What is the STDX material used in these bearings?

The STDX material is a tri-metal construction that King Engine Bearings uses for its performance applications. It offers a strong combination of wear resistance and the ability to conform to the crankshaft journal, helping to maintain proper oil clearance.

Are these bearings suitable for a stock engine rebuild?

While these bearings are built for performance, their robust construction and ability to maintain oil clearance make them a solid option for stock rebuilds as well, especially if you plan on occasional spirited driving or want added durability.

What is the significance of the '24' in the part number MB556TFC24LSTDX?

The '24' in the part number typically refers to specific design features and dimensions tailored for the intended application, in this case, the Chevrolet Gen IV, V, and VI big block engines. It ensures the correct profile and clearances for these particular engine families.

Specifications

Brand: King Engine Bearings
Part #: MB556TFC24LSTDX
UPC: 611500619915

King Engine Bearings Chevrolet 396-502 Gen Iv/V/Vi- 24 Lowers (Size STDX) Main Bearing Set

Name: King Engine Bearings Chevrolet 396-502 Gen Iv/V/Vi- 24 Lowers (Size STDX) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-chevrolet-396-502-gen-iv-v-vi-24-lower-t14-770849
Price: 526.16 USD
Availability: BackOrder

$526.16

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King Engine Bearings STDX main bearing set for Chevrolet 396-502 Gen IV/V/VI. Built for performance builds.

Key Features

Fits Chevrolet 396, 427, 454, and 502 Gen IV, V, and VI big block engines.
STDX tri-metal material offers a strong balance of wear resistance and conformability.
Designed to handle the demands of performance engine builds.
Helps maintain consistent oil clearance for proper lubrication.
Specialized overlay resists fatigue and abrasion.
Part number MB556TFC24LSTDX.

This main bearing set is designed for Chevrolet 396, 427, 454, and 502 engines from the Gen IV, V, and VI families. Always verify fitment with your specific engine application.

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About this part

Product Details

If you're rebuilding the bottom end of a Chevrolet 396, 427, 454, or 502 big block engine, getting the main bearings right is crucial for long-term reliability and performance. These King Engine Bearings main bearing set, specifically the MB556TFC24LSTDX, are designed for the Gen IV, V, and VI engine families, offering a solid foundation for your build. They are built with a focus on handling the demands of performance applications, ensuring your crankshaft spins smoothly and stays protected.

What sets these bearings apart is their STDX material and design. This is a tri-metal material that offers a good balance of strength and conformability, allowing it to adapt to minor imperfections in the crankshaft journal while still providing robust wear resistance. The '24' in the part number refers to the specific design features tailored for these Chevy big blocks, ensuring a proper fit and function. King uses a specialized overlay that resists fatigue and abrasion, which is important for engines that see higher loads or operate at higher RPMs. This well-built construction helps to maintain consistent oil clearance, a critical factor in preventing bearing failure and ensuring proper lubrication.

When installing these bearings, it's important to ensure your crankshaft journals are clean, smooth, and within the specified tolerances. Using the correct assembly lube is also key to protecting the bearing surfaces during initial startup. This set is designed as a direct replacement for the main bearings in the specified Chevrolet big block engines, making the installation process straightforward for someone familiar with engine rebuilding. Proper installation and a clean build environment will help these King bearings perform as intended for many miles to come.