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ACL High Performance Main Bearing Set 5M1172H-STD for Nissan L16E/L18E 68-74 1595cc/1770cc - 5M1172H-STD

If you're looking to push your engine to its limits, you’ll want to check out these ACL Race Series Engine Bearings. These aren’t just any bearings; they’re specifically designed to handle the demands of high RPM driving. Whether you're building a street machine or a track-ready beast, these bearings are a solid choice for your 4-cylinder Nissan L16E or L18E engines, which range from 1595cc to 1770cc. They fit perfectly in models from 1968 to 1974.

What makes these bearings special?

  • First off, the high-strength overlay plate is thinner than usual, which means it can take a beating without giving up. This reduces fatigue, so you can rev higher without worrying about catastrophic failure.
  • All the rod bearings come with hardened steel backs. This adds support to the bearing lining and keeps everything snug in the housing—no more worrying about bearings shifting under pressure.
  • They've cranked up the crush for better retention, so these bearings stay put even when the engine is screaming.
  • Forget about flash plating on the back; this design improves heat transfer and maximizes grip between the bearings and the housing. That means better performance and longevity.
  • With increased eccentricity, these bearings can handle bore distortion at high RPMs, helping to form those all-important hydrodynamic oil films.
  • The 3/4 grooved main bearings optimize the load-carrying surface area and oil flow to the conrod bearings, ensuring everything stays lubricated when you really need it.
  • Tight wall tolerances help maintain consistent clearances, which is crucial for performance engines.
  • And if you’re using a performance crankshaft, the enlarged ID chamfers accommodate larger fillet radii, giving you a smoother operation.

In short, if you want reliability under high RPM conditions, these ACL Race Series bearings are built to deliver. They’re the real deal for anyone serious about squeezing every bit of performance out of their engine.

Size: STD

Part Number: 5M1172H-STD

Other Part Numbers:
ACL #acl5M1172H-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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