Mr. Gasket Ultra-Seal Head Gasket 283-400 Chevrolet Small Block Gen I 1957-1991

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Overview Mr. Gasket Ultra-Seal Head Gaskets are a five layer (graphite core/perforated steel outer layers) composite construction. The graphite core has excellent thermoconductivit y (transfers heat) away from hot spots in head preventing gasket burn-out. They provide excellent stability, compressibility and high temperature endurance. A high temperature silicone coating ensures sealing of engine fluids. Compatible with cast iron or aluminum heads, they will not brinell (indent) aluminum cylinder heads. Suitable for high performance street, drag race and oval track use. Sold individually.Gasket Bore 4.190 inch, Compressed thickness 0.038 inch Fits 1970-1979 Chevrolet 400 Gen I Small Block - Gasket Bore - 4.190 Inch Features Five layer (graphite core/perforated steel outer layers) composite construction Graphite core has excellent thermo-conductivity-transfers heat away from hot spots in head preventing gasket burn-out Provides excellent stability, compressibility and high temperature endurance Coated with high temperature silicone to ensure sealing of engine fluids Will not brinell (indent) aluminum cylinder heads For high performance street, drag race and oval track use Show more