King Engine Bearings MB4272XPSTDX xP Series Main Bearing Set STD

The King Engine Bearings MB4272XPSTDX is a standard-size main bearing set from King's premium xP™ (extra Performance) series, engineered for high-performance and competition engine applications. These bearings feature King's advanced tri-metal construction combined with their proprietary pMax Black™ polymer coating, delivering exceptional load capacity, wear resistance, and oil film retention under extreme operating conditions.

Key Features:

• xP™ Series Technology: King's extra Performance line designed for forced induction, high-horsepower, and racing applications
• pMax Black™ Coating: Proprietary polymer overlay that reduces friction, improves embedability, and protects against dry-start wear
• Tri-Metal Construction: Steel backing with copper-lead or aluminum alloy intermediate layer for superior fatigue strength
• Standard (STD) Size: Direct OEM replacement sizing for engines with stock or freshly machined journals within factory specification
• Precision Tolerances: Manufactured to tight dimensional tolerances for optimal oil clearance and consistent performance
• High Load Capacity: Engineered to handle elevated cylinder pressures associated with performance and modified engines
• Debris Resistance: Enhanced embedability helps protect journals from small particulate contamination in the oil system

King Engine Bearings is an ISO-certified manufacturer trusted by professional engine builders and OEM suppliers worldwide. The MB4272XPSTDX main bearing set is an ideal choice for engine rebuilders seeking a performance upgrade over standard OEM bearings while maintaining factory journal sizing.