What does the '+0.5mm' sizing mean for these bearings?

The '+0.5mm' indicates that these main bearings are slightly larger than standard size. This is necessary when the engine's crankshaft has been machined down (ground undersize) during a rebuild. The larger bearing compensates for the material removed from the crankshaft, helping to restore proper oil clearance.

What is the Alecular material used in these bearings?

Alecular is King Engine Bearings' proprietary racing material. It's known for offering improved strength and durability, making it a suitable choice for performance engines that experience higher loads and stresses.

Do these bearings come with installation hardware?

This product includes the main bearings themselves. It is recommended to consult your vehicle's service manual for a complete list of required hardware and installation procedures for your specific engine rebuild.

Specifications

Brand: King Engine Bearings
Part #: MB5283HP0.5
UPC: 611500469763

King Engine Bearings Performance Main Bearing Set - Size +0.5mm

Name: King Engine Bearings Performance Main Bearing Set - Size +0.5mm
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-performance-main-bearing-set-size-0-5m-t14-4317737
Price: 138.48 USD
Availability: BackOrder

$138.48

On Backorder — Expected to ship by Oct 22, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

King Engine Bearings Performance Main Bearing Set - Size +0.5mm. These main bearings are sized +0.5mm for a precise fit in Ford 4.6L V8 engines.

Key Features

Fits a wide range of Ford 4.6L V8 DOHC/SOHC 24V engines.
Main bearing set is sized +0.5mm for use with a reground crankshaft.
Constructed with King's Alecular racing material for improved strength and durability.
Designed for performance applications and engine rebuilds.

Secure CheckoutFast Shipping631-982-0042

Will this fit your vehicle?

About this part

Product Details

These King Engine Bearings main bearings are built with their Alecular racing material, a strong choice for performance builds. They come sized +0.5mm, which is important for engines that have had their crankshaft ground undersize during a rebuild. This set is designed for a range of Ford vehicles equipped with the 4.6L V8 engine, including popular models like the Ford Mustang, F-150, and Expedition.

The Alecular material offers improved strength and durability compared to standard bearings, making them a solid option for engines that see harder use. When you're rebuilding the bottom end of your 4.6L Ford V8, getting the bearing clearances just right is critical for oil pressure and longevity. Using a set like this, specifically sized for a reground crank, helps ensure you achieve those proper clearances.

This set includes the main bearings needed for your engine rebuild. Always refer to your vehicle's specific service manual for detailed installation procedures and torque specifications.