King Engine Bearings MB5220SI1.0 Main Bearing Set Oversize Subaru - 1.0mm EJ20 EJ22 EJ25

The King Engine Bearings MB5220SI1.0 is a premium OE-replacement main bearing set engineered specifically for Subaru EJ20, EJ22, and EJ25 engines, including turbocharged variants. This 1.0mm oversize bearing set is designed for engine rebuilds requiring oversized bearings due to crankshaft machining or wear.

SI Series Construction:

King's SI Series features advanced bi-metal construction with an aluminum base material blended with 2.5-3% silicon for enhanced strength and durability. This lead-free bearing material is ideal for medium-load engines, particularly those with nodular cast iron crankshafts, making it an excellent OE replacement option for street and performance applications.

Key Features:

• 1.0mm oversize specification for machined crankshafts
• 5-pair complete main bearing set
• Lead-free aluminum-based bi-metal construction
• Environmentally safe composite materials
• Precision-engineered for Subaru EJ series engines
• Compatible with turbo and naturally aspirated applications
• Optimal for medium to heavy load engines

Applications:

Designed for Subaru vehicles equipped with EJ20, EJ22, and EJ25 boxer engines, including WRX, STI, Legacy, Forester, and Outback models. This oversize bearing set is specifically manufactured for engine rebuilding applications where the crankshaft journals have been machined 1.0mm undersize.

King Engine Bearings has been a trusted name in engine bearing technology since 1960, specializing exclusively in bearing manufacturing. Their commitment to quality control ensures tight wall thickness tolerances and consistent performance across all bearing shells.