What does the '0.50mm undersize' mean for these bearings?

This means the inside diameter of the bearing is slightly smaller than a standard size. It's intended to be used when the crankshaft journals have been machined down by 0.50mm (0.020 inches) to ensure proper clearance and oil film.

Are these bearings suitable for a daily driver M5?

These are ACL Race Series bearings, which are built for performance. While they can certainly be used in a daily driver, they are designed with higher stress applications in mind and offer robust performance for the S85 V10 engine.

Do I need to purchase anything else to install these bearings?

Yes, you will need to ensure you have the correct engine oil and potentially new main bearing bolts, as these are often replaced during a connecting rod bearing service. Always refer to the manufacturer's service manual for complete installation requirements.

Specifications

Brand: ACL
Part #: 10B1580H-.50

ACL BMW S85B50 5.0L V10 Engine (E60 M5) Race Series Engine Connecting Rod Bearing Set

Name: ACL BMW S85B50 5.0L V10 Engine (E60 M5) Race Series Engine Connecting Rod Bearing Set
Brand: ACL
SKU: acl-acl-bmw-s85b50-5-0l-v10-engine-e60-m5-race-series-engine-connecting-rod-bear-t14-631629
Price: 303.96 USD
Availability: BackOrder

$303.96

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

Fits 2006-2010 BMW M5. ACL Race Series connecting rod bearing set, 0.020 inch undersize, for the S85B50 V10 engine.

Key Features

Fits 2006-2010 BMW M5 and 2006-2010 BMW M6.
ACL Race Series connecting rod bearing set.
Designed for the BMW S85B50 5.0L V10 engine.
Bearings are 0.50mm (0.020 inch) undersize for crankshaft journal reconditioning.
Well-built for reliable performance in demanding applications.

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About this part

Product Details

When you're rebuilding or refreshing the high-performance S85B50 V10 engine in your 2006-2010 BMW M5, the connecting rod bearings are critical. These ACL Race Series bearings are built to handle the demands of this powerful engine, offering a solid option for your build. They come at a 0.50mm, or 0.020 inch, undersize, which is important if you're reconditioning the crankshaft journals.

ACL has a good reputation for making well-built engine components, and this set is no different. They're designed to provide reliable lubrication and wear resistance, even under the stress of a high-revving V10. Because these are a performance-oriented race series bearing, they're a popular choice when the factory bearings just won't cut it anymore, especially if you're looking to get the most out of your engine rebuild.

When installing these bearings, make sure to follow the manufacturer's recommended clearance and lubrication procedures. Proper installation is key to ensuring these bearings perform as expected and last for the long haul in your M5.