What does STDX sizing mean for these bearings?

STDX sizing indicates that these main bearings are 0.001 inch undersize compared to standard specifications. This is typically used when the engine's crankshaft has been machined to a tighter tolerance during a rebuild.

Are these bearings suitable for a stock engine rebuild?

While designed for performance, these bi-metal bearings are also a strong choice for stock engine rebuilds where reliability and proper crankshaft support are important. Their construction helps manage heat and friction effectively.

What is the material of these main bearings?

These bearings are constructed from a bi-metal aluminum material. This composite is chosen for its strength and ability to handle the high loads and operating conditions found in performance LS-series engines.

Specifications

Brand: King Engine Bearings
Part #: MB5013HPSTDX
UPC: 611500510670

King Engine Bearings GMC LS1 / LS6 / LS3 (Size STDX) Bi-Metal Performance Main Bearing Set

Name: King Engine Bearings GMC LS1 / LS6 / LS3 (Size STDX) Bi-Metal Performance Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-gmc-ls1-ls6-ls3-size-stdx-bi-metal-per-t14-506656
Price: 172.60 USD
Availability: BackOrder

$172.60

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King Engine Bearings performance main bearing set for GM LS1, LS6, and LS3 engines. Size STDX. Verified fitment.

Key Features

Fits 70+ vehicle make/model combinations with GM LS1, LS6, and LS3 engines.
Bi-metal aluminum construction offers strength for performance applications.
STDX sizing indicates a 0.001 inch undersize for use with machined crankshafts.
Lead-free composite material is environmentally safe.
Designed to manage friction and heat in demanding engine conditions.

⚠️ 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

If you're rebuilding the bottom end of your GM LS-series engine, getting the right main bearings is crucial for long-term reliability. This set from King Engine Bearings is built specifically for performance applications, ensuring your crankshaft stays properly supported under demanding conditions. They're a solid option for everything from daily drivers to more spirited builds.

King specializes in bearings, and this set uses a bi-metal aluminum material that's known for its strength and ability to handle high loads. The STDX sizing means these are 0.001 inch undersize, which is often used when a crankshaft has been machined to a tighter tolerance. This construction helps manage friction and heat, which is key for keeping your engine running smoothly and preventing premature wear, especially in performance applications.

This set fits a wide range of GM vehicles equipped with LS1, LS6, and LS3 engines, including popular models like the Chevrolet Corvette, Camaro, and Cadillac CTS. Make sure to check the full fitment list to confirm compatibility with your specific vehicle.