What does the +0.001 size mean for these bearings?

The +0.001 size indicates that these main bearings are 0.001 inches larger in diameter than standard size. This is typically used when the crankshaft journals have been machined undersize during a rebuild.

What is the benefit of the PMaxBlack overlay?

The PMaxBlack overlay is an advanced feature that significantly increases the bearing's load-carrying capacity. This helps prevent bearing damage and wear under high-stress conditions.

What is the Radialock feature?

Radialock is a design feature that helps maintain the correct crush height of the bearing during installation. This ensures the bearing stays securely in place within the engine block's saddle.

Specifications

Brand: King Engine Bearings
Part #: MB509XP001
UPC: 611500530678

King Engine Bearings Chevrolet 400 V8 (Size +0.001) Main Bearing Set

Name: King Engine Bearings Chevrolet 400 V8 (Size +0.001) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-chevrolet-400-v8-size-0-001-main-beari-t14-515403
Price: 111.59 USD
Availability: BackOrder

$111.59

On Backorder

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

King Engine Bearings Chevrolet 400 V8 Main Bearing Set. Features PMaxBlack for superior load capacity.

Key Features

Fits 78+ vehicle make/model combinations.
Features PMaxBlack overlay for superior load capacity.
Includes Radialock technology for optimal crush height.
Constructed with a tri-metal copper-based material.
Main bearing set is 0.001 inch undersize.

⚠️ 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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About this part

Product Details

Built with a tri-metal copper-based material, this King Engine Bearings main bearing set is designed for Chevrolet 400 V8 engines. The PMaxBlack overlay offers superior load capacity, which is crucial for the main bearings that support the crankshaft. This set is also engineered with Radialock, a feature that helps maintain optimal crush height during installation, ensuring the bearings seat properly. This is a multi-fit application, suitable for a wide range of vehicles including models like the Chevrolet Impala, GMC Jimmy, and Buick Electra from various years.

King Engine Bearings specializes in engine bearings, and this set reflects their focus on providing well-built components. The copper-based tri-metal construction is a standard for performance and durability in engine bearings, offering a good balance of strength and conformability. The PMaxBlack overlay is an advanced feature that enhances the bearing's ability to handle high loads without deforming, which can extend the life of your engine's rotating assembly. The Radialock feature is a practical design choice that aids in installation by providing a controlled amount of crush, helping to prevent the bearing from spinning in its bore.