What does STDX Oversized mean for these bearings?

STDX Oversized indicates that these main bearings are 0.040 inches undersize compared to standard main bearings. This size is used when the engine's crankshaft has been machined down by 0.040 inches to correct wear or runout.

What is PMaxBlack technology?

PMaxBlack is a technology developed by King Engine Bearings that enhances the load-carrying capabilities of the bearings. It helps ensure the bearings can withstand the high pressures and forces within the engine.

Does this bearing set come with installation hardware?

This product is a set of main bearings only. Installation hardware, such as main bearing cap bolts or studs, is typically sold separately and should be sourced according to your vehicle's service manual.

King Engine Bearings Ford V8 351ci 5.8L / 400ci 6.6L 16V (Size STDX Oversized) Main Bearing Set

Specifications

Brand: King Engine Bearings
Part #: MB5505XPSTDX
UPC: 611500532139

King Engine Bearings Ford V8 351ci 5.8L / 400ci 6.6L 16V (Size STDX Oversized) Main Bearing Set

Name: King Engine Bearings Ford V8 351ci 5.8L / 400ci 6.6L 16V (Size STDX Oversized) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-ford-v8-351ci-5-8l-400ci-6-6l-16v-size-t14-672553
Price: 101.90 USD
Availability: BackOrder

$101.90

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King Engine Bearings main bearing set for Ford V8 351ci 5.8L / 400ci 6.6L. STDX Oversized. Features PMaxBlack for superior load capacity.

Key Features

Fits Ford V8 351ci 5.8L and 400ci 6.6L 16V engines.
STDX Oversized size, which is 0.040 inches undersize.
Features PMaxBlack technology for superior load capacity.
Includes Radialock for optimal crush height during installation.
Constructed with a tri-metal copper-based material.

⚠️ 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

This is a King Engine Bearings Main Bearing Set, specifically the MB5505XPSTDX model. You get a complete set of main bearings designed for Ford V8 engines displacing 351 cubic inches (5.8L) or 400 cubic inches (6.6L), including 16-valve configurations. These bearings are sized STDX, meaning they are 0.040 inches undersize, which is important to note if your crankshaft has been machined to match this size.

King Engine Bearings specializes in creating well-built engine bearings, and this set uses a tri-metal copper-based material for its construction. It incorporates PMaxBlack technology, which helps handle superior load capacity, and Radialock features to ensure optimal crush height during installation. These elements work together to provide a solid foundation for your engine's rotating assembly.

This main bearing set fits a wide range of Ford vehicles, including models like the Ford Bronco, F-150, and E-Series vans. Always confirm fitment for your specific application to ensure you're getting the right part for your engine rebuild.