If you're looking to squeeze every last bit of performance out of your engine, check out these ACL Race Series Engine Bearings. They’re designed specifically for those of us who love pushing our cars to the limit—think higher RPMs and serious power. Whether you’re in a Subaru Impreza from '93 to 2018 with an EJ20, EJ22, or EJ25, these bearings are a solid upgrade for your ride.

What makes these bearings stand out?

• First off, they come with a high-strength overlay plate that’s thinner than your average bearing. This means better fatigue resistance, which is crucial when you're revving high.
• All the rod bearings have hardened steel backs. This not only supports the bearing lining but also helps keep everything snug in the housing. You don’t want your bearings shifting around when you’re pushing hard.
• The crush has been increased for better retention, so you can be confident these bearings will stay put under pressure.
• They’ve ditched the flash plating on the back. Why? To improve heat transfer and maximize grip between the bearings and the housing. Heat management is key, especially in high-performance setups.
• With increased eccentricity, these bearings can handle bore distortion at high RPMs, which helps create those all-important hydrodynamic oil films.
• The main bearings are 3/4 grooved, optimizing the load-carrying surface area and ensuring oil flows smoothly to the conrod bearings. This is where the magic happens.
• Consistent wall tolerances mean you can maintain clearances that are spot-on, which is crucial for performance.
• And if you’ve got a performance crankshaft, the enlarged ID chamfers on the bearing edges are a nice touch to accommodate those larger fillet radii.

Specs you’ll want to know:

• Sizes available: STD, 025, .25, 0.5
• Oil clearance is standard, so you know what you’re getting.
• Half type: identical halves for easy installation.
• Material: tri-metal with hardened steel backs for durability.
• Min standard shaft size: 2.0466 in / 51.984 mm
• Max standard shaft size: 2.0472 in / 52.000 mm
• Min standard tunnel size: 2.1654 in / 55.000 mm
• Max standard tunnel size: 2.1661 in / 55.020 mm
• Max wall at crown: 0.0591 in / 1.500 mm
• Max overall length: 0.6496 in / 16.50 mm

So, if you’re ready to upgrade your Subaru's performance and reliability, these ACL bearings are a smart choice. They fit snugly in the EJ20/EJ22/EJ25 engines, especially with that 52mm journal size, and the 0.25mm oversized option gives you that extra edge for high performance. Trust me, your engine will thank you.