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ACL Race Series 0.50 Oversized Main Bearing Set for GM HFV6 3.2L/3.6L - 2004+ - 4M2273A-.50
ACL Race Series 0.50 Oversized Main Bearing Set for GM HFV6 3.2L/3.6L - 2004+ - 4M2273A-.50 - Image 2 ACL Race Series 0.50 Oversized Main Bearing Set for GM HFV6 3.2L/3.6L - 2004+ - 4M2273A-.50 - Image 2

If you're diving into the world of high-performance engines, you’re going to want to check out the ACL Race Series Engine Bearings. These bad boys are engineered with a unique blend of design and metallurgy that really sets them apart. I’ve had my hands on these bearings, and let me tell you, they’re built to handle the heat—literally. They excel at higher RPMs, making them a solid choice for those who push their engines to the limit.

What really stands out about these bearings is the high-strength overlay plate. It’s thinner than you might expect, but that’s intentional—it improves fatigue properties, which is crucial when you’re running hard. Plus, the hardened steel backs on all rod bearings give you that extra support you need, ensuring the bearing lining stays put in the housing. Nobody wants to deal with a bearing that’s slipped out of place mid-race, right?

Another feature that’s worth mentioning is the increased crush. This isn’t just a fancy term; it means better bearing retention. You want your bearings to stay where they belong, and these do just that. And forget about flash plating on the back; it’s gone. This little change helps with heat transfer and maximizes the grip between the bearings and their housing. It’s all about keeping things cool and efficient.

When you’re revving your engine, bore distortion can be a real headache. That’s why these bearings come with increased eccentricity to help combat that issue and assist in forming hydrodynamic oil films. You’ll also appreciate the 3/4 grooved main bearings, which optimize the load-carrying surface area and enhance oil flow to the conrod bearings. It’s all about keeping your engine lubricated and happy.

Now, let’s talk size. These bearings come in STD and .25 options, and they’re perfect for a rebuild. If you’re working with a GM HFV6 engine—think Cadillac, Commodore, CTS, Malibu, G6, or G8 from 2004 onwards—these .50 oversized main bearings are going to fit right in. They’re designed to handle increased temperature capacity, so you can really push your engine without worrying about overheating.

In short, if you’re serious about performance, the ACL Race Series Engine Bearings are a smart investment. They’re tough, reliable, and designed for those who live life in the fast lane.

Other Part Numbers:
ACL #acl4M2273A-.50

Proposition 65

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

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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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