What is PMaxBlack technology?

PMaxBlack is a technology developed by King Engine Bearings that enhances the load capacity of their bearings. This means the bearings can withstand higher forces without failing, which is crucial for engine performance.

What does 'optimal crush height' mean for these bearings?

Radialock technology helps maintain the optimal crush height. This 'crush' is a slight interference fit that helps seat the bearing securely in the block or cap, preventing it from spinning and ensuring proper oil clearance.

What is the STDX size designation?

STDX refers to a specific size variation for these main bearings. It's important to match this size to your engine's specifications, especially if you are rebuilding or replacing worn components.

Specifications

Brand: King Engine Bearings
Part #: MB509XPSTDX
UPC: 611500530692

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

Name: King Engine Bearings Chevrolet 400 V8 (Size STDX) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-chevrolet-400-v8-size-stdx-main-bearin-t14-770496
Price: 101.04 USD
Availability: BackOrder

$101.04

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 (Size STDX) Main Bearing Set. Built for superior load capacity.

Key Features

Fits 87+ vehicle make/model combinations.
Features PMaxBlack technology for superior load capacity.
Incorporates Radialock for optimal crush height.
Constructed with a tri-metal copper-based material.
Main bearing set for Chevrolet 400 V8 engines.
Size STDX.

⚠️ 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

King Engine Bearings has been specializing in engine bearings since 1960, focusing on supplying the highest quality bearings available. This main bearing set, part number MB509XPSTDX, is designed for Chevrolet 400 V8 engines and comes in the STDX size. It's a well-built option for rebuilding or repairing your engine's bottom end.

These bearings feature King's PMaxBlack technology, which helps them handle superior load capacity. They also incorporate Radialock, a design element that helps maintain optimal crush height for a secure fit. The tri-metal copper-based material offers a solid foundation for durability and performance in your engine.

This set fits a wide range of vehicles, including many Chevrolet models like the Impala, Camaro, and C10 Pickup from the early 70s, as well as some GMC and Avanti models. Always check the full fitment guide to confirm compatibility with your specific vehicle.