King Engine Bearings MB5739SI0.25 Main Bearing Set Subaru Oversize - EJ20/EJ22/EJ25 0.002

The King Engine Bearings MB5739SI0.25 is a precision-engineered main bearing set designed specifically for Subaru EJ20, EJ22, and EJ25 engines with a housing bore oversize of +0.002 inches. This bearing set provides the critical interface between the crankshaft and engine block, ensuring smooth rotation and proper oil clearance in modified or rebuilds requiring slightly oversized specifications.

Key Features:

• Bimetal construction with aluminum-silicon alloy base for excellent wear resistance and heat dissipation
• +0.002" housing bore oversize specification for engines with machined or worn main bearing bores
• Engineered specifically for Subaru EJ-series boxer engines (EJ20, EJ22, EJ25)
• High-quality materials ensure proper oil film retention and reduced friction
• Precision manufacturing to OEM tolerances for reliable fitment and performance

King Engine Bearings are trusted by professional engine builders and performance enthusiasts worldwide. This main bearing set is ideal for engine rebuilds where the block has been align-honed or requires oversize bearings to achieve proper clearances. The aluminum-silicon bimetal construction provides excellent conformability and embedability while maintaining structural strength under high loads.