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The JE Pro Seal head gasket for Chevrolet Small Block 400 provides a 4.20 in bore and 0.039 in compressed thickness for applications that require that specific size. As part of JE’s Pro Seal line, it’s supplied to match OEM-style dimensions for rebuilds and head replacements. Reference C5249-040 for correct identification when completing engine assembly or maintenance.
JE Pro Seal Chevrolet Small Block 400 4.2in 0.039in Headgasket (ref C5249-040)
