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  See more parts for Audi A3
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ACL High Performance Main Bearing Set 1781cc/1984cc Standard Size for Audi A3/A4/Q3 1996-2022 - 5M1644H-STD
ACL High Performance Main Bearing Set 1781cc/1984cc Standard Size for Audi A3/A4/Q3 1996-2022 - 5M1644H-STD - Image 2 ACL High Performance Main Bearing Set 1781cc/1984cc Standard Size for Audi A3/A4/Q3 1996-2022 - 5M1644H-STD - Image 2

ACL Race Series Engine Bearings (Part Number: 5M1644H-STD)

If you're looking to enhance your engine's performance, the ACL Race Series Engine Bearings are engineered for serious power. These high-performance Trimetal bearings are designed to handle the demands of higher RPM conditions, making them an excellent choice for Audi owners who want to push their vehicles to the limit. Whether you’re tuning your A3, A4, or Q3, these bearings ensure that your engine runs smoothly and efficiently under pressure.

Features

  • High-strength overlay plate with reduced thickness for enhanced fatigue resistance.
  • Hardened steel backs on all rod bearings provide superior support and retention in the housing.
  • Increased crush for improved bearing retention, ensuring stability during high-performance driving.
  • Flash plating elimination on the back of the bearings enhances heat transfer and grip.
  • Increased eccentricity compensates for bore distortion at high RPM, helping to form hydrodynamic oil films.
  • 3/4 grooved Main Bearings optimize load-carrying surface area and oil flow to conrod bearings.
  • Tight wall tolerances maintain consistent clearances, crucial for high-performance applications.
  • Enlarged ID chamfers accommodate large fillet radii on performance crankshafts.

Technical Specifications

  • Size: STD, .25, .50
  • Oil Clearance: Standard
  • Half Type: Identical Halves
  • Material: Tri-metal 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

Product Fitment

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

Customer Feedback

Audi A4 owners have reported significant improvements in engine performance after installing the ACL Race Series Engine Bearings. One owner noted, "After swapping out my stock bearings for these ACL ones, I noticed a smoother rev range and better oil flow during spirited drives. They fit perfectly and have held up great even after a few track days!"

Upgrade your Audi's engine reliability and performance with the ACL Race Series Engine Bearings. Designed for those who demand the best, these bearings are a crucial component in achieving your automotive goals.

Other Part Numbers:
ACL #acl5M1644H-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

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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