What does 'Standard Size' mean for these bearings?

Standard size bearings are meant to be installed on a crankshaft that has not been machined or ground undersize. If your crankshaft has been previously serviced and ground to a smaller size, you would need a different size bearing set.

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

These bearings are specifically noted as ideal for low to medium-load engines. For high-performance or racing applications, you would typically look for bearings designed for higher stress and load capacities.

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

The lead-free composite material is an environmentally safe choice. It's also designed to perform well in lower to medium-load engine conditions, providing reliable wear resistance.

Specifications

Brand: King Engine Bearings
Part #: MB5518AM
UPC: 611500197406

King Engine Bearings AMC/Jeep 390 & 401 Crankshaft Main Bearing Set - Size STD

Name: King Engine Bearings AMC/Jeep 390 & 401 Crankshaft Main Bearing Set - Size STD
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-amc-jeep-390-401-crankshaft-main-beari-t14-432172
Price: 65.77 USD
Availability: BackOrder

$65.77

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King Engine Bearings crankshaft main bearing set for AMC/Jeep 390 & 401 engines. Standard size. Built with lead-free composite for low to medium-load engines.

Key Features

Fits a wide range of AMC and Jeep vehicles with 390 and 401 engines.
Standard size main bearing set.
Constructed with a lead-free, environmentally safe composite.
Features a bi-metal aluminum material.
Suitable for low to 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

Built with a lead-free composite material, these King Engine Bearings crankshaft main bearings are a solid option for AMC and Jeep engines with 390 and 401 cubic inch displacements. This bi-metal aluminum construction is ideal for engines that don't see extreme loads, offering reliable performance where it's needed most.

King Engine Bearings has been specializing in engine bearings since 1960, focusing on supplying well-built components. This standard size set is designed to fit a wide range of AMC and Jeep vehicles, including models like the Jeep CJ series, AMC Javelin, and Jeep Grand Wagoneer, ensuring your engine's crankshaft is properly supported.