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ACL Mazda 4 1991CC FS +.25 Oversized Main Bearing Set 93-02, Trimetal Engine Bearings - 5M8302A-.25

ACL 5M8302A-.25 Oversized Main Bearing Set

The 5M8302A-.25 by ACL is engineered for performance-driven applications, specifically designed to meet the demands of high RPM conditions. This main bearing set is a crucial component for those looking to enhance their engine's reliability and efficiency. With a focus on metallurgy and precision engineering, these bearings are built to withstand the rigors of racing and spirited driving.

Key Features

  • High Strength Overlay Plate: Features a reduced thickness that improves fatigue resistance, allowing for better performance under high-stress conditions.
  • Hardened Steel Backs: All rod bearings come with hardened steel backs to enhance support for the bearing lining and ensure secure retention within the housing.
  • Increased Crush: Designed with increased crush to enhance bearing retention, ensuring stability during operation.
  • Improved Heat Transfer: The elimination of flash plating on the back of the bearings enhances heat dissipation, maximizing the grip between the bearings and their housing.
  • Enhanced Eccentricity: Increased eccentricity compensates for bore distortion at high RPMs, facilitating the formation of hydrodynamic oil films for optimal lubrication.
  • 3/4 Grooved Design: Main bearings are equipped with a 3/4 grooved configuration to optimize load-carrying surface area and improve oil flow to the connecting rod bearings.
  • Tight Wall Tolerances: Consistent wall tolerances help maintain precise clearances, critical for performance applications.
  • Enlarged ID Chamfers: Bearing edges are designed with enlarged ID chamfers to accommodate larger fillet radii found on performance crankshafts.

Specifications

  • Oversized by .25 mm
  • Durable construction with excellent abrasion, load, impact, and heat resistance.

Fitment

This main bearing set is confirmed to fit the Mazda B-Series 1998-2011. Ensure compatibility with your specific engine configuration for optimal performance.

Other Part Numbers:
ACL #acl5M8302A-.25

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Vehicle
1998-2011
 Mazda B-Series

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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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