What does STDX size mean for these main bearings?

STDX size indicates that these bearings are 0.0005 inches larger in diameter than standard bearings. This is often used when the engine's main journals have been machined or show some wear, allowing for a tighter, more precise fit and improved oil pressure.

What is the overlay material on these bearings?

The bearings feature a high-performance overlay material. This layer is designed to withstand the pressures and stresses found in a rebuilt engine, contributing to the bearing's durability and longevity.

Are these bearings sold individually or as a set?

This product is a main bearing set, meaning it includes all the necessary bearings to replace the main bearings for your Chevrolet 400 V8 engine.

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Specifications

Brand: King Engine Bearings
Part #: MB509GPCSTDX
UPC: 611500616686

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-t14-770494
Price: 262.71 USD
Availability: BackOrder

$262.71

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King Engine Bearings Chevrolet 400 V8 (Size STDX) Main Bearing Set. STDX size bearings for a precise fit.

Key Features

Fits Chevrolet 400 V8 engines.
STDX size bearings are 0.0005 inches larger than standard for improved oil pressure.
High-performance overlay material for durability.
Designed for rebuilt or worn engines needing tighter clearances.
Part number MB509GPCSTDX.

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About this part

Product Details

If you're rebuilding the bottom end of your Chevrolet 400 V8, a solid set of main bearings is crucial. This set from King Engine Bearings, part number MB509GPCSTDX, is specifically made for that engine. These are the STDX size bearings, which means they are 0.0005 inches larger than standard, offering a tighter clearance for improved oil pressure and performance in engines that have been machined or have some wear.

King Engine Bearings are well-built and known for their performance. They use a high-performance overlay material that's designed to handle the stresses of a rebuilt engine. The STDX sizing is a key feature here, providing a more precise fit than standard bearings, which is important for maintaining consistent oil film thickness and reducing wear over time. This set is a solid option for anyone looking to ensure the longevity and proper operation of their Chevrolet 400 V8's crankshaft assembly.