King Engine Bearings MB5878SM0.5 Main Bearing Set Undersize - 0.50mm

The King Engine Bearings MB5878SM0.5 is a precision-engineered main bearing set designed for engine rebuilding and performance applications. This set features 0.50mm (0.020") undersize bearings, commonly used when crankshaft journals have been machined during reconditioning or repair work.

Key Features:

• Precision 0.50mm undersize for machined crankshaft journals
• High-performance tri-metal construction for superior durability
• Engineered bearing geometry for optimal oil clearance
• Strict quality control ensures consistent tolerances
• Designed for demanding street and racing applications

King Engine Bearings are manufactured using advanced materials and processes to deliver exceptional wear resistance, fatigue strength, and thermal stability. The tri-metal design incorporates a steel backing, copper-lead or aluminum-tin intermediate layer, and a specialized overlay to protect against corrosion and provide excellent embeddability of foreign particles.