. Reference C5329-040 to ensure the correct gasket selection during engine assembly or maintenance.
JE Pro Seal Chevrolet Big Block - Mark IV & Bowtie 4.375in 0.039in Headgasket (ref C5329-040)
