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ACL Race Series Main Bearing Set BMW N63 S63
399.99€
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The ACL Race Series Main Bearing Set for BMW’s N63 and S63 engines is made for serious power—the kind that pushes past factory limits and stays there. When twin turbos build boost, heat rises, and the crankshaft spins hard lap after lap, stock bearings can lose their edge. ACL’s Race Series bearings are built for that exact moment—where pressure, precision, and oil control decide how long your engine will keep fighting.
Each bearing uses ACL’s proven tri-metal design: a hardened steel backing for structural rigidity, a copper-lead layer for strength under load, and a precision overlay that keeps the oil film stable even when temperatures soar. That balance keeps friction in check, oil pressure steady, and crank journals protected, no matter how hard your N63 or S63 is pushed.
ACL’s Race Series material has earned its place in high-performance and motorsport builds worldwide. It’s made to resist fatigue, hold consistent clearances, and deliver reliable oil control at high RPM. The result is a smoother, stronger bottom end that stays composed under boost, load, and heat—right where lesser bearings start to fail.
Installation is clean and direct. These bearings are engineered as a perfect OEM-fit replacement for BMW’s twin-turbo V8s found in models like the 550i, 650i, 750i, M5, M6, X5 M, and X6 M. No machining, no hassle—just precise factory geometry paired with race-grade strength.
If you’re building a tuned street car, chasing consistent track performance, or simply protecting a high-output V8 from wear, ACL Race Series bearings are the upgrade that keeps it all together. They reinforce your engine’s foundation, stabilize oil control, and deliver the confidence to run hard, every time you hit boost.
FEATURES
- High-strength overlay plate: Uses a reduced-thickness overlay for enhanced fatigue resistance, helping the bearings withstand the extreme cylinder pressures and high-RPM loads of BMW’s twin-turbo V8 engines.
- Hardened steel backing: Provides superior structural support for the bearing lining and improves retention in the housing, ensuring stability under heavy torque and prolonged boost.
- Increased crush: Enhances bearing grip inside the housing, preventing movement and maintaining alignment under extreme load or temperature swings.
- No flash plating: The elimination of flash plating on the bearing’s back improves heat transfer and maximizes housing grip, promoting better thermal balance and reliability.
- Optimized eccentricity: Increased bearing eccentricity compensates for bore distortion at high RPM, supporting the formation of a strong hydrodynamic oil film that keeps lubrication consistent.
- ¾-grooved main bearings: Improve oil flow to the connecting rod bearings while maintaining the load-bearing surface area required for high-performance crankshaft support.
- Precision wall tolerances: Manufactured to extremely tight and consistent tolerances, ensuring accurate clearances and uniform oil pressure throughout the crankshaft.
- Enlarged ID chamfers: Designed to accommodate large crankshaft fillet radii found in forged or high-performance crankshafts, ensuring smooth rotation and proper oil flow under demanding conditions.
APPLICATIONS
- 2011–2017 BMW N63 F07/F10 550i 550i xDrive
- 2011–2016 BMW S63 F10 M5
- 2011–2015 BMW N63 F06/F12/F13 650i 650i xDrive Alpina B6 xDrive
- 2011–2018 BMW S63 F06/F12/F13 M6 M6 Gran Coupe
- 2011–2015 BMW N63 F01/F02 750i 750i xDrive 750Li 750Li xDrive Alpina B7 B7 xDrive
- 2011–2013 BMW N63 E70 X5 xDrive50i
- 2011–2013 BMW S63 E70 X5 M
- 2011–2014 BMW N63 E71 X6 xDrive50i 50iX ActiveHybrid
- 2011–2014 BMW S63 E71 X6 M
- 2014–2018 BMW N63 F15/F16 X5 xDrive50i X6 xDrive50i
- 2015–2018 BMW S63 F85/F86 X5 M X6 M
- 2018–present BMW N63 G30 M550i xDrive
- 2018–present BMW N63 G05/G06 X5 M50i X6 M50i X5 xDrive50i
- 2019–present BMW N63 G07 X7 M50i X7 xDrive50i
- 2019–present BMW N63 G11/G12 750i 750i xDrive Alpina B7 xDrive
- 2019–present BMW N63 G14/G15/G16 M850i xDrive
- 2017–present BMW S63 F90 M5
- 2019–present BMW S63 F91/F92/F93 M8 M8 Competition
- 2019–present BMW S63 F95/F96 X5 M X6 M
NOTES
Specifications for STD size only.
Includes upper and lower bearing shells for a complete main bearing replacement.
ADDITIONAL INFORMATION:
| Brand | |
|---|---|
| Half Type | Upper & lower |
| Material | F780 |
| Min. Std Shaft Size | 64,971 mm / 2.5579 in |
| Max. Std Shaft Size | 64,99 mm / 2.5587 in |
| Min. Std Tunnel Size | 70 mm / 2.7559 in |
| Max. Std Tunnel Size | 70,019 mm / 2.7566 in |
| Max Wall at Crown | 2,5 mm / 0.0984 in |
| Max Overall Length | 22,25 mm / 0.8760 in (1573H) |
PREPREG is a common term for a reinforcing fabric such carbon which has been pre-impregnated with a resin system. This resin system (typically epoxy) already includes the proper curing agent. As a result, the prepreg is ready to be laid into the mold without the addition of any more resin. In order for the laminate to cure, an autoclave production process is used, a combination of high pressure and heat.
- Maximum strength and performance characterictics. In a hand layup production process, it is difficult to achieve 50% fabric and 50% resin content. Typical hand laminates, even when vacuum bagged, end up with a significant amount of excess resin. Excess resin increases brittleness and reduces overall strength properties. On the other hand, most prepregs contain around 35% resin. This is ideal for maximum cured properties and generally impossible to achieve in normal hand lamination.
- Uniformity and repeatability. The prepreg is of uniform thickness and each part coming out of the mold may theoretically be the same. Vacuum bagging technology may have some errors in processing, but prepreg ensures production consistency.
- Reduce curing time. After the thermal curing cycle, no need to wait for the standard 48 hours can be fully cured.
- Aesthetics. Although prepreg processing still requires mold preparation and demoulding, prepreg processing eliminates air bubbles, makes it easier to obtain a smooth, glossy surface as well as eliminates any seaming lines.
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We offer free tracked shipping on all orders within mainland EU. Orders to remote areas such as Malta, Cyprus, and Iceland may incur a surcharge. Worldwide shipping is also available—please contact us for a quote.
Most orders dispatch within one business day (Monday to Friday). EU delivery takes 3–5 working days from dispatch, and tracking details will be provided via email once your order has shipped.
Please note that import taxes may apply outside the EU, and these are the responsibility of the buyer. Some items may ship directly from our suppliers and may have varying delivery times. If an item is out of stock, we will contact you to discuss the available options.
RETURNS
Changed your mind? You can return unused, uninstalled items in original packaging within 30 days of delivery. Return shipping is the customer’s responsibility unless the item is faulty.
Custom, used, or built-to-order items are non-returnable.
Once we receive and inspect your return, refunds are typically processed within 10 business days.
If your item is damaged or incorrect, contact us within 48 hours with photos and order details.
WARRANTY
All VA and VA Motorsports products come with a 1-year limited warranty covering manufacturing defects and fitment issues. For third-party items, warranty terms vary by brand—please check the product listing or contact us for details.
This warranty does not cover wear and tear, incorrect installation, cosmetic damage, labor, or third-party costs.
To start a claim, email us with your order number, issue description, and photos. If the claim is approved, we’ll offer a replacement, store credit, or a refund.
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