King Engine Bearings MB5840XPSTDX Performance Main Bearing Set

The King Engine Bearings MB5840XPSTDX is a high-performance main bearing set engineered for demanding applications in Chrysler HEMI V8 engines. This race-grade bearing set features King's advanced pMax Black coating technology, providing superior protection under extreme loads and high-RPM conditions.

Key Features:

• Trimetal construction with proprietary alloy composition for maximum strength and durability
• pMax Black coating reduces friction and provides excellent wear resistance
• Race-grade design engineered for high-performance and competition applications
• Precision-manufactured to OE dimensions for proper fitment and oil clearances
• Standard (STD) size for engines with unworn or freshly machined crankshafts
• XP series performance bearings designed for modified and boosted engines

King's pMax Black coating is a polymer-based dry film lubricant that enhances break-in characteristics while providing additional protection during cold starts and extreme operating conditions. The trimetal construction consists of a steel backing, aluminum-tin alloy layer, and specialized overlay for optimal load-carrying capacity and conformability. This bearing set is ideal for performance street builds, road racing, drag racing, and other high-stress applications where standard bearings may not provide adequate protection.