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ACL High Performance Main Bearing Set 0.50 Oversized for Audi A3, A4, Q3 1998-2022 - 5M1644H-.50
ACL High Performance Main Bearing Set 0.50 Oversized for Audi A3, A4, Q3 1998-2022 - 5M1644H-.50 - Image 2 ACL High Performance Main Bearing Set 0.50 Oversized for Audi A3, A4, Q3 1998-2022 - 5M1644H-.50 - Image 2

If you're diving into the world of high-performance engines, you know that every little detail counts. That’s where the ACL Race Series Engine Bearings come into play. These aren't just any bearings; they’re crafted with a unique blend of design, metallurgy, and engineering that really stands up to the demands of higher RPMs. Whether you're working on a 4, 6, or 8-cylinder setup, these bearings have got your back.

What Makes Them Stand Out:

  • Strong Overlay Plate: The high-strength overlay plate is thinner, which helps it handle fatigue better. Less weight, more resilience.
  • Hardened Steel Backs: All rod bearings come with hardened steel backs. This means better support for the bearing lining and a snug fit in the housing—no one likes loose bearings.
  • Increased Crush: We’ve bumped up the crush for improved retention. You want these bearings to stay put, especially when the engine’s screaming.
  • No Flash Plating: Forget about flash plating on the back. This change boosts heat transfer and ensures a solid grip between the bearings and their housing.
  • Increased Eccentricity: Designed to handle bore distortion at high RPMs, these bearings help create hydrodynamic oil films that keep everything running smoothly.
  • 3/4 Grooved Main Bearings: These are optimized for load distribution and oil flow to the conrod bearings. More oil where it counts!
  • Tight Wall Tolerances: Consistent wall tolerances mean you can maintain those critical clearances with confidence.
  • Enlarged ID Chamfers: We’ve added chamfers on the edges where needed to fit those performance crankshafts perfectly.

Specs You Should Know:

  • Size: Available in STD, .25, .50
  • Oil Clearance: Standard
  • Half Type: Identical Halves
  • Material: Tri-metal with hardened steel backs
  • Min Std Shaft Size: 2.1243 in (53.958 mm)
  • Max Std Shaft Size: 2.1251 in (53.978 mm)
  • Min Std Tunnel Size: 2.3228 in (59.000 mm)
  • Max Std Tunnel Size: 2.3236 in (59.019 mm)
  • Max Wall at Crown: 0.0985 in (2.502 mm)
  • Max Overall Length: 0.728 in (18.49 mm)

Fits These Models:

  • Audi A3 (1998-2009)
  • Audi A4 (1996-2013 & 2015-2022)
  • Audi A4 Quattro (2017-2019)
  • Audi Q3 (2019)

So, if you’re looking to build something that can really take the heat, these ACL Race Series Engine Bearings are worth considering. They’re built for performance and reliability, and they fit a range of popular Audi models. Get ready to push your engine to new heights!

Other Part Numbers:
ACL #acl5M1644H-.50

Proposition 65

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

Vehicle
1998-2009
 Audi A3
1996-2013, 2015-2022
 Audi A4
2017-2019
 Audi A4 Quattro
2019
 Audi Q3

ACL Banner

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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