What does 'Standard Size' mean for these bearings?

Standard size bearings are meant to be installed when the crankshaft journals are still at their original factory specifications. If the crankshaft has been machined undersize due to wear or damage, you would need a different size bearing.

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

Lead-free materials are more environmentally friendly compared to traditional bearing compositions. This King bearing set uses a composite that is designed to perform well in medium-load engine applications.

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

These bearings are ideal for medium-load engines, suggesting they are well-suited for daily driving and moderate performance use. For extreme racing applications, King may offer specialized bearing lines.

Specifications

Brand: King Engine Bearings
Part #: MB5745SI
UPC: 611500577734

King Engine Bearings Subaru FA/FB Main Bearing Set - Size STD

Name: King Engine Bearings Subaru FA/FB Main Bearing Set - Size STD
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-subaru-fa-fb-main-bearing-set-size-std-t14-45450
Price: 120.58 USD
Availability: InStock

$120.58

In Stock

King Engine Bearings STD size main bearing set. Lead-free composite ideal for medium-load engines.

Key Features

Fits a wide range of Subaru, Scion, and Toyota vehicles including the WRX, BRZ, FR-S, and 86.
Standard (STD) size main bearing set.
Uses a lead-free, environmentally safe composite material.
Constructed with a bi-metal aluminum material.
Ideal for medium-load engines.

⚠️ 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 standard size main bearing set from King Engine Bearings, part number MB5745SI. These bearings are built for engines like those found in many Subaru, Scion, and Toyota vehicles, including popular models like the Subaru WRX, Scion FR-S, and Toyota 86. Main bearings are critical for supporting the crankshaft and ensuring it spins smoothly within the engine block, and a well-built set is essential for engine longevity and performance.

King specializes in bearings, and this set uses a lead-free composite material that's environmentally safe. It's a bi-metal aluminum construction, making it a solid option for medium-load engines. This means they're designed to handle the regular stresses of daily driving and moderate performance use without issue. When you're rebuilding or refreshing an engine, using bearings from a specialist like King can make a notable difference in how the engine runs and how long it lasts.