What is the size of these main bearings?

These are a 0.050 inch undersize main bearing set. This means they are intended for use with a crankshaft that has been machined down by 0.050 inches to ensure proper clearance.

What is the Tri-M+ Enhanced Babbit Overlay?

The Tri-M+ overlay is an advanced layer applied to the bearing surface. It's designed to enhance durability and wear resistance, particularly beneficial in engines that experience significant loads.

Are these bearings suitable for a performance build?

King Engine Bearings specializes in high-quality components. The Tri-metal construction and Tri-M+ overlay make these bearings a strong option for medium-load engines, including those in performance applications where proper crankshaft machining is done.

King Engine Bearings BMW S85B50A Main Bearing Set (Size .50)

Specifications

Brand: King Engine Bearings
Part #: MB637CA0.5
UPC: 611500598401

King Engine Bearings BMW S85B50A Main Bearing Set (Size .50)

Name: King Engine Bearings BMW S85B50A Main Bearing Set (Size .50)
Brand: King Engine Bearings
Price: 274.60 USD
Availability: InStock

$274.60

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Fits 2006-2010 BMW M5. King Engine Bearings main bearing set with Tri-metal Copper Based Material and Tri-M+ overlay for improved durability.

Key Features

Fits 2006-2010 BMW M5 and 2006-2010 BMW M6.
Main bearing set for the BMW S85B50A engine.
Features a Tri-metal Copper Based Material construction.
Includes Tri-M+ Enhanced Babbit Overlay for improved durability.
Ideal for medium-load engine applications.
This is a 0.050 inch undersize bearing set.

⚠️ 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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Fits these vehicles

BMW M5 2006-2010
BMW M6 2006-2010

Product Details

If you're rebuilding the engine in your 2006-2010 BMW M5, these main bearings from King Engine Bearings are a solid choice. King specializes in bearings and has been making them since 1960, focusing on supplying well-built components for the marketplace. This set is specifically designed for the S85B50A engine found in your M5 and M6 models.

These bearings use a Tri-metal Copper Based Material construction, which is a common and effective choice for many engines. On top of that, they feature King's Tri-M+ Enhanced Babbit Overlay. This overlay is designed to offer improved durability, especially in medium-load engine applications like the high-revving V10 in your M5. This particular set is sized 0.050 inch, which is important to note if you are machining your crankshaft to match.