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The JE Pro Seal head gasket for Chevrolet Small Block 400 provides a correct-dimension replacement with a 4.125 in bore and 0.039 in thickness. Part of JE’s Pro Seal family, it matches the original bore and compressed thickness expectations for Small Block 400 rebuilds. Reference C5247-040 to identify the gasket when performing head gasket replacement or engine assembly.
JE Pro Seal Chevrolet Small Block 400 4.125in 0.039in Head Gasket (ref C5247-040)
