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  See more parts for Subaru Legacy
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ACL Engine Bearings 5M8309A-.25 Main Bearing Set for Subaru EJ20/EJ22/EJ25 0.25mm Oversized - 5M8309A-.25
ACL Engine Bearings 5M8309A-.25 Main Bearing Set for Subaru EJ20/EJ22/EJ25 0.25mm Oversized - 5M8309A-.25 - Image 2 ACL Engine Bearings 5M8309A-.25 Main Bearing Set for Subaru EJ20/EJ22/EJ25 0.25mm Oversized - 5M8309A-.25 - Image 2

ACL 5M8309A-.25 Race Series Engine Bearings for Subaru Legacy

If you’re a proud owner of a Subaru Legacy (1990-2017), you know that performance is key—especially when it comes to your engine's health. The ACL 5M8309A-.25 Race Series Engine Bearings are designed specifically for high-performance applications, making them an essential upgrade for drivers looking to push their engines to the limit.

Why Choose ACL Race Series Engine Bearings?

The unique combination of advanced design, top-notch metallurgy, and rigorous engineering ensures that these Trimetal engine bearings can handle the demands of higher RPM conditions. Whether you're hitting the track or just want a more reliable daily driver, these bearings are built to perform.

Key Features:

  • High-strength overlay plate with reduced thickness enhances fatigue properties, ensuring durability under stress.
  • Hardened steel backs on all rod bearings improve support for the bearing lining and enhance retention in the housing.
  • Increased crush improves bearing retention, preventing any unwanted movement during operation.
  • Flash plating has been eliminated on the back of the bearings to optimize heat transfer and maximize grip in the housing.
  • Designed with increased eccentricity to counteract bore distortion at high RPMs, promoting effective hydrodynamic oil films.
  • 3/4 grooved main bearings optimize load carrying surface area and oil flow to the connecting rod bearings.
  • Tight, consistent wall tolerances help maintain precise clearances for better performance.
  • Enlarged ID chamfers accommodate large fillet radii on performance crankshafts, ensuring a perfect fit.

Technical Specifications:

  • Size: STD, .025, .25
  • Oil Clearance: Standard
  • Half Type: Identical Halves
  • Material: Tri-metal Hardened Steel Backs
  • Min Standard Shaft Size: 2.3616 in / 59.984 mm
  • Max Standard Shaft Size: 2.3622 in / 60 mm
  • Min Standard Tunnel Size: 2.5197 in / 64 mm
  • Max Standard Tunnel Size: 2.5205 in / 64.02 mm
  • Max Wall at Crown: 0.0789 in / 2.005 mm
  • Max Overall Length: 0.748 in / 19 mm

Customer Feedback:

Subaru Legacy owners have reported significant improvements in engine performance after installing the ACL 5M8309A-.25 bearings. One owner noted, “After upgrading to these bearings, my 2015 Legacy feels more responsive at higher RPMs, and I haven’t noticed any oil pressure drops even during spirited driving.”

Upgrade your Subaru Legacy’s engine with the ACL 5M8309A-.25 Race Series Engine Bearings and experience the difference in performance and reliability. These bearings are a proven choice for anyone serious about their vehicle's performance.

Other Part Numbers:
ACL #acl5M8309A-.25

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Vehicle
1990-2017
 Subaru Legacy

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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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