What does the +0.25mm size mean for these bearings?

The +0.25mm designation indicates that these bearings are intended for a crankshaft that has been machined down by 0.25mm. This is typically done to correct wear on the original crankshaft journals. You must ensure your crankshaft has been machined to this specific size before installing these bearings.

What is Manganx strengthening?

Manganx is a process King Engine Bearings uses to strengthen their aluminum bearing materials. This strengthening helps to improve the bearing's durability and resistance to wear, which is important for the longevity of your engine.

Are these bearings environmentally safe?

Yes, these bearings utilize a lead-free composite material. This is part of King Engine Bearings' commitment to environmental safety in their manufacturing processes.

King Engine Bearings BMW N63/S63 Crankshaft Main Bearing Set - Size +0.25mm

Specifications

Brand: King Engine Bearings
Part #: MB5801SM0.25
UPC: 611500596858

King Engine Bearings BMW N63/S63 Crankshaft Main Bearing Set - Size +0.25mm

Name: King Engine Bearings BMW N63/S63 Crankshaft Main Bearing Set - Size +0.25mm
Brand: King Engine Bearings
Price: 206.21 USD
Availability: InStock

$206.21

In Stock

King Engine Bearings BMW N63/S63 Crankshaft Main Bearing Set - Size +0.25mm. Built with Manganx strengthened aluminum for improved durability.

Key Features

Fits a wide range of BMW vehicles including 5 Series, 6 Series, 7 Series, and X models.
Main bearing set sized at +0.25mm for use with a machined crankshaft.
Constructed with a bi-metal aluminum material for solid performance.
Features Manganx strengthened aluminum for improved durability.
Utilizes a lead-free composite material for environmental safety.

⚠️ 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

Secure CheckoutFast Shipping631-982-0042

Will this fit your vehicle?

Product Details

If you're rebuilding the bottom end of your BMW N63 or S63 engine, getting the right main bearings is crucial for long-term health. This set from King Engine Bearings is specifically sized at +0.25mm, meaning it's intended for crankshafts that have been machined down to match this undersize. King has been specializing in bearings since 1960, focusing on producing reliable components for a wide range of vehicles.

These main bearings are constructed with a bi-metal aluminum material that's strengthened by their Manganx process, which helps improve the overall durability and wear resistance. They also utilize a lead-free composite, aligning with environmental safety standards. This well-built set is designed to handle the demands of performance engines like those found in many BMW models, ensuring proper crankshaft support and oil clearance.

This bearing set fits a wide variety of BMW models, including the 5 Series, 6 Series, 7 Series, and X models from the late 2000s through the late 2010s. Always ensure your crankshaft has been properly machined to the +0.25mm size before installing these bearings.