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Acl race series connecting rod bearing set bmw s14
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ACL Race Series Connecting Rod Bearing Set BMW S14

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189.99€

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The ACL Race Series Connecting Rod Bearing Set for BMW S14 engines is built for those who demand more from their E30 M3. The iconic 2.0, 2.3, and 2.5-liter S14 engines were born to rev—but once compression rises, temperatures climb, and the car spends serious time on track, factory bearings can start to give up. ACL’s Race Series bearings step in where stock parts fall short, offering strength and reliability under the kind of pressure the S14 is famous for.

Each bearing is crafted with ACL’s tri-metal construction: a hardened steel backing for rigidity, a copper-lead core for strength, and a precision overlay that maintains a stable oil film even at high temperature and load. This proven design keeps friction low, oil pressure consistent, and the crankshaft and rods safely protected through every pull, corner, and gear change.

The Race Series material has been tested in motorsport engines across the world, delivering outstanding fatigue resistance and dimensional stability. These bearings maintain tight clearances and smooth oil flow under the extreme conditions of tuned or high-revving S14 engines—exactly what you want when pushing your E30 M3 to its limits.

Installation is straightforward. The bearings are a direct-fit replacement for BMW S14B20, S14B23, and S14B25 engines—no machining, no modification—just a perfect fit with OEM precision and race-grade durability.

For E30 M3 owners chasing both performance and reliability, ACL Race Series bearings are the quiet safeguard that keeps the legendary S14 spinning strong. They reinforce the heart of your engine, keeping it smooth, cool, and confident—lap after lap, mile after mile.

ADDITIONAL INFORMATION:

Brand

Half Type

Identical halves
Material

F781
Min. Std Shaft Size

47,975 mm / 1.8888 in
Max. Std Shaft Size

47,991 mm / 1.8894 in
Min. Std Tunnel Size

52 mm / 2.0472 in
Max. Std Tunnel Size

52,015 mm / 2.0478 in
Max Wall at Crown

1,993 mm / 0.0785 in
Max Overall Length

20 mm / 0.7874 in

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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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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ACL Race Series Connecting Rod Bearing Set BMW S14
ACL Race Series Connecting Rod Bearing Set BMW S14
189.99€