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Acl race series connecting rod bearing set bmw n54 n55

Acl race series connecting rod bearing set bmw n54 n55 - image 2

ACL Race Series Connecting Rod Bearing Set BMW N54 N55

339.99€

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EASY RETURNS

SECURE SHOPPING

24/7 SUPPORT

The ACL Race Series Connecting Rod Bearing Set for BMW N54 and N55 engines is built for performance that doesn’t back down. When boost climbs, heat builds, and you keep your foot planted longer than the factory ever expected, stock bearings can become the weak link. ACL’s Race Series bearings are engineered to prevent that — giving your engine the strength and stability it needs under serious power and load.

Each bearing features tri-metal construction: a hardened steel backing for strength, a copper-lead layer for high load capacity, and a precision overlay that keeps a consistent oil film, even at elevated temperatures. This construction minimizes friction and maintains reliable oil pressure across the crank journals, helping your rods and crank stay protected through every pull, gear change, and heat cycle.

ACL’s Race Series material has earned its reputation in motorsport engines worldwide. It resists fatigue and wear under extreme stress, while maintaining smooth oil control and consistent clearances. That means reliable lubrication at high RPM, strong resistance to scoring, and the confidence that your bottom end will hold together under sustained boost or track use.

Designed as a direct-fit replacement for BMW’s N54 and N55 twin-turbo inline-six engines — found in models like the 335i, 135i, 235i, 535i, and M2 — these bearings fit precisely, with no need for machining or modification. The geometry matches OEM specifications, so you get factory precision with race-grade durability.

For anyone running a tuned or high-output N54 or N55 build, these bearings are more than an upgrade — they’re insurance. They strengthen your rotating assembly, stabilize oil pressure, and protect your engine when you’re chasing more power, more boost, and more time at redline. It’s the kind of upgrade you only appreciate once you’ve pushed hard enough to need it.

FEATURES

Performance-engineered design: ACL Race Series bearings deliver a significant upgrade over BMW’s standard rod bearings, built to handle the demanding loads of turbocharged N54 and N55 engines.
Optimized for twin and single-turbo setups: Specifically designed to withstand the increased cylinder pressures, heat, and RPMs produced by tuned and high-boost BMW inline-six engines.
Precision factory tolerances: Manufactured to match OEM specifications for exact clearances, maintaining proper oil film thickness and consistent lubrication under extreme stress.
Advanced tri-metal construction: Combines a hardened steel backing, copper-lead intermediate layer, and precision overlay for exceptional durability and fatigue resistance.
Improved contact stability: The non-tin flash surface enhances bearing-to-housing fitment, preventing distortion and maintaining reliability at sustained high temperatures.
Proven under track and street conditions: Trusted by performance builders worldwide, these bearings offer the strength and consistency needed for tuned, track, and endurance N54/N55 builds.

Acl structure

APPLICATIONS

2007–2010 BMW N54B30 E82/E88 135i
2011–2016 BMW N54B30 E82 1M Coupe
2010–2013 BMW N55B30 E82/E88 135i
2012–2016 BMW N55B30 F20/F21 M135i
2014–2018 BMW N55B30 F22/F23 M235i
2015–2018 BMW N55B30 F87 M2
2006–2010 BMW N54B30 E90/E91/E92/E93 335i
2011–2013 BMW N54B30 E92/E93 335is
2009–2013 BMW N55B30 E90/E91/E92/E93 335i
2012–2017 BMW N55B30 F30/F31 335i
2007–2010 BMW N54B30 E60/E61 535i
2009–2013 BMW N55B30 E60/E61 535i
2011–2017 BMW N55B30 F10/F11 535i
2011–2017 BMW N55B30 F07 535i GT
2012–2018 BMW N55B30 F32/F33/F36 435i
2013–2018 BMW N55B30 F15 X5 sDrive35i xDrive35i
2014–2019 BMW N55B30 F16 X6 xDrive35i
2015–2019 BMW N55B30 F26 X4 xDrive35i
2011–2015 BMW N55B30 F25 X3 xDrive35i
2008–2016 BMW N54B30 E89 Z4 sDrive35i sDrive35is
2008–2010 BMW N54B30 E71 X6 xDrive35i

NOTES

Specifications for STD size only.

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

ADDITIONAL INFORMATION:

Brand	ACL
Half Type	Upper & lower
Material	F781
Min. Std Shaft Size	49,973 mm / 1.9674 in
Max. Std Shaft Size	49,993 mm / 1.9682 in
Min. Std Tunnel Size	53,6 mm / 2.1102 in
Max. Std Tunnel Size	53,616 mm / 2.1109 in
Max Wall at Crown	1,793 mm / 0.0706 in
Max Overall Length	17,55 mm / 0.6909 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.

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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