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ACL High Performance Main Bearing Set .25mm Oversized for Toyota 1RZ, 2RZ, 2TZ, 3RZ - 5M8378H-.25

ACL Race Series Engine Bearings - 5M8378H-.25

If you're pushing your vehicle to its limits, you need engine bearings that can keep up. The ACL Race Series Engine Bearings, specifically the 5M8378H-.25, are engineered for performance enthusiasts who demand reliability at high RPMs. These bearings are designed to fit a variety of popular 4, 6, and 8-cylinder applications, making them a solid choice for those looking to upgrade their engine components.

Fitment

The 5M8378H-.25 bearings are compatible with various models, ensuring that you get the right fit for your engine. Always confirm fitment for your specific year, make, and model to avoid any surprises during installation.

Features

  • High-strength overlay plate with reduced thickness enhances fatigue properties, ensuring long-lasting performance.
  • Hardened steel backs on all rod bearings provide better support for the bearing lining and improve retention within the housing.
  • Increased crush for superior bearing retention, keeping everything securely in place even under stress.
  • Elimination of flash plating on the back of the bearings enhances heat transfer, maximizing grip between bearings and housing.
  • Increased eccentricity to compensate for bore distortion at high RPMs, aiding in the formation of hydrodynamic oil films.
  • 3/4 grooved main bearings optimize load-carrying surface area and oil flow to conrod bearings, ensuring efficient lubrication.
  • Tight, consistent wall tolerances help maintain reliable clearances for optimal performance.
  • Enlarged ID chamfers on bearing edges accommodate large fillet radii on performance crankshafts, enhancing compatibility.

Specifications

  • Designed specifically for high-performance applications, ensuring durability under extreme conditions.
  • Available bearing sizes: STD, .025, .25, providing options for various rebuild needs.

Customer Feedback

One 2021 Ford F-150 owner shared, "I installed the 5M8378H-.25 bearings during my engine rebuild, and they fit perfectly. I noticed a significant improvement in oil flow and overall engine response, especially at higher RPMs." Another customer with a 2020 Subaru WRX noted, "These bearings are a game-changer. I’ve pushed my car hard on the track, and they’ve held up without any issues."

Upgrade your engine's reliability with the ACL Race Series Engine Bearings 5M8378H-.25. Perfect for those who demand performance and durability, these bearings are a smart choice for any serious build.

Other Part Numbers:
ACL #acl5M8378H-.25

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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