King Engine Bearings MB556XPNSTDX Main Bearing Set Chevy 396-502 Gen IV V VI pMax Black

The King Engine Bearings MB556XPNSTDX is a high-performance main bearing set engineered specifically for Chevrolet big block 396-502 cubic inch engines across Gen IV, V, and VI platforms. These race-grade bearings feature King's advanced pMax Black coating technology for superior protection under extreme loads and high RPM conditions.

Key Features:

• Tri-metal construction combining a steel backing, copper-lead intermediate layer, and performance overlay for optimal strength and wear resistance
• pMax Black proprietary coating provides enhanced protection during initial startup and reduces friction throughout the bearing surface
• Precision-manufactured to OE specifications with tighter tolerances for race applications
• Standard (STD) size for direct replacement without machining
• XPN performance series design optimized for high-output street and racing engines
• Compatible with Chevrolet 396, 427, 454, and 502 cubic inch big block engines (Gen IV, V, VI)

King Engine Bearings are trusted by professional engine builders and racers worldwide for their consistent quality and durability. This complete main bearing set includes all bearings needed for a full crankshaft installation. Ideal for performance rebuilds, race engines, and high-horsepower street applications where bearing reliability is critical.