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The King Engine Bearings CR 811SI is a set of connecting rod bearings designed for engine rebuilding and performance applications. These bearings are constructed from a bimetal silicon aluminum material, featuring 100% lead-free aluminum silicon for durability and dependability.

This SI-Series offers an aluminum-based material strengthened with 2.5-3% silicon, making them suitable for medium load engines or engines with nodular cast iron crankshafts. They are recommended for OE replacement applications, aftermarket gasoline or diesel engine rebuilding, and performance engines using factory crankshafts. The design includes improved oil clearance to reduce wear and increase engine life.