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The JE Pro Seal head gasket for Chevrolet Big Block Mark V and VI is specified at 4.54 in bore and 0.039 in thickness to provide a correct-dimension replacement in those engines. As a Pro Seal product, it matches the compressed thickness and bore sizing expected for Big Block rebuilds and head installations. Reference C5333-040 for accurate identification during maintenance or assembly.
JE Pro Seal Chevrolet Big Block - Mark V & VI 4.54in 0.039in Headgasket (ref C5333-040)
