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ACL Race Series Main Bearing Set for Toyota 1RZ, 2RZ, 2TZ, 3RZ Inline 4 Std High Performance - 5M8378HX-STD

ACL 5M8378HX-STD Main Bearing Set

The 5M8378HX-STD from ACL is a reliable choice for those looking to enhance the performance of their engine. This main bearing set is specifically designed for the Toyota 1RZ, 2RZ, 2TZ, and 3RZ inline 4 engines. With a focus on durability and efficiency, these bearings bring together advanced metallurgy and thoughtful engineering to meet the demands of high-performance driving.

Features

  • High-strength overlay plate with reduced thickness that improves fatigue properties, ensuring longevity even under stress.
  • Hardened steel backs on all rod bearings enhance support for the bearing lining, aiding in retention within the housing.
  • Increased crush for better bearing retention, which is crucial during high RPM situations.
  • Elimination of flash plating on the back of the bearings optimizes heat transfer and maximizes grip between the bearings and housing.
  • Enhanced eccentricity compensates for bore distortion at high RPM, promoting the formation of hydrodynamic oil films.
  • 3/4 grooved main bearings increase the load-carrying surface area and improve oil flow to the conrod bearings.
  • Tight, consistent wall tolerances help maintain precise clearances, which is essential for optimal engine performance.
  • Enlarged ID chamfers on bearing edges accommodate large fillet radii on performance crankshafts, ensuring a better fit.

Specifications

  • Designed to withstand higher RPM conditions, making it suitable for performance applications.
  • Available bearing sizes include STD, .025, and .25, allowing for customization based on your engine's requirements.

Customer Feedback

Many users have reported that the 5M8378HX-STD bearings significantly improved their engine's responsiveness and overall performance. One customer noted, "After installing these bearings, I noticed a smoother operation and better oil flow, especially at higher RPMs." Another mentioned, "They fit perfectly in my 3RZ engine and have held up well under stress during track days." Overall, these bearings have earned a reputation for reliability and performance enhancement among automotive enthusiasts.

Other Part Numbers:
ACL #acl5M8378HX-STD

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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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