What does 0.25mm undersize mean for these bearings?

This means the bearings are manufactured to be 0.25mm smaller in diameter than standard. They are used when the engine's crankshaft has been machined down by 0.25mm to correct for wear or achieve specific clearances.

What is the XP series from King Engine Bearings?

The XP series is King's performance line, featuring a specialized overlay material. This material is designed to be durable and help maintain a consistent oil film, even under high-pressure conditions.

Do these bearings come with installation instructions?

While these bearings are designed as a direct replacement, it is always recommended to refer to the manufacturer's installation instructions or a qualified mechanic for proper installation procedures and oil clearance specifications.

Specifications

Brand: King Engine Bearings
Part #: MB5778XP0.25
UPC: 611500624179

King Engine Bearings Audi Byt/CDnc/Cczd/Cpsa (Size +0.25mm) Main Bearing Set

Name: King Engine Bearings Audi Byt/CDnc/Cczd/Cpsa (Size +0.25mm) Main Bearing Set
Brand: King Engine Bearings
SKU: king-engine-bearings-king-engine-bearings-audi-byt-cdnc-cczd-cpsa-size-0-25mm-ma-t14-770954
Price: 139.05 USD
Availability: BackOrder

$139.05

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King Engine Bearings Main Bearing Set MB5778XP0.25. These 0.25mm undersize main bearings are for Audi Byt/CDnc/Cczd/Cpsa engines.

Key Features

This is a main bearing set for Audi Byt, CDnc, Cczd, and Cpsa engines.
The bearings are 0.25mm undersize, intended for use with a machined crankshaft.
King's XP series bearings feature a specialized overlay for improved durability and oil film retention.
Helps maintain proper oil clearance and reduce friction in the engine's bottom end.

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About this part

Product Details

If you're rebuilding the bottom end of your Audi Byt, CDnc, Cczd, or Cpsa engine, getting the main bearings right is crucial for long-term health. This set from King Engine Bearings is designed to be a direct replacement for your stock main bearings, but with a specific size adjustment.

This particular set is 0.25mm undersize, meaning it's intended for crankshafts that have been machined down by that amount to correct for wear or to achieve a specific clearance. King is known for making well-built bearings, and their XP series uses a specialized overlay material that's tough and helps maintain oil film under pressure. This helps ensure proper lubrication and reduces friction between the crankshaft and the engine block.

When installing these, make sure your crankshaft journals are clean and within the specified tolerance for this 0.25mm undersize. Proper oil clearance is key to making sure these bearings do their job effectively.