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SKU: 5M1573H-STD | UPC: 9315726470220
ACL Race Series Main Bearing Set (Standard Size) – BMW N63B44 / S63B44 4.4L V8 (2009-2018)
The ACL Race Series Main Bearing Set (5M1573H-STD) is a high-performance standard-size main bearing kit engineered for the BMW N63B44 and S63B44 4.4L V8 engines. These bearings are manufactured using advanced materials and precision tolerances specifically for high-performance and racing applications. They provide superior load capacity, reduced friction, and excellent durability under extreme conditions compared to standard OEM bearings. The Race Series design is ideal for modified or high-output engines, offering improved oil clearance control and longevity in demanding use. This set is a direct replacement for the factory main bearings.
Key Features
- Race Series Design – Optimized for high-performance and racing applications
- Standard Size – Direct replacement with precise factory dimensions
- High Load Capacity – Superior strength and durability for boosted or high-RPM engines
- Reduced Friction – Advanced material composition for better efficiency and heat management
- Precision Tolerances – Ensures proper oil clearance and long-term reliability
| Spec | Detail |
|---|---|
| Part Number | 5M1573H-STD |
| Brand | ACL Race Series |
| Type | Main Bearing Set (Standard Size) |
| Compatibility | BMW N63B44 / S63B44 4.4L V8 |
| Engine Codes | N63B44, S63B44 (4395cc V8 DOHC 4v) |
| Material | High-Performance Tri-Metal Race Bearings |
| Country of Origin | Australia |
| Warranty | ACL Standard Warranty |
Whats Included
- Complete Set of Main Bearings (Standard Size)
Product Notes
- Designed for high-performance and racing use on BMW N63B44 and S63B44 4.4L V8 engines
- Provides superior load handling and durability compared to stock bearings
- Professional engine builder installation recommended with proper clearance checks
Installation Notes
- Requires professional engine disassembly and installation
- Precise measurement and clearance checks are essential
- Recommended for performance builds or engine rebuilds
This Part Fits
| Year Range | Make | Model | Trim / Engine | Notes |
|---|---|---|---|---|
| 2009-2012 | BMW | 750i | Base 4.4L V8 (N63B44) | Race Series Main Bearing Set (Standard Size) |
| 2013-2016 | BMW | M5 | Base 4.4L V8 (S63B44) | Race Series Main Bearing Set (Standard Size) |
| 2012-2018 | BMW | M6 | Base 4.4L V8 (S63B44) | Race Series Main Bearing Set (Standard Size) |
| 2015-2018 | BMW | X5 M | Base 4.4L V8 (S63B44) | Race Series Main Bearing Set (Standard Size) |
| 2011-2013 | BMW | X5 xDrive50i | 4.4L V8 (N63B44) | Race Series Main Bearing Set (Standard Size) |
| 2015-2018 | BMW | X5 xDrive50i | 4.4L V8 (N63B44) | Race Series Main Bearing Set (Standard Size) |
Why Choose ACL Race Series Bearings?
- Engineered for high-load, high-RPM, and boosted applications
- Superior material composition and precision tolerances for reliability
- Trusted by professional engine builders worldwide
Frequently Asked Questions
-
Q: Are these standard size bearings?
A: Yes, this is the standard size (STD) set for the BMW N63B44 and S63B44 4.4L V8 engines. -
Q: Are these suitable for high-horsepower builds?
A: Yes, the Race Series bearings are designed for high-performance and racing applications with excellent load capacity. -
Q: Is professional installation required?
A: Yes, proper engine disassembly, measurement, and clearance checks by an experienced engine builder are essential.
Shipping & Handling
- Method: Ground UPS or FedEx
- Availability: In stock – ships same or next business day
- Packaging: Official ACL retail packaging
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