What does the STDX sizing mean for these bearings?

STDX sizing indicates that these main bearings are 0.001 inch undersize. This is often used when a crankshaft has been ground undersize during a rebuild to ensure proper clearance and oil film.

What is the benefit of the 360-degree oil groove?

The 360-degree oil groove helps to distribute lubricating oil more evenly around the entire circumference of the bearing surface. This can lead to reduced friction and better heat management, especially under demanding operating conditions.

Are any special tools or materials needed for installation?

While these are main bearings, proper engine rebuilding practices apply. It is recommended to use engine assembly lube and consult your engine's service manual for specific torque specifications and installation procedures.

Specifications

Brand: King Engine Bearings
Part #: MB556TFC24USTDX
UPC: 611500619953

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

Name: King Engine Bearings Chevrolet 396-502 Gen Iv/V/Vi- 24 Uppers (Size STDX) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-chevrolet-396-502-gen-iv-v-vi-24-upper-t14-770850
Price: 526.16 USD
Availability: BackOrder

$526.16

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King Engine Bearings Chevrolet 396-502 Gen IV/V/VI- 24 Uppers (Size STDX) Main Bearing Set

Key Features

Fits Chevrolet 396, 427, 454, and 502 big block engines (Gen IV, V, VI).
Includes a complete set of main bearings for your engine rebuild.
Features King's 360-degree oil groove for improved oil distribution.
STDX sizing means these bearings are 0.001 inch undersize for crankshaft journals.
Designed with '24 Uppers' for specific fitment in Chevrolet big block applications.

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About this part

Product Details

When you're rebuilding the heart of your Chevrolet 396, 427, 454, or 502 big block engine, the main bearings are critical for keeping everything running smoothly and reliably. This set from King Engine Bearings is specifically designed for Gen IV, V, and VI applications, offering a solid option for those looking to restore or enhance their engine's bottom end. You'll receive the complete set of main bearings needed for your build, ensuring each journal is properly supported.

King Engine Bearings is known for its focus on material science and manufacturing precision. These particular bearings feature their unique 360-degree oil groove design, which helps to distribute oil more evenly across the bearing surface. This improved oil flow is important for reducing friction and heat, especially in high-performance or heavy-duty applications. The STDX sizing indicates these are 0.001 inch undersize bearings, which can be helpful for engines that have had their crankshafts ground undersize during a rebuild. The '24 Uppers' designation refers to the specific design of the upper main bearings, tailored for optimal performance within the Chevrolet big block architecture.

Proper installation is key for any engine bearing. It's always recommended to consult your engine's service manual for specific torque sequences and clearances, as well as to ensure your crankshaft journals are within the specified tolerance for these STDX bearings. Using the correct assembly lube and ensuring a clean build environment will also contribute to the longevity and performance of these well-made bearings.