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ACL Race Series 5M8309HOS2-STD High Performance Main Bearings for Subaru EJ20/EJ22/EJ25 0.002mm Oversized - 5M8309HOS2-STD
ACL Race Series 5M8309HOS2-STD High Performance Main Bearings for Subaru EJ20/EJ22/EJ25 0.002mm Oversized - 5M8309HOS2-STD - Image 2 ACL Race Series 5M8309HOS2-STD High Performance Main Bearings for Subaru EJ20/EJ22/EJ25 0.002mm Oversized - 5M8309HOS2-STD - Image 2

ACL 5M8309HOS2-STD High Performance Main Bearings

The ACL 5M8309HOS2-STD main bearings are engineered for those who demand reliability and performance from their Subaru EJ20, EJ22, and EJ25 engines. These high-performance tri-metal bearings are designed to withstand the rigors of high RPM environments, making them a solid choice for both street and race applications.

Key Features

  • High Strength Overlay Plate: Features a reduced thickness that enhances fatigue resistance, crucial for high-stress scenarios.
  • Hardened Steel Backs: All rod bearings come with hardened steel backs, improving support for the bearing lining and ensuring secure retention in the housing.
  • Increased Crush: Enhanced crush characteristics improve bearing retention, providing stability under load.
  • Optimized Heat Transfer: The elimination of flash plating on the back of the bearings allows for better heat dissipation, maximizing grip between the bearings and housing.
  • Increased Eccentricity: Compensates for bore distortion at high RPM, aiding in the formation of hydrodynamic oil films essential for lubrication.
  • 3/4 Grooved Design: Main bearings are designed with 3/4 grooves to optimize load carrying surface area and enhance oil flow to the conrod bearings.
  • Tight Wall Tolerances: Consistent wall tolerances help maintain precise clearances, crucial for engine performance.
  • Enlarged ID Chamfers: Bearing edges are chamfered to accommodate large fillet radii found on performance crankshafts.

Specifications

  • Size: STD
  • Oil Clearance: Standard
  • Half Type: Identical Halves
  • Material: Tri-metal with hardened steel backs
  • Min Standard Shaft Size: 2.3616 in / 59.984 mm
  • Max Standard Shaft Size: 2.3622 in / 60 mm
  • Min Standard Tunnel Size: 2.5197 in / 64 mm
  • Max Standard Tunnel Size: 2.5205 in / 64.02 mm
  • Max Wall at Crown: 0.0789 in / 2.005 mm
  • Max Overall Length: 0.748 in / 19 mm

Upgrade your engine's reliability and performance with the ACL 5M8309HOS2-STD main bearings, specifically designed for high-performance applications in Subaru EJ20, EJ22, and EJ25 engines.

Other Part Numbers:
ACL #acl5M8309HOS2-STD

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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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