What is the main journal size for this bearing set?

This King Engine Bearings main bearing set is designed for engines with a 3-inch main crankshaft journal diameter. It's important to verify this measurement on your specific engine before installation.

What does the .001 size designation mean for these bearings?

The .001 designation indicates that these bearings are 0.001 inch undersize compared to a standard size bearing. This is used to achieve specific, tighter clearances during an engine rebuild, often when the crankshaft journals have been machined undersize.

Are these bearings suitable for a performance engine build?

Yes, these bearings are made with a high-performance bi-metal aluminum material and are designed for demanding applications. King Engine Bearings specializes in creating well-built components for engine builds.

King Engine Bearings GM 326/350/389/400 w/ 3in Main (Size .001) Main Bearing Set

Specifications

Brand: King Engine Bearings
Part #: MB5511HP001
UPC: 611500582912

King Engine Bearings GM 326/350/389/400 w/ 3in Main (Size .001) Main Bearing Set

Name: King Engine Bearings GM 326/350/389/400 w/ 3in Main (Size .001) Main Bearing Set
Brand: King Engine Bearings
Price: 186.43 USD
Availability: InStock

$186.43

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King Engine Bearings GM 326/350/389/400 w/ 3in Main (Size .001) Main Bearing Set. High-performance bi-metal aluminum bearings for engine rebuilds.

Key Features

Fits a wide range of GM 326, 350, 389, and 400 cubic inch engines.
Features a bi-metal aluminum material for high performance.
Constructed with a lead-free composite that is environmentally safe.
Main bearing set is sized .001 inch undersize for precise engine assembly.
Designed for 3-inch main crankshaft journals.
From King Engine Bearings, a specialist in bearing manufacturing 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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Will this fit your vehicle?

Product Details

If you're rebuilding the bottom end of your classic General Motors V8, like a 326, 350, 389, or 400, getting the main bearings right is crucial for engine longevity. These King Engine Bearings main bearing sets are built with a bi-metal aluminum material that's designed for high performance, helping to ensure your crankshaft spins smoothly and reliably within the block. They are a solid option for many Pontiac, Chevrolet, Buick, and Oldsmobile models from the 1960s and 70s, and even some later Corvettes.

King has been specializing in bearings since 1960, focusing on creating well-built components. This particular set is made with a lead-free composite that's environmentally safe, while still offering the high-performance characteristics needed for a strong engine build. The bearings are precisely sized at .001 inch undersize, which is important for achieving the correct clearances during your engine assembly. Proper bearing clearance is key to oil flow and preventing premature wear.

When you're putting an engine back together, especially one that's going to see regular use, using quality bearings like these King units can make a notable difference in how the engine performs and how long it lasts. Make sure to check your specific engine's crankshaft journal size to confirm compatibility with the 3-inch main diameter.