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OEM silicone valve cover gasket used on the above engines with OEM cast aluminum valve covers. Note- These gaskets are not for use with the 502/502 valve covers (with "Chevrolet" script)- Only for use with smooth aluminum or ribbed (plain) aluminum covers that have a groove in the underside for this style gasket.
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GM (General Motors) - 10126727 - GM Valve Cover Gasket- Big Block Chevy- 454/425 HP & 502/450 HP Crate Engines Also 1991-1999 Chevy Trucks With 454
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