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Acl race series main bearing set bmw s85

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ACL Race Series Main Bearing Set BMW S85

SKU: N/A Categories: ACL, BMW 5 Series Parts & Accessories, BMW 6 Series Parts & Accessories, BMW E60 | E61 Engine & Performance Parts, BMW E60 | E61 Parts & Accessories, BMW E63 | E64 Engine & Performance Parts, BMW E63 | E64 Parts & Accessories, BMW Parts & Accessories, Brands, Engine & Performance, Engine Bearings Tags: ACL, BMW, Engine Bearlings

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24/7 SUPPORT

The ACL Race Series Main Bearing Set for BMW’s S85 engine is built for the kind of driver who refuses to take it easy. The 5.0-liter V10 in the E60 M5 and E63/E64 M6 is a masterpiece—raw, responsive, and happiest when the tach needle sweeps past 8,000 RPM. But when that happens often, oil pressure and bearing wear become a serious concern. That’s exactly what ACL’s Race Series bearings are designed to solve—keeping your S85 strong, smooth, and reliable under the kind of load only a high-revving V10 can create.

Each bearing is built using ACL’s proven tri-metal construction: a hardened steel backing adds strength and stability, a copper-lead intermediate layer absorbs load, and a precision overlay maintains a consistent oil film at high temperature and pressure. This structure keeps friction low, oil control steady, and crankshaft protection constant—even during repeated high-RPM pulls and track abuse.

The Race Series design is the same trusted in motorsport engines around the world. It resists fatigue, holds precise clearances, and keeps oil pressure consistent when heat and stress peak. That means a cooler-running, longer-lasting bottom end and smoother power delivery through every gear.

Installation is clean and straightforward. These bearings are a direct-fit replacement for the S85—no machining, no modifications. They match BMW’s original geometry perfectly, but with the added resilience of race-proven materials and design.

For M5 and M6 owners who expect their engines to perform as hard as they drive, ACL Race Series bearings are the upgrade that makes all the difference. They strengthen the core of the S85, giving you the confidence to chase every rev, lap after lap, with the same relentless precision that made BMW’s V10 legendary.

FEATURES

High-strength overlay plate: Reduced thickness improves fatigue resistance, allowing the bearings to handle the extreme loads and high-rev conditions of the S85 V10.
Hardened steel backs: Provide superior support to the bearing lining and improve retention in the housing during high-RPM operation and heavy acceleration.
Increased crush: Enhances bearing grip and alignment, maintaining stability and preventing movement under intense pressure and temperature cycles.
No flash plating: Eliminating flash plating on the back improves heat transfer and maximizes contact between the bearing and its housing, ensuring better thermal control.
Optimized eccentricity: Compensates for bore distortion at high RPM, helping maintain proper oil film formation and consistent lubrication across the crank journals.
¾-grooved main bearings: Designed to balance oil flow and load distribution, optimizing lubrication to the connecting rod bearings while supporting heavy loads.
Tight wall tolerances: Manufactured with high precision to maintain uniform clearances, ensuring consistent oil pressure and smooth operation.
Enlarged ID chamfers: Accommodate the large fillet radius on performance crankshafts, preventing interference and promoting long-term durability.

Acl structure APPLICATIONS

2005–2010 BMW S85B50 E60 M5 5.0L
2005–2010 BMW S85B50 E63 M6 5.0L
2006–2010 BMW S85B50 E64 M6 5.0L

NOTES

Specifications for STD size only.

Includes upper and lower bearing shells for a complete main bearing replacement.

ADDITIONAL INFORMATION:

Brand	ACL
Half Type	Upper & lower
Material	F780
Min. Std Shaft Size	59,971 mm / 2.3611 in
Max. Std Shaft Size	59,99 mm / 2.3618 in
Min. Std Tunnel Size	65 mm / 2.5591 in
Max. Std Tunnel Size	65,019 mm / 2.5598 in
Max Wall at Crown	2,5 mm / 0.0984 in
Max Overall Length	21,9 mm / 0.8622 in (1581H) 27,95 mm / 1.1004 in (1582H(F))

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.

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.

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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.

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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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