Lifter Valley Oil Baffle, Small Block Chevy, including 18° heads Increases horsepower by shielding bottom of intake manifold from hot oil Keeps surplus oil out of valve covers by eliminating oil splash Maintains oil pressure during pushrod or rocker arm failure by keeping lifters in their bores (except with roller cam) Due to slight variations in blocks, the baffle may have to be trimmed.060-.100 before it will snap into place Cannot be used with roller lifters

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