What does the +0.002 inch size mean for my engine build?

The +0.002 inch (+0.50mm) sizing indicates these bearings are intended for use when the crankshaft journals have been machined down by 0.50mm. This ensures the correct oil clearance is maintained for proper bearing function after the crankshaft has been resized.

What is the material of these bearings?

These main bearings are made from a bi-metal aluminum material and feature a lead-free composite. This construction is chosen for its suitability in medium-load engine applications.

Are these bearings suitable for high-performance or racing engines?

These bearings are described as ideal for medium-load engines. For high-performance or racing applications, it's always best to consult with your engine builder or King Engine Bearings' specific product recommendations for those demanding uses.

Specifications

Brand: King Engine Bearings
Part #: MB5739SI0.5
UPC: 611500610240

King Engine Bearings Subaru Ej20/Ej22/Ej25 Housing Bore + .002 (Size +0.50mm) Main Bearing Set

Name: King Engine Bearings Subaru Ej20/Ej22/Ej25 Housing Bore + .002 (Size +0.50mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-subaru-ej20-ej22-ej25-housing-bore-002-t14-770927
Price: 117.08 USD
Availability: BackOrder

$117.08

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King Engine Bearings Subaru Ej20/Ej22/Ej25 Main Bearing Set. Size +0.50mm. Ideal for medium-load engines.

Key Features

Fits 1990-2019 Subaru and Saab models including Forester, Impreza, Legacy, Outback, Baja, WRX STI, and 9-2X.
Main bearing set for Subaru EJ20, EJ22, and EJ25 engines.
Housing bore size is +0.002 inches (+0.50mm), suitable for machined crankshaft journals.
Constructed with a bi-metal aluminum material.
Features a lead-free, environmentally safe composite.
Ideal for medium-load engine applications.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

If you're rebuilding the bottom end of your Subaru EJ20, EJ22, or EJ25 engine, a solid set of main bearings is crucial. These main bearings from King Engine Bearings are designed for the housing bore and come at a +0.002 inch (+0.50mm) size, meaning they're intended for applications where the crankshaft journals have been machined down by 0.50mm. This size is important to ensure proper oil clearance and bearing function after engine work.

King specializes in bearings, and this set is made from a bi-metal aluminum material. It features a lead-free composite that's environmentally safe and works well in medium-load engines. This construction helps provide reliable performance for your rebuilt Subaru engine, fitting a range of vehicles like the Subaru Impreza, Forester, and Legacy, as well as the Saab 9-2X.