What does the 0.25 size designation mean for these bearings?

The 0.25 size indicates that these main bearings are 0.25mm undersize. This means they are intended for use when the engine's crankshaft has been machined down by 0.25mm during a rebuild or repair process.

What is PMaxBlack technology?

PMaxBlack is a proprietary overlay material developed by King Engine Bearings. It is designed to increase the bearing's load-carrying capacity, making it suitable for performance applications where engines experience higher stresses.

Are these bearings suitable for a stock engine rebuild?

Yes, these bearings are well-suited for both stock and performance engine rebuilds. Their advanced materials and design features offer improved durability and load handling compared to standard bearings.

Specifications

Brand: King Engine Bearings
Part #: MB7039XP0.25
UPC: 611500542770

King Engine Bearings BMW M20/M50 2.0L/2.5L/2.7L (Size 0.25) Performance Main Bearing Set

Name: King Engine Bearings BMW M20/M50 2.0L/2.5L/2.7L (Size 0.25) Performance Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-bmw-m20-m50-2-0l-2-5l-2-7l-size-0-25-p-t14-4339653
Price: 148.93 USD
Availability: BackOrder

$148.93

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King Engine Bearings performance main bearing set for BMW M20/M50 2.0L-2.7L engines. Size 0.25. Features PMaxBlack for superior load capacity.

Key Features

Fits a wide range of BMW M20, M50, and M52 engines from 1982-2008.
Main bearing set is 0.25mm undersize for use with machined crankshafts.
Features King's PMaxBlack overlay for superior load capacity.
Tri-metal copper-based material offers a strong foundation for performance.
Radialock feature helps maintain optimal crush height for proper fitment.

⚠️ 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

Built with a tri-metal copper-based material, this main bearing set from King Engine Bearings is designed for enhanced load capacity. These bearings are a popular choice for BMW M20, M50, and M52 engines, covering displacements from 2.0L up to 2.7L. They are specifically sized at 0.25mm undersize, which is crucial for engines that have been machined during a rebuild.

King Engine Bearings specializes in creating high-performance engine bearings, and this set incorporates their PMaxBlack technology. This advanced overlay material helps to increase the bearing's ability to handle higher loads without compromising its structural integrity. The Radialock feature also helps to maintain optimal crush height, ensuring a snug fit and proper oil control within the engine block. This set fits a wide range of BMW models, including popular choices like the E30, E36, and E46 generations.