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The JE Pro Seal head gasket for Chevrolet Big Block Mark V and VI offers a 4.63 in bore with 0.039 in thickness for direct replacement in compatible heads and blocks. This Pro Seal option is intended to match OEM-style dimensions for Big Block rebuilds and head gasket changes. Reference C5334-040 when confirming the correct gasket for service or assembly.
JE Pro Seal Chevrolet Big Block - Mark V & VI 4.63in 0.039in Headgasket (ref C5334-040)
