What is the main function of crankshaft main bearings?

Crankshaft main bearings support the crankshaft within the engine block. They allow the crankshaft to rotate smoothly while maintaining proper alignment, which is essential for the engine's operation.

What type of material is used in these bearings?

These bearings feature a specialized overlay material. This material is chosen for its strength and durability, helping to reduce friction and wear during engine operation.

Are these bearings a direct fit for LS-series engines?

Yes, these bearings are designed to fit directly into GM Vortex and Gen III LS-series engines. Proper installation ensures they function correctly within the engine's bottom end.

Specifications

Brand: King Engine Bearings
Part #: MB5875SI
UPC: 611500626494

King Engine Bearings GM Vortex / Gen III LS-Series Crankshaft Main Bearing Set

Name: King Engine Bearings GM Vortex / Gen III LS-Series Crankshaft Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-gm-vortex-gen-iii-ls-series-crankshaft-t14-888563
Price: 96.97 USD
Availability: BackOrder

$96.97

On Backorder — Expected to ship by Sep 16, 2026

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

King Engine Bearings LS-Series crankshaft main bearing set. This set is designed for GM Vortex and Gen III LS engines.

Key Features

This product is a King Engine Bearings GM Vortex / Gen III LS-Series Crankshaft Main Bearing Set.
The part number for this set is MB5875SI.
It is designed for GM Vortex and Gen III LS-series engines.
Features a specialized overlay material for strength and durability.
Helps reduce friction and wear on the crankshaft.

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About this part

Product Details

When you're rebuilding the bottom end of your GM Vortex or Gen III LS-series engine, a solid set of main bearings is crucial. This set from King Engine Bearings, part number MB5875SI, is built to handle the demands of these popular V8s. They play a vital role in supporting the crankshaft, ensuring it spins smoothly and stays properly aligned within the engine block.

King Engine Bearings uses a specialized overlay material that's known for its strength and durability. This overlay helps to reduce friction and wear, which is especially important in high-performance applications or engines that see a lot of miles. The bearings are designed to fit right into your LS-series engine, making installation straightforward for someone familiar with engine work. Getting the right main bearings means you're setting a strong foundation for the rest of your engine build.