What is the purpose of main bearings in an engine?

Main bearings support the crankshaft within the engine block. They create a precise gap for oil to flow, lubricating the spinning crankshaft and reducing friction and wear.

What does 'Standard Size' mean for these bearings?

Standard size bearings are designed for use with a crankshaft that is at its original factory diameter. If your crankshaft has been machined undersize due to wear or modifications, you would need a different size bearing.

What is the King SI (Silver) overlay?

The SI overlay is a silver-colored material used by King Engine Bearings. It's known for its durability and ability to handle the increased loads often found in performance or modified engines.

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Specifications

Brand: King Engine Bearings
Part #: MB5234SI
UPC: 611500623486

King Engine Bearings Subaru EJ20/EJ22/EJ25 (Size STD) Performance Main Bearing Set

Name: King Engine Bearings Subaru EJ20/EJ22/EJ25 (Size STD) Performance Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-subaru-ej20-ej22-ej25-size-std-perform-t14-714394
Price: 54.71 USD
Availability: BackOrder

$54.71

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Key Features

Fits Subaru EJ20, EJ22, and EJ25 engines.
Standard size main bearing set.
Features King's SI (Silver) overlay for performance applications.
Helps maintain proper oil clearance for crankshaft lubrication.
Designed for engine rebuilding and performance builds.

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About this part

Product Details

King Engine Bearings is well-known for making solid engine bearings, and this standard size main bearing set for Subaru EJ20, EJ22, and EJ25 engines is a good example of their work. If you're rebuilding the bottom end of your Subaru, these bearings are crucial for ensuring the crankshaft spins smoothly within the engine block. They help maintain the correct oil clearance, which is vital for proper lubrication and preventing wear on these critical components.

This set uses King's SI (Silver) overlay, which is a popular choice for performance applications. It's a well-built bearing designed to handle the demands of modified engines. The standard size means they are intended for use with a crankshaft that has not been machined undersize. Proper installation, including ensuring the crankshaft journals are clean and within factory specifications, is key to getting the best performance and longevity from these bearings.