ACL 8B1578HX-STDRace Rod Bearing for 2012-2019 BMW M6, X5 xDrive50i, X6 xDrive50

Vehicle Fitment

• 2012-2019 BMW M6 (F12/F13/F06) with S63B44 4.4L V8
• 2012-2019 BMW X5 xDrive50i (F15) with N63B44 4.4L V8
• 2011-2014 BMW X6 xDrive50i (E71) with N63B44 4.4L V8
• 2014-2016 BMW 550i with N63B44 4.4L V8
• 2013-2015 BMW 550i GT with N63B44 4.4L V8
• 2013-2018 BMW 650i with N63B44 4.4L V8
• 2013-2015 BMW 750Li with N63B44 4.4L V8

Features

• Oversize +0.25mm for precision fitment
• Trimetal construction for enhanced durability
• Designed for high-performance applications
• Optimized for high RPM conditions
• Improved fatigue resistance
• Hardened steel backs for better bearing support
• Eliminates flash plating for improved heat transfer
• Increased crush for improved bearing retention

Specifications

• Part Number: 8B1578H-.25
• Size: Oversize +0.25mm
• Material: Trimetal (Steel, Copper, Nickel)
• Compatibility: S63B44/N63B44 4.4L V8 engines
• Quantity: 6 bearings (sufficient for one engine)

Included Components

• 1x ACL 8B1578H-.25 Race Rod Bearing Set (6 bearings)

Product Description

The ACL 8B1578HX-STD Race Rod Bearing Set is engineered for high-performance applications in BMW vehicles equipped with the S63B44 or N63B44 4.4L V8 engines. These oversize bearings (+0.25mm) are designed to provide a precise fitment, ensuring optimal engine performance and longevity.

Manufactured using a trimetal construction of steel, copper, and nickel, these bearings offer enhanced durability and are optimized for high RPM conditions. The hardened steel backs provide better bearing support, while the elimination of flash plating improves heat transfer, reducing operating temperatures and enhancing lubrication.

Ideal for both street and track applications, the ACL 8B1578HX-STD Race Rod Bearing Set is a reliable choice for enthusiasts seeking to maximize engine performance and reliability.