Main bearing oil gallery restrictors reduce oil supply to the top end of engine. set of 4 restrictors for No. 1, 2, 3, 4 main housing bore oil holes leading to the cam bearings.Β Install restrictors with a 3/8" drift punch, knurling provides an interference fit, use with loctite.Β Will work with 307-455 EXCEPT 403 engines
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π What Makes This Product Special
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Product Features
This Oldsmobile Oil Restrictor Main bearing oil gallery restrictors combines elegant design with practical functionality. Every detail has been carefully considered to ensure you get the premier possible experience. The finest construction means this product will serve you well for years to come.
outstanding For
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