Brian Tooley Racing Chevrolet Performance VVT Camshaft Bolt – Replacess 12588151, 12682000

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�These GM camshaft retainer plates are designed to fit behind the front cover and act as a seal for the front oil passages that feed oil to the lifters, cam, and main bearings. They feature a specially designed gray O-ring seal to keep oil sealed in. The plates support greater cam loads.