What does the '+0.25' size mean for these bearings?

The '+0.25' in the part number indicates that these main bearings are 0.25mm undersize. This is typically used when the crankshaft journals have been machined down to correct for wear or damage during an engine rebuild.

What is the benefit of a bi-metal aluminum material for bearings?

Bi-metal aluminum bearings combine the strength and durability of aluminum with other materials to create a strong, wear-resistant surface. This construction is well-suited for the demands of an engine's main bearing application.

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

These bearings are described as ideal for medium-load engines and feature a lead-free composite. While well-built for their intended application, King Engine Bearings offers specialized racing bearings for more extreme conditions.

King Engine Bearings Ford 281CI/330CI 4.6L/5.4L V8 (Size +0.25) Main Bearing Set

Specifications

Brand: King Engine Bearings
Part #: MB5280SI0.25
UPC: 611500423062

King Engine Bearings Ford 281CI/330CI 4.6L/5.4L V8 (Size +0.25) Main Bearing Set

Name: King Engine Bearings Ford 281CI/330CI 4.6L/5.4L V8 (Size +0.25) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-ford-281ci-330ci-4-6l-5-4l-v8-size-0-2-t14-4336759
Price: 39.83 USD
Availability: BackOrder

$39.83

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King Engine Bearings main bearing set MB5280SI0.25 for Ford 4.6L/5.4L V8. 0.25mm undersize.

Key Features

Fits 1992-2011 Ford Crown Victoria, 1997-2014 Ford Expedition, and 1997-2010 Ford F-150, among many other vehicles.
Main bearing set is 0.25mm undersize.
Constructed with a bi-metal aluminum material.
Features a lead-free, environmentally safe composite.
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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Product Details

King Engine Bearings has been specializing in engine bearings since 1960, focusing on supplying the highest quality bearings available. This main bearing set, part number MB5280SI0.25, is designed for Ford 281ci and 330ci 4.6L and 5.4L V8 engines. It's built with a bi-metal aluminum material and features a lead-free composite, making it an environmentally safe option ideal for medium-load engines. This set is 0.25mm undersize, which is important to note if you are rebuilding or replacing worn components.

This bearing set fits a wide range of Ford, Lincoln, and Avanti vehicles, including popular models like the Ford Crown Victoria, Ford Expedition, and Ford F-150. The bi-metal aluminum construction offers good strength and wear resistance for everyday driving conditions. The lead-free composite is a modern approach to bearing material, aiming for durability while meeting environmental standards.