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  See all Engine products
ACL Toyota 4 1587cc .25mm Oversized Rod Bearing Set 1987-1992 Tri-metal Engine Bearings - 4B1780A-.25
ACL Toyota 4 1587cc .25mm Oversized Rod Bearing Set 1987-1992 Tri-metal Engine Bearings - 4B1780A-.25 - Image 2 ACL Toyota 4 1587cc .25mm Oversized Rod Bearing Set 1987-1992 Tri-metal Engine Bearings - 4B1780A-.25 - Image 2

ACL 4B1780A-.25 Engine Bearing

The ACL 4B1780A-.25 is a meticulously engineered rod bearing designed for those who demand reliability and performance in their engine builds. With a focus on durability, this bearing is crafted from a unique tri-metal composition that enhances its ability to withstand the rigors of high RPM conditions. Whether you're on the track or the street, this bearing is built to meet the expectations of serious drivers.

Features

  • High strength overlay plate with reduced thickness for improved fatigue properties.
  • Hardened steel backs on all rod bearings to enhance support and retention within the housing.
  • Increased crush for better bearing retention, ensuring stability during operation.
  • Elimination of flash plating on the back, which aids in heat transfer and maximizes grip.
  • Increased eccentricity to compensate for bore distortion at high RPMs and assist in forming hydrodynamic oil films.
  • 3/4 grooved design optimizes load carrying surface area and oil flow to conrod bearings.
  • Tight, consistent wall tolerances help maintain precise clearances.
  • Enlarged ID chamfers on edges where needed to accommodate large fillet radii on performance crankshafts.

Specifications

  • Size: .25 mm oversized
  • Oil Clearance: Standard
  • Half Type: Identical Halves
  • Material: Tri-metal
  • Min Std Shaft Size: 1.6529 in / 41.985 mm
  • Max Std Shaft Size: 1.6535 in / 42 mm
  • Min Std Tunnel Size: 1.7717 in / 45 mm
  • Max Std Tunnel Size: 1.7726 in / 45.024 mm
  • Max Wall at Crown: 0.0585 in / 1.487 mm
  • Max Overall Length: 0.6732 in / 17.1 mm

Customer Feedback

"I installed the ACL 4B1780A-.25 bearings in my Toyota engine, and the difference was noticeable right away. The engine runs smoother, and I have more confidence pushing it to higher RPMs. Highly recommend for anyone looking to upgrade!" - John D.

"These bearings fit perfectly and the quality is evident. I've used other brands in the past, but ACL seems to offer a better balance of performance and durability." - Sarah L.

Other Part Numbers:
ACL #acl4B1780A-.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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