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ACL Engine Bearings Main Bearing Set 0.25 Oversized for GM HFV6 3.2L/3.6L 2004+ - 4M2273A-.25
ACL Engine Bearings Main Bearing Set 0.25 Oversized for GM HFV6 3.2L/3.6L 2004+ - 4M2273A-.25 - Image 2 ACL Engine Bearings Main Bearing Set 0.25 Oversized for GM HFV6 3.2L/3.6L 2004+ - 4M2273A-.25 - Image 2

ACL 4M2273A-.25 Oversized Main Bearing Set

The ACL 4M2273A-.25 is engineered for high-performance applications, specifically designed for GM/Cadillac HFV6 engines, including the 3.2L and 3.6L variants produced from 2004 onwards. This main bearing set is a vital component for those looking to rebuild or enhance their engine's performance under demanding conditions.

Key Features

  • Constructed with a high-strength overlay plate that features a reduced thickness, enhancing fatigue resistance during high RPM operation.
  • Hardened steel backs on all rod bearings provide superior support for the bearing lining and assist in retaining the bearings securely within the housing.
  • Increased crush allows for improved bearing retention, ensuring stability during operation.
  • Elimination of flash plating on the back of the bearings enhances heat transfer, optimizing the grip between the bearing and its housing.
  • Designed with increased eccentricity to counteract bore distortion at elevated RPMs, facilitating the formation of hydrodynamic oil films.
  • 3/4 grooved main bearings maximize the load-carrying surface area and improve oil flow to the connecting rod bearings.
  • Maintains tight and consistent wall tolerances to help achieve reliable clearances during installation.
  • Enlarged ID chamfers on the edges of the bearings accommodate larger fillet radii on performance crankshafts, ensuring compatibility with upgraded components.

Product Specifications

  • Size: 0.25 Oversized
  • Increased temperature capacity for enhanced performance under stress
  • Ideal for engine rebuilds, ensuring longevity and reliability
  • Designed specifically for GM HFV6 engines

Other Part Numbers:
ACL #acl4M2273A-.25

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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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