ACL 8B1578H-STD Standard Connecting Rod Bearing Set for BMW N63B44 and S63 V8 Engines

BMW N63B44 (4.4L) 4395cc V8 Connecting Rod Set - Standard

Brief Description: The ACL 8B1578H-STD standard connecting rod bearing set is designed for BMW N63B44 and S63 4.4L V8 engines, including applications found in the F10 M5 and F12/F13 M6. Built for high-performance and demanding street or track use, these rod bearings support reliable crankshaft operation and consistent engine performance.

ACL manufactures these bearings with performance-focused materials and precision engineering to help maintain proper oil clearance under demanding operating conditions. The standard-size design is intended for crankshafts that remain within factory specifications and have not been machined undersize. Always verify crankshaft journal condition and bearing clearance before installation.

Fitment: This connecting rod bearing set fits select 2012–2018 BMW M6 models and 2015–2017 BMW X5 models equipped with compatible N63 or S63 V8 engines. Confirm engine code, model year, and bearing requirements before ordering. The set is suitable for BMW N63B44 and related S63 applications when matched to the correct crankshaft and engine configuration.

What's Included: One ACL standard-size connecting rod bearing set for the specified BMW V8 application. Installation should be completed by a qualified technician using the manufacturer’s recommended procedures, torque specifications, and clearance checks.

Features:

• Engine Compatibility: Designed for select BMW N63B44 and S63 4.4L V8 engine applications
• Standard Size: Intended for standard crankshaft journals that meet factory specifications
• High-Performance Design: Engineered to support demanding street, performance, and track applications
• Precision Bearing Construction: Helps promote consistent oil clearance and dependable connecting rod operation

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