What is the main function of main bearings?

Main bearings support the crankshaft within the engine block. They create a low-friction surface for the crankshaft to rotate on, helping to maintain proper oil pressure and reduce wear.

What does 'STD' size mean for these bearings?

STD refers to standard size. This means the bearings are designed to fit a crankshaft and block that have not been machined or modified beyond their original factory specifications.

What is PMaxBlack technology?

PMaxBlack is a technology developed by King Engine Bearings that enhances the bearing's ability to withstand higher loads. It's designed to provide improved durability in performance or demanding applications.

Specifications

Brand: King Engine Bearings
Part #: MB7039XP
UPC: 611500542749

King Engine Bearings BMW M20/M50 2.0L/2.5L/2.7L Performance Main Bearing Set - Size STD

Name: King Engine Bearings BMW M20/M50 2.0L/2.5L/2.7L Performance Main Bearing Set - Size STD
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-bmw-m20-m50-2-0l-2-5l-2-7l-performance-t14-4339650
Price: 148.93 USD
Availability: InStock

$148.93

Only 3 left in stock

King Engine Bearings main bearing set for BMW M20/M50 engines. STD size, PMaxBlack and Radialock technology.

Key Features

Fits 25+ vehicle combinations including BMW 325i, 328is, and 525i.
Standard size main bearing set.
Features King's PMaxBlack technology for superior load capacity.
Radialock design helps achieve optimal crush height.
Constructed with a tri-metal copper-based material.

⚠️ 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 set of standard size main bearings from King Engine Bearings, designed for BMW M20, M50, and related engines. These bearings are a key component in your engine's rotating assembly, supporting the crankshaft and ensuring it spins smoothly. If you're rebuilding your engine or addressing bottom-end noise, a fresh set of well-built bearings is essential for proper oil pressure and long-term durability.

King specializes in bearings, and this set features their PMaxBlack technology, which helps handle higher loads, and Radialock design for optimal crush height. The tri-metal copper-based material offers a solid foundation for performance applications. These bearings fit a range of BMW models, including the E30 325i, E36 325is, and E39 528i, among many others.