What does 'STD' size mean for these bearings?

STD stands for standard size. This means the bearings are designed to fit a crankshaft that has not been machined undersize. If your crankshaft has been ground undersize for previous repairs, you would need a different size bearing.

What is the main benefit of the bi-metal aluminum material?

The bi-metal aluminum construction is chosen for its high-performance characteristics. This material is known for its strength and ability to handle the stresses within an engine's main bearing system.

Does this bearing set include all the necessary main bearings for an engine?

Yes, this is a main bearing set, which typically includes all the main bearings required for a complete engine installation. It is designed for the specific GM engine displacements and main journal sizes listed.

Specifications

Brand: King Engine Bearings
Part #: MB5511HP
UPC: 611500580369

King Engine Bearings GM 326/350/389/400 w/ 3in Main (Size STD) Main Bearing Set

Name: King Engine Bearings GM 326/350/389/400 w/ 3in Main (Size STD) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-gm-326-350-389-400-w-3in-main-size-std-t14-45737
Price: 176.42 USD
Availability: BackOrder

$176.42

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King Engine Bearings MB5511HP main bearing set for GM 326, 350, 389, 400 engines with 3in mains. STD size. Offers improved performance with a lead-free composite.

Key Features

Fits 27+ vehicle combinations including Buick Apollo, Chevrolet Corvette, and Pontiac GTO.
Designed for General Motors 326, 350, 389, and 400 cubic inch engines with 3-inch main journals.
Standard (STD) size bearings for use with factory or reconditioned crankshafts.
Constructed with a lead-free, environmentally safe composite bi-metal aluminum material.
Specialized bearing design from King Engine Bearings, a company focused on engine bearings since 1960.

⚠️ 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

This is a standard size main bearing set from King Engine Bearings, part number MB5511HP. It's designed for a range of General Motors engines, including popular V8s like the 326, 350, 389, and 400 cubic inch displacements, specifically those with a 3-inch main journal diameter. King has been specializing in engine bearings since 1960, focusing on supplying well-built components for engine rebuilding.

These bearings utilize a lead-free, environmentally safe composite bi-metal aluminum material. This construction is chosen for its high-performance characteristics, aiming to provide a solid foundation for your engine's rotating assembly. They are a standard size, meaning they are intended for use with an unmachined or freshly machined crankshaft that is still at its original factory dimensions.

This set is suitable for many classic GM vehicles. If you're rebuilding the bottom end of a compatible engine, these bearings offer a well-made option from a specialist manufacturer.