What does the +.25mm size mean for these bearings?

The +.25mm designation indicates that these bearings are slightly larger than standard size. This is typically used when the crankshaft journals have been machined down by 0.25mm during an engine rebuild to ensure a proper, tight fit.

What is PMaxBlack technology?

PMaxBlack is a proprietary technology from King Engine Bearings that enhances the bearing's ability to handle higher loads. This can be beneficial in engines that are driven hard or have been modified for increased performance.

Does this bearing set come with all the necessary hardware for installation?

This product is for the main bearing set only. It does not include any additional hardware or installation tools. Always refer to the manufacturer's installation instructions for a complete list of required components and procedures.

Specifications

Brand: King Engine Bearings
Part #: MB5566XP0.25
UPC: 611500559358

King Engine Bearings Audi A4 1.8L AEB Performance Main Bearing Set - Size +.25mm

Name: King Engine Bearings Audi A4 1.8L AEB Performance Main Bearing Set - Size +.25mm
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-audi-a4-1-8l-aeb-performance-main-bear-t14-30910
Price: 81.97 USD
Availability: BackOrder

$81.97

On Backorder — Expected to ship by Aug 2, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

King Engine Bearings main bearing set, size +.25mm. Features PMaxBlack for superior load capacity.

Key Features

Fits a wide range of Audi and Volkswagen vehicles.
Main bearing set is +.25mm oversize.
Features PMaxBlack technology for superior load capacity.
Includes Radialock for 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

King Engine Bearings has been specializing in engine bearings since 1960, aiming to provide the highest quality available. This main bearing set, sized at +.25mm, is built with a tri-metal copper-based material for durability and performance. It's designed to fit a range of vehicles, including models like the Audi A4, Volkswagen Golf, and Volkswagen Passat.

This set incorporates King's PMaxBlack technology, which helps to increase the bearing's load capacity, making it a solid option for engines that see regular use. It also features Radialock, a design element that helps achieve optimal crush height during installation, ensuring a snug fit and proper oil sealing. These bearings are well-built and ready to help keep your engine running smoothly.