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ACL High Performance Rod Bearing Set for Subaru EJ20/EJ22/EJ25, 48mm Journal Size, Standard Size - 4B8320H-STD

ACL Race Series Engine Bearings - Part Number 4B8320H-STD

If you're looking to enhance the performance of your engine, the ACL Race Series Engine Bearings (4B8320H-STD) are engineered specifically for high RPM applications. These trimetal bearings are designed with automotive enthusiasts in mind, ensuring durability and reliability under extreme conditions. Whether you're upgrading your 2003 Subaru WRX or fine-tuning your 2015 Ford Mustang GT, these bearings are a solid choice for anyone looking to push their engine to the limit.

Fitment

The ACL 4B8320H-STD bearings are compatible with a range of 4, 6, and 8-cylinder engines. Make sure to check your specific model for the perfect fit. These bearings are particularly popular among:

  • 2003-2007 Subaru WRX
  • 2015 Ford Mustang GT
  • 1999-2004 Ford Mustang Cobra

Key Features

  • High-strength overlay plate with reduced thickness for improved fatigue resistance, ensuring longevity even under demanding conditions.
  • Hardened steel backs on all rod bearings provide enhanced support for the bearing lining, improving retention within the housing.
  • Increased crush for better bearing retention, minimizing the risk of failure during high-performance use.
  • Flash plating elimination on the back of the bearings enhances heat transfer, maximizing grip between the bearings and housing.
  • Increased eccentricity compensates for bore distortion at high RPM, promoting the formation of hydrodynamic oil films for smoother operation.
  • 3/4 grooved main bearings optimize load-carrying surface area and oil flow to the conrod bearings, ensuring efficient lubrication.
  • Tight wall tolerances help maintain consistent clearances, which is crucial for performance builds.
  • Enlarged ID chamfers accommodate larger fillet radii on performance crankshafts, making these bearings ideal for aftermarket upgrades.

Specifications

  • Size: STD, .025, .25, 0.5
  • Oil Clearance: Standard
  • Half Type: Identical Halves
  • Material: Tri-metal Hardened Steel Backs
  • Min Std Shaft Size: 1.8891 in / 47.984 mm
  • Max Std Shaft Size: 1.8898 in / 48.000 mm
  • Min Std Tunnel Size: 2.0079 in / 51.000 mm
  • Max Std Tunnel Size: 2.0087 in / 51.020 mm
  • Max Wall at Crown: 0.059 in / 1.498 mm
  • Max Overall Length: 0.6154 in / 15.63 mm

Customer Feedback

Subaru WRX owners have reported significant improvements in engine responsiveness after installing the 4B8320H-STD bearings. One user noted, "After upgrading to the ACL Race Series bearings, my 2005 WRX feels more alive at higher RPMs without any signs of wear even after a full track day." Similarly, a Mustang GT owner commented, "These bearings provided the stability I needed for my boosted setup. No more knocking sounds, just pure power!"

Upgrade your engine's performance with the ACL Race Series Engine Bearings (4B8320H-STD) and experience the difference in your ride. Whether you're hitting the track or just enjoying spirited drives, these bearings are built to perform.

Other Part Numbers:
ACL #acl4B8320H-STD

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⚠ WARNING: Cancer and Reproductive Harm
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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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