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  See more parts for Mazda 323
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ACL Mazda B5/B6/BP 1498-1597cc +0.25 Oversized Main Bearing Set 81-98 - 5M8353A-.25
ACL Mazda B5/B6/BP 1498-1597cc +0.25 Oversized Main Bearing Set 81-98 - 5M8353A-.25 - Image 2 ACL Mazda B5/B6/BP 1498-1597cc +0.25 Oversized Main Bearing Set 81-98 - 5M8353A-.25 - Image 2

ACL Race Series Engine Bearings 5M8353A-.25: Performance Redefined

For those who live and breathe automotive performance, the ACL Race Series Engine Bearings 5M8353A-.25 are engineered to meet your high RPM demands while ensuring durability and reliability. Designed specifically for the Mazda 323 (1986-2003) and Mazda MX-3 (1993-1998), these trimetal bearings provide the perfect blend of strength and functionality for your engine build.

Key Features

  • High-strength overlay plate with reduced thickness enhances fatigue resistance, ensuring longevity under extreme conditions.
  • Hardened steel backs on all rod bearings bolster support for the bearing lining, improving retention in the housing.
  • Increased crush enhances bearing retention, crucial for maintaining stability during high-performance driving.
  • Eliminates flash plating on the back to improve heat transfer, maximizing grip between the bearings and housing.
  • Increased eccentricity helps compensate for bore distortion at high RPM, facilitating the formation of hydrodynamic oil films.
  • 3/4 grooved main bearings optimize load-carrying surface area and oil flow, ensuring your conrod bearings stay lubricated.
  • Tight, consistent wall tolerances help maintain precise clearances, critical for performance engines.
  • Enlarged ID chamfers on bearing edges accommodate large fillet radii on performance crankshafts, enhancing fitment.

Technical Specifications

  • Size Options: STD, .025, .25, .50
  • Oil Clearance: Standard
  • Half Type: Upper & Lower
  • Material Composition: Aluminum, Tin, and Silicon
  • Min Standard Shaft Size: 1.9661in / 49.938 mm
  • Max Standard Shaft Size: 1.9668in / 49.956 mm
  • Min Standard Tunnel Size: 2.1259in / 53.998 mm
  • Max Standard Tunnel Size: 2.1267in / 54.018 mm
  • Max Wall at Crown: 0.0793in / 2.013 mm
  • Max Overall Length: 0.6941in / 17.63 mm

Customer Insights

Owners of the Mazda 323 and MX-3 have reported significant improvements in engine response and reliability after installing these bearings. One Mazda 323 owner noted, “After swapping to the ACL Race bearings, my engine feels more responsive at high RPMs, and I haven’t had any issues with oil flow during spirited driving.”

Whether you're building a street beast or prepping for the track, the ACL Race Series Engine Bearings 5M8353A-.25 are a solid choice for Mazda enthusiasts looking to enhance their engine's performance and longevity.

Other Part Numbers:
ACL #acl5M8353A-.25

Proposition 65

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

Vehicle
1986-2003
 Mazda 323
1993-1998
 Mazda MX-3

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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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