King Engine Bearings MB 556XPN 020 Main Bearing Set Chevrolet 396-502 Big Block

The King Engine Bearings MB 556XPN 020 is a high-performance main bearing set engineered for Chevrolet big block engines, including 396, 402, 427, 454, and 502 cubic inch Gen IV, V, and VI variants. This .020" oversize bearing set is designed for racing and high-performance applications where precision and durability are critical.

Key Features:

• pMax Black tri-metal construction for superior strength and wear resistance
• .020" oversize for machined crankshafts
• Race-spec design for high-performance and competition engines
• Precision-engineered for Chevrolet Gen IV, V, and VI big block engines
• Advanced tri-metal bearing technology with high-strength steel backing, copper-lead overlay, and nickel barrier layer
• Optimized for high load and high RPM applications

King Engine Bearings pMax Black series represents their top-tier racing bearing technology, featuring enhanced crush and improved oil retention properties. These main bearings are specifically sized for crankshafts that have been machined .020" undersize on the main journals, making them ideal for rebuilt racing engines and performance builds requiring oversized bearings.