King Engine Bearings MB443XPSTDX XP Series Main Bearing Set

The King Engine Bearings MB443XPSTDX is a high-performance main bearing set from King's XP Series (Xtreme Performance) line, designed for race engines and demanding performance applications. This standard size bearing set features King's advanced tri-metal construction for superior durability and load capacity.

Advanced Tri-Metal Construction:

• Enhanced tri-metal design with layered copper-lead construction
• Nickel plate barrier layer for superior stability
• Lead/tin/copper Babbitt overlay on steel backing
• Superior embedability and contaminant resistance

Precision Manufacturing:

• Bulls Eye tolerance maintaining wall thickness at +/- 0.0001 inch
• Narrowed design for large radius crankshafts
• Enlarged, chamfered oil holes for improved oiling
• Medium eccentricity for optimum load distribution

Race-Proven Performance:

• Engineered to withstand extreme loads and high RPM conditions
• Proven in circle track, drag racing, and high-performance street applications
• High load capacity with consistent, reliable performance
• Compatible with both steel and nodular cast iron crankshafts

King Engine Bearings has specialized exclusively in engine bearings since 1960, leveraging racing as the ultimate testing laboratory. Every King bearing utilizes the highest quality materials and most advanced designs to ensure complete customer satisfaction in both race engines and daily drivers.