King Engine Bearings MB5739SI Main Bearing Set Subaru Oversize - EJ20/EJ22/EJ25 002

The King Engine Bearings MB5739SI is a precision-engineered main bearing set designed specifically for Subaru EJ20, EJ22, and EJ25 engines requiring a +.002" (0.002 inch) oversize housing bore. This bearing set is ideal for engine rebuilds where the crankcase has been line-bored or align-honed to the next oversize specification.

Key Features:

• Bimetal construction with aluminum-silicon alloy base for superior strength and durability
• +.002" oversize housing bore dimension for precision fitment in machined engine blocks
• Direct replacement for Subaru EJ-series engines including EJ20, EJ22, and EJ25 applications
• Engineered to OEM specifications with enhanced performance characteristics
• Complete main bearing set for full crankshaft support

King Engine Bearings are manufactured using advanced metallurgy and strict quality control processes to ensure proper oil clearances, load distribution, and long service life. The aluminum-silicon bimetal construction provides excellent conformability, embedability, and resistance to fatigue under high-stress conditions. This oversize bearing set is essential when rebuilding engines that have experienced bearing wear requiring block machining to restore proper crankshaft alignment and bearing crush.