King Engine Bearings MB5893SI0.25 Main Bearing Set Undersize - 0.25mm

The King Engine Bearings MB5893SI0.25 is a main bearing set manufactured to exacting tolerances for engine rebuilding and performance applications. This set is sized at a 0.25mm undersize, making it suitable for use with standard re-ground crankshafts where journals have been machined to restore proper surface finish and geometry.

King Engine Bearings are engineered using advanced bi-metal and tri-metal construction techniques, delivering exceptional load capacity, conformability, and wear resistance. The SI designation indicates a silicon-aluminum alloy overlay, which provides excellent corrosion resistance, superior embedability for contaminants, and reduced sensitivity to oil film interruption compared to conventional bearing materials.

Key Features:

• Silicon-aluminum (SI) alloy construction for superior wear resistance and corrosion protection
• 0.25mm (0.010") undersize for use with re-ground crankshaft journals
• Precision-machined to tight tolerances for consistent oil clearance and proper fitment
• High load capacity suitable for performance and daily-driven applications
• Electroplated overlay for enhanced surface conformability and embedability
• Manufactured to meet or exceed OEM specifications

King Engine Bearings is a globally recognized manufacturer trusted by professional engine builders and OEM suppliers worldwide. The MB5893SI0.25 main bearing set is an ideal choice for engine rebuilders seeking a reliable, high-quality replacement bearing solution.