What does 0.25mm oversized mean for these bearings?

This means the bearings are slightly larger than the standard size by 0.25mm. This is typically used when the engine's crankshaft journals have been machined down to a 0.25mm undersize to correct for wear or damage.

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 the manufacturer's specific recommendations for your build.

What is the benefit of the lead-free composite material?

The lead-free composite material is an environmentally safe option that still offers reliable performance. It helps meet environmental regulations without compromising the bearing's function in medium-load engines.

Specifications

Brand: King Engine Bearings
Part #: MB5745SI0.25
UPC: 611500578380

King Engine Bearings Subaru FA/FB (Size 0.25 Oversized) Main Bearing Set

Name: King Engine Bearings Subaru FA/FB (Size 0.25 Oversized) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-subaru-fa-fb-size-0-25-oversized-main--t14-45752
Price: 120.58 USD
Availability: BackOrder

$120.58

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King Engine Bearings Subaru FA/FB (Size 0.25 Oversized) Main Bearing Set. Lead-free composite bearings for medium-load engines.

Key Features

Fits a wide range of Subaru FA/FB engines, including models like the BRZ, Forester, and WRX.
Main bearing set is 0.25mm oversized, suitable for engines with machined crankshaft journals.
Constructed with a bi-metal aluminum material for durability.
Features a lead-free composite layer for environmentally safe operation.
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

This is a set of King Engine Bearings main bearings, specifically sized 0.25mm oversized for Subaru FA/FB engines. You get the main bearings needed to rebuild or service the bottom end of your engine. These bearings are made from a bi-metal aluminum material and feature a lead-free composite layer, making them an environmentally safe choice for medium-load applications.

King Engine Bearings has been specializing in engine bearings since 1960, focusing on providing well-built components. This particular set is designed for engines that require a 0.25mm oversize bearing, often used when the crankshaft journals have been machined down to correct for wear or damage. The lead-free composite construction is a notable update that helps meet environmental standards while still offering reliable performance for engines like those found in the Subaru BRZ, Scion FR-S, and Toyota 86.