King Engine Bearings MB5766SI020 Main Bearing Set Silicon Aluminum Oversize - 020

The King Engine Bearings MB5766SI020 is a complete main bearing set engineered for Chevrolet L20, LS1, LS2, LS4, and LS6 engines with a housing bore that is +0.010 in. oversize. Designed for performance and durability, this set is manufactured using King's Bi-Metal Silicon Aluminum construction, providing reliable performance in a wide range of engine applications.

Key Features:

• Bi-Metal Silicon Aluminum Material: Aluminum-based alloy strengthened with 2.5–3% silicon for enhanced load capacity and wear resistance
• Optimized for Medium Load Engines: Ideal for stock-replacement and moderate performance builds requiring reliable main bearing support
• Compatible with Nodular Cast Iron Crankshafts: The silicon aluminum alloy composition is specifically suited for use against nodular cast iron journals
• Housing Bore Oversize +0.010 in.: Precision-sized for engines with a +0.010 in. oversize housing bore for an accurate, reliable fit
• Complete Main Bearing Set: Includes all necessary main bearings for a full engine rebuild or bottom-end service
• King pMax Black™ Technology: King bearings feature industry-leading overlay and surface engineering for reduced friction and extended service life

King Engine Bearings is a globally recognized manufacturer of precision engine bearings, trusted by OEM suppliers, professional engine builders, and motorsport teams worldwide. The MB5766SI020 is a direct-fit solution for Chevrolet Gen III and Gen IV LS-platform engines requiring an oversize main bearing set, ensuring proper oil clearance and long-term reliability.