If you're looking to boost your engine's performance, these ACL Race Series Engine Bearings are worth a serious look. They’re not just any bearings; they’re crafted with a unique blend of design, metallurgy, and engineering that’s geared for the serious driver. Whether you’re pushing your Subaru to its limits on the track or just want peace of mind on the street, these bearings can handle the heat—literally.

What sets these apart? For starters, the high-strength overlay plate is thinner, which means it can take on higher RPMs without breaking a sweat. The hardened steel backs on all rod bearings give you that extra support, ensuring the lining stays in place, even under the most demanding conditions. And let’s talk about crush—these bearings have increased crush for better retention, so you know they’re not going anywhere.

Heat management is crucial in performance applications, and these bearings are designed with that in mind. The elimination of flash plating on the back helps with heat transfer, keeping everything cool and maximizing grip between the bearings and housing. Plus, the increased eccentricity is a game-changer—it compensates for bore distortion at high RPMs, which is essential for forming those hydrodynamic oil films that keep everything running smoothly.

And if you’re worried about oil flow, the 3/4 grooved main bearings are here to optimize load carrying surface area and ensure your conrod bearings get all the oil they need. Consistency is key, and these bearings come with tight wall tolerances to maintain those clearances you want. They even have enlarged ID chamfers to fit those larger fillet radii on performance crankshafts.

Specifications:

• Sizes available: STD, .025, .25, 0.5
• Oil Clearance: Standard
• Half Type: Identical Halves
• Material: Tri-metal with Hardened Steel Backs
• Min Standard Shaft Size: 2.3616 in / 59.984 mm
• Max Standard Shaft Size: 2.3622 in / 60.000 mm
• Min Standard Tunnel Size: 2.5194 in / 64.000 mm
• Max Standard Tunnel Size: 2.5205 in / 64.020 mm
• Max Wall at Crown: 0.0789 in / 2.005 mm
• Max Overall Length: 0.7480 in / 19.00 mm

These bearings fit:

• Subaru Forester 1998-2017
• Subaru Impreza 1993-2017
• Subaru Legacy 1990-2017
• Subaru Outback 1995-2017

For those running the Subaru EJ20/EJ22/EJ25, you’ll want to grab the 5M8297H-.025, which is a 0.025mm oversized high-performance main bearing designed specifically for thrust in the #3 position. Trust me, these bearings are a solid investment in your engine's longevity and performance.