ACL acl8B1578H-.025 BMW N63/S63 V8 High-Performance Connecting Rod Bearing Set

BMW N63B44 4395cc V8 Connecting Rod Set - .025mm (0.001") undersize

The ACL acl8B1578H-.025 high-performance connecting rod bearing set is designed for BMW N63B44 and S63 V8 engines requiring a 0.001-inch undersize bearing size. Engineered for performance-focused rebuilds and demanding applications, this rod bearing set supports precise crankshaft-to-connecting-rod clearance when used with a crankshaft machined to the specified undersize.

ACL manufactures these bearings with performance-oriented materials and construction to provide dependable load support, wear resistance, and consistent operation under elevated engine loads. The set is suitable for restoring proper bearing clearances during an engine rebuild or for upgrading the bottom end of a compatible BMW V8 application. Always verify crankshaft measurements, bearing housing condition, and manufacturer clearance specifications before installation.

Fitment includes select 2012–2018 BMW M6 and 2015–2017 BMW X5 models equipped with compatible N63 or S63 V8 engines. Vehicle applications can vary by engine version and production configuration, so confirm the engine code and required bearing size before ordering. This product is intended for automotive use and is supplied as one connecting rod bearing set.

What's Included: One ACL high-performance connecting rod bearing set for compatible BMW N63/S63 V8 applications.

Features:

• Engine Compatibility: Designed for compatible BMW N63B44 and S63 V8 engines.
• Bearing Size: 0.001-inch undersize specification for crankshafts machined to the required undersize.
• Performance Construction: Built to support reliable operation under demanding engine loads.
• Rebuild Support: Helps restore precise connecting rod bearing clearance during qualified engine rebuilds.

Fitments:
2011 BMW X6 xDrive50i
2012 BMW M6 Base
2012 BMW X6 xDrive50i
2013 BMW 550i Gt Base
2013 BMW 650i Base
2013 BMW 750Li Base
2013 BMW M6 Base
2013 BMW X5 xDrive50i
2013 BMW X6 xDrive50i
2014 BMW 550i Base
2014 BMW 550i Gt Base
2014 BMW 650i Base
2014 BMW 750Li Base
2014 BMW M6 Base
2014 BMW X5 xDrive50i
2014 BMW X6 xDrive50i
2015 BMW 550i Base
2015 BMW 550i Gt Base
2015 BMW 650i Base
2015 BMW 750Li Base
2015 BMW M6 Base
2015 BMW X5 xDrive50i
2016 BMW 550i Base
2016 BMW 650i Base
2016 BMW M6 Base
2016 BMW X5 xDrive50i
2017 BMW 650i Base
2017 BMW M6 Base
2017 BMW X5 xDrive50i
2018 BMW 650i Base
2018 BMW M6 Base
2018 BMW X5 xDrive50i

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Unknown
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: t
Units Per Sku: 1