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The JE Pro Seal head gasket for Chevrolet Big Block Mark IV and Bowtie engines is supplied with a 4.54 in bore and 0.039 in thickness for applications requiring that dimension. This Pro Seal option is intended for correct-dimension replacement during Big Block rebuilds and head service. Reference C5330-040 to identify the gasket when performing repairs or assembly.
JE Pro Seal Chevrolet Big Block - Mark IV & Bowtie 4.54in 0.039in Headgasket (ref C5330-040)
