What does the '+0.75' size designation mean for these bearings?

The '+0.75' in the part number indicates that these bearings are 0.075 inches larger in diameter than standard size. This means they are intended for use when the crankshaft journals have been machined down by 0.075 inches, typically to correct wear or achieve specific clearances during an engine rebuild.

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

The lead-free composite material is an environmentally safe option that still offers good performance for medium-load engines. It provides a durable bearing surface that works well with the bi-metal aluminum construction.

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

These bearings are specifically noted as ideal for medium-load engines. For high-performance or racing applications, it's always best to consult King Engine Bearings' specialized racing lines or a performance engine builder to ensure the correct bearing material and design for extreme conditions.

King Engine Bearings Ford 281CI/330CI 4.6L/5.4L V8 (Size +0.75) Main Bearing Set

Specifications

Brand: King Engine Bearings
Part #: MB5280SI0.75
UPC: 611500423086

King Engine Bearings Ford 281CI/330CI 4.6L/5.4L V8 (Size +0.75) Main Bearing Set

Name: King Engine Bearings Ford 281CI/330CI 4.6L/5.4L V8 (Size +0.75) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-ford-281ci-330ci-4-6l-5-4l-v8-size-0-7-t14-4336761
Price: 46.72 USD
Availability: BackOrder

$46.72

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King Engine Bearings Ford 281CI/330CI 4.6L/5.4L V8 (Size +0.75) Main Bearing Set. Lead-free composite ideal for medium-load engines.

Key Features

This set is sized +0.75, meaning it's designed for crankshafts machined down by 0.075 inches.
Constructed with a lead-free, environmentally safe composite material.
Features a bi-metal aluminum construction.
Ideal for medium-load engines.
Designed for Ford 281ci and 330ci V8 engines with 4.6L and 5.4L displacements.

⚠️ 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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Will this fit your vehicle?

Product Details

Built with a lead-free, environmentally safe composite material, these main bearings from King Engine Bearings are a solid option for your Ford 281ci or 330ci V8 engine, specifically those with 4.6L or 5.4L displacements. This set is sized +0.75, meaning it's designed to fit crankshafts that have been machined down by 0.075 inches to account for wear or to achieve a specific clearance. King has been specializing in bearings since 1960, focusing on supplying well-built components for engine rebuilding.

The bi-metal aluminum construction offers a good balance of strength and conformability, making it suitable for medium-load applications. These bearings are a direct replacement for many Ford, Lincoln, and Avanti vehicles from the mid-90s through the mid-2010s. When you're rebuilding the bottom end of your engine, getting the main bearings right is crucial for proper crankshaft support and oil pressure. This set is designed to help you achieve that.