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ACL Engine Bearings Main Bearing Set 1781cc/1984cc STD for Audi A3 A4 Q3 2019-2022 - 5M1644HX-STD
ACL Engine Bearings Main Bearing Set 1781cc/1984cc STD for Audi A3 A4 Q3 2019-2022 - 5M1644HX-STD - Image 2 ACL Engine Bearings Main Bearing Set 1781cc/1984cc STD for Audi A3 A4 Q3 2019-2022 - 5M1644HX-STD - Image 2

5M1644HX-STD | ACL VW/Audi 1781cc/1984cc Standard Size High Performance w/ Extra Oil Clearance Main Bearing Set 19-09

ACL 5M1644HX-STD Main Bearing Set

The ACL 5M1644HX-STD Main Bearing Set is engineered for those who demand precision and durability in high-performance applications. These trimetal engine bearings are specifically designed to handle the rigors of higher RPM environments, making them an essential upgrade for your engine build.

Key Features

  • High-strength overlay plate with reduced thickness enhances fatigue resistance, ensuring longevity under extreme conditions.
  • Hardened steel backs on all rod bearings provide superior support for the bearing lining, facilitating better retention within the housing.
  • Increased crush improves bearing retention, reducing the risk of movement during operation.
  • Elimination of flash plating on the back of the bearings optimizes heat transfer, maximizing the grip between the bearings and their housing.
  • Enhanced eccentricity compensates for bore distortion at high RPMs, promoting the formation of hydrodynamic oil films.
  • 3/4 grooved design optimizes the load-carrying surface area and oil flow to connecting rod bearings.
  • Tight, consistent wall tolerances help maintain precise clearances for improved performance.
  • Enlarged ID chamfers accommodate larger fillet radii found on performance crankshafts.

Specifications

  • Size: STD
  • Oil Clearance: +0.001" Extra
  • Half Type: Identical Halves
  • Material: Tri-metal Hardened Steel Backs
  • Min Standard Shaft Size: 2.1243 in / 53.958 mm
  • Max Standard Shaft Size: 2.1251 in / 53.978 mm
  • Min Standard Tunnel Size: 2.3228 in / 59.000 mm
  • Max Standard Tunnel Size: 2.3236 in / 59.019 mm
  • Max Wall at Crown: 0.0980 in / 2.489 mm
  • Max Overall Length: 0.728 in / 18.49 mm

Fitment

The ACL 5M1644HX-STD Main Bearing Set is compatible with the following models:

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

Upgrade to the ACL 5M1644HX-STD Main Bearing Set for enhanced performance and reliability in your Audi engine. These bearings are built to withstand the demands of high-performance driving while ensuring optimal oil flow and support.

Other Part Numbers:
ACL #acl5M1644HX-STD

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

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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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