What material are these main bearings made from?

These main bearings are made from a bi-metal aluminum material with a lead-free, environmentally safe composite. This construction is ideal for engines that experience low to medium loads.

Are these bearings suitable for high-performance or racing engines?

The manufacturer states these bearings are ideal for low to medium-load engines. For high-performance or racing applications, you may need to consult specific performance bearing lines.

What does 'STD' size mean for these bearings?

STD refers to the standard size for the main bearings. This means they are intended to be used when the crankshaft journals are within the manufacturer's original specifications, without any machining or grinding.

King Engine Bearings BMW M20B20-23-25-27/M50B25/M52B20-25-28 Main Bearing Set - Size STD

Specifications

Brand: King Engine Bearings
Part #: MB798AM
UPC: 611500183607

King Engine Bearings BMW M20B20-23-25-27/M50B25/M52B20-25-28 Main Bearing Set - Size STD

Name: King Engine Bearings BMW M20B20-23-25-27/M50B25/M52B20-25-28 Main Bearing Set - Size STD
Brand: King Engine Bearings
Price: 107.03 USD
Availability: InStock

$107.03

Only 4 left in stock

King Engine Bearings main bearing set for BMW M20/M50/M52 engines. Standard size. Ideal for low to medium-load engines.

Key Features

Fits a range of BMW M20, M50, and M52 engines.
Standard size main bearing set.
Constructed with a lead-free, environmentally safe composite.
Features a bi-metal aluminum material.
Ideal for low to medium-load engine applications.

⚠️ 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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Product Details

King Engine Bearings has been specializing in engine bearings since 1960, aiming to provide the highest quality available. This main bearing set is built with a lead-free, environmentally safe composite material, making it a solid option for engines that aren't under extreme load. The bi-metal aluminum construction offers a well-built foundation for your engine's crankshaft.

This set is designed for a standard fit and is suitable for a range of BMW engines, including those found in models like the 325i, 525i, and Z3. If you're rebuilding the bottom end of your BMW and need reliable main bearings, this set from a dedicated bearing specialist is a practical choice.