King Engine Bearings MB 556HPN STDX Main Bearing Set for Chevrolet 396-502 Big Block

The King Engine Bearings MB 556HPN STDX is a high-performance main bearing set engineered for Chevrolet big block V8 engines, specifically the 396, 402, 427, 454, and 502 cubic inch Gen IV, V, and VI variants. Part of King's pMaxBlack performance racing line, these bearings feature advanced metallurgy and precision manufacturing to withstand the extreme loads of high-performance and racing applications.

Key Features:

• Standard size (STD) main bearing set for Chevrolet big block 396-502ci engines
• HPN (High Performance) coating provides superior wear resistance and embedability
• pMaxBlack racing line construction with aluminum alloy overlay
• Tri-metal design with steel backing, aluminum-tin intermediate layer, and performance overlay
• Compatible with Gen IV, V, and VI Chevrolet big block engines
• Precision-engineered tolerances for optimal oil clearance and bearing crush
• Enhanced fatigue resistance for high-RPM and high-load applications

King Engine Bearings are designed for engine builders and performance enthusiasts who demand race-proven reliability. The HPN coating technology reduces friction while improving resistance to dirt and debris, making these bearings ideal for street performance, drag racing, and marine applications. This complete main bearing set includes all bearings required for a standard big block Chevrolet crankshaft installation.