What does the .50 size indicate for these main bearings?

The .50 designation means these bearings are 0.050 inches undersize. This is important because it indicates they are intended for use with a crankshaft that has been machined down by 0.050 inches to a specific journal diameter.

What is the pmax black material and why is it used?

Pmax black is King Engine Bearings' racing line material. It's a tri-metal compound designed for improved strength and wear resistance, making it suitable for engines that experience higher loads and temperatures than stock applications.

Do these bearings come with a warranty?

King Engine Bearings typically offers a limited warranty on their products against manufacturing defects. Please refer to the manufacturer's official documentation for specific warranty terms and conditions.

King Engine Bearings Ford 4.6L/5.4L V8 SOHC (Size .50) Performance Main Bearing Set

Specifications

Brand: King Engine Bearings
Part #: MB5280XP0.5
UPC: 611500537424

King Engine Bearings Ford 4.6L/5.4L V8 SOHC (Size .50) Performance Main Bearing Set

Name: King Engine Bearings Ford 4.6L/5.4L V8 SOHC (Size .50) Performance Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-ford-4-6l-5-4l-v8-sohc-size-50-perform-t14-189599
Price: 167.94 USD
Availability: BackOrder

$167.94

On Backorder — Expected to ship by May 3, 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 Ford 4.6L/5.4L V8 SOHC main bearing set, size .50. Features pmax black racing material for improved durability.

Key Features

Fits 1992-2016+ Ford, Lincoln, and Avanti vehicles with 4.6L and 5.4L SOHC V8 engines.
Features King's pmax black racing material for improved durability and wear resistance.
Main bearing set is .050 inch undersize, intended for use with a machined crankshaft.
Designed for performance applications and engine rebuilds.
Brand: King Engine Bearings
Part Number: MB5280XP0.5

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Will this fit your vehicle?

Product Details

Built with King's pmax black material, this main bearing set is a solid option for your Ford 4.6L or 5.4L V8 engine rebuild. This racing line material is known for its improved durability, making it a good choice for performance applications where the engine might see harder use. These bearings are specifically sized at .050 inch undersize, which is important to note if you're machining your crankshaft to match. They are designed to fit a wide range of Ford vehicles, including popular models like the Crown Victoria, F-150, and Mustang, among many others.

The pmax black construction offers a good balance of strength and wear resistance, helping to protect your crankshaft journals under demanding conditions. When you're rebuilding the bottom end of your engine, especially if you're aiming for improved performance or just want a well-built replacement, a quality main bearing set like this is crucial. King Engine Bearings is a well-known name in the performance and racing world, and this set reflects their focus on materials that can handle higher loads and temperatures.