What does the 'STDX' size designation mean for these bearings?

The 'STDX' designation indicates that these bearings are a standard undersize. This means they are designed to be used with a crankshaft that has been machined down by a specific amount, typically 0.001 inches. It's important to measure your crankshaft journals to confirm this is the correct size for your engine build.

What is the Alecular High Performance compound?

The Alecular High Performance compound is King Engine Bearings' proprietary material blend. It combines a lead-free composite with a bi-metal aluminum base, engineered to offer improved performance and durability under the stresses of an engine.

Are these bearings suitable for a stock engine rebuild?

While these bearings are designed for performance, they can also be used in a stock engine rebuild if the crankshaft journals are within the STDX undersize specification. Their well-built nature offers a durable option for many engine applications.

King Ford Prod. V8 4.6L/5.4L Will Not Fit GT500 (Size STDX) Performance Main Bearing Set

Specifications

Brand: King Engine Bearings
Part #: MB5280HPSTDX
UPC: 611500567445

King Ford Prod. V8 4.6L/5.4L Will Not Fit GT500 (Size STDX) Performance Main Bearing Set

Name: King Ford Prod. V8 4.6L/5.4L Will Not Fit GT500 (Size STDX) Performance Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-ford-prod-v8-4-6l-5-4l-will-not-fit-gt500-size-stdx-pe-t14-260677
Price: 142.71 USD
Availability: BackOrder

$142.71

On Backorder

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King Engine Bearings performance main bearing set for Ford V8 4.6L/5.4L engines. Features lead-free composite and bi-metal aluminum for improved performance.

Key Features

Fits a wide range of Ford, Lincoln, and Avanti vehicles with V8 4.6L and 5.4L engines.
Features a lead-free composite and bi-metal aluminum material for improved performance.
Utilizes King's Alecular High Performance compound for demanding applications.
STDX size indicates a standard undersize, suitable for specific crankshaft applications.
Well-built by King Engine Bearings, specialists in engine bearings since 1960.

⚠️ 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

When you're rebuilding the bottom end of your Ford V8, especially those 4.6L or 5.4L engines, getting the main bearings right is crucial for long-term health and performance. This set from King Engine Bearings is built with their specialized knowledge, focusing on supplying top-tier engine bearings since 1960.

These bearings utilize a lead-free composite and a bi-metal aluminum material, which King calls their Alecular High Performance compound. This construction is designed to handle the demands of performance applications, offering a solid option for your engine build. They are specifically sized as STDX, which is a standard undersize, so make sure this matches your crankshaft requirements.

This set fits a wide range of Ford, Lincoln, and even Avanti vehicles from the mid-90s through the mid-2010s, including popular models like the Ford F-150, Expedition, and Mustang. Always double-check your specific engine and crankshaft dimensions to ensure this STDX size is the correct fit for your project.