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  See more parts for Subaru Forester
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ACL Subaru RB4125 Small End Bushing, Copper Lead, Semi Size for 1990-2022 Subaru Models - RB4125

ACL Race Series RB4125 Engine Bearings

If you're looking to enhance your Subaru's performance, the ACL Race Series RB4125 Engine Bearings are engineered specifically for high RPM conditions and designed to meet the demands of serious drivers. These Trimetal bearings are perfect for those who push their engines to the limit, offering superior strength and reliability for 4, 6, and 8-cylinder applications.

Features

  • High strength overlay plate with reduced thickness for improved fatigue properties, ensuring durability during intense driving.
  • Hardened steel backs on all rod bearings enhance bearing lining support and retention within the housing.
  • Increased crush for better bearing retention, keeping everything securely in place even under stress.
  • Eliminated flash plating on the back of the bearings enhances heat transfer and maximizes grip between the bearings and housing.
  • Increased eccentricity compensates for bore distortion at high RPM, facilitating the formation of hydrodynamic oil films.
  • 3/4 grooved main bearings optimize load carrying surface area and improve oil flow to the conrod bearings.
  • Tight, consistent wall tolerances help maintain precise clearances for optimal performance.
  • Enlarged ID chamfers on bearing edges accommodate large fillet radii on performance crankshafts.

Specifications

  • Size: Semi
  • Material: Copper Lead

Product Fitment

  • Subaru Forester: 1998-2017
  • Subaru Impreza: 1993-2017
  • Subaru Legacy: 1990-2017
  • Subaru WRX: 2002-2022

Customer Feedback

A Subaru WRX owner shared, "I installed the ACL RB4125 bearings for my 2018 WRX, and the difference was noticeable right away. The engine feels more responsive, especially at higher RPMs. No more worries about bearing wear during my track days!"

Another satisfied customer, who drives a 2015 Subaru Forester, noted, "These bearings gave me the peace of mind I needed for my performance upgrades. They fit perfectly, and I can feel the improved oil flow under stress. Definitely a solid choice for anyone looking to push their engine!"

Other Part Numbers:
ACL #aclRB4125

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Vehicle
1998-2017
 Subaru Forester
1993-2017
 Subaru Impreza
1990-2017
 Subaru Legacy
2002-2022
 Subaru WRX

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Who is ACL?

ACL is a company that specializes in manufacturing and distributing high-quality engine bearings that have played a key role in the Australian automotive parts market. 

Based in Launceston, Tasmania, Australia, the company has been in the business for more than 70 years and has become the leading brand when it comes to its market segment.

Throughout the years, ACL has consistently provided top quality products and has become the equipment supplier of multiple Automotive brands such as Lancia, Mazda, Mini, Mitsubishi, Nissan, Peugeot, Subaru, Toyota, Volvo, Suzuki, Renault, SAAB, and more.  ACL also provides a replacement product range used by the aftermarket industry.

The company ensures that it maintains its high level of standard by employing manufacturing processes that are ISO certified. They also use the industry’s most advanced tooling equipment and designing software that allows them to create products that are superior in quality. ACL has been known worldwide to create bearings that are durable, innovative, and precise.

ACL also offers bearing used for high-performance applications. The company has been involved in motorsport racing since the 1960s and has manufactured bearings used in Brabham Formula 1. Today, their products are being used in different racing disciplines such as the Australian Supercar Championship, Drag racing, Driftings, and Rally.

Purchase ACL Bearings at Vivid Racing

Engine Bearings are a critical component of a vehicle and should not be overlooked. If you want to make sure that what you get is something you could rely on, then ACL is the brand for you. With over 200 engine applications, whether it’s an American, Australian, European, or Asian made vehicle, ACL got you covered. Visit Vivid Racing and check out their list of bearings that would fit your specific needs.

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