If you're serious about performance, you know that the heart of your engine is crucial. That’s where the ACL Race Series Engine Bearings come into play. These aren't just any bearings; they’re designed for those who push their engines to the limit. With a unique blend of design, metallurgy, and engineering, these bearings are built to handle the high RPMs you crave.

One of the standout features is the high-strength overlay plate, which has a reduced thickness that actually improves fatigue properties. This means you can rev higher without worrying about wear and tear. Plus, the hardened steel backs on all rod bearings provide solid support for the bearing lining, ensuring they stay put in the housing. It’s like having a sturdy backbone for your engine.

And let’s talk about crush—these bearings come with increased crush to enhance retention. You won’t have to stress about them slipping out of place. The elimination of flash plating on the back is another smart move; it improves heat transfer and strengthens the grip between the bearings and their housing. This is crucial when you’re pushing your engine hard.

Another nifty feature is the increased eccentricity, which compensates for any bore distortion at high RPMs. This helps in forming hydrodynamic oil films, keeping everything slick and running smoothly. The 3/4 grooved main bearings are a game-changer too; they optimize the load-carrying surface area and enhance oil flow to the conrod bearings. It’s all about keeping things moving efficiently.

Consistency is key in performance, and these bearings deliver with tight wall tolerances that help maintain clearances. And if you're working with performance crankshafts, the enlarged ID chamfers on the bearing edges are designed to accommodate larger fillet radii. It’s those little details that make a big difference.

Now, for the specs: you can get these bearings in sizes like STD, .025, .25, and 0.5. They have standard oil clearance and come in identical halves. Made from tri-metal hardened steel backs, they’re tough enough for any job. The dimensions are spot-on too, with a minimum standard shaft size of 1.8891 inches and a maximum of 1.8898 inches. Plus, they fit a range of Subaru models from 1990 to 2017, including the Legacy and Outback. If you're working with a 2.5L EJ22/EJ25 engine, these .25mm oversized rod bearing sets are just what you need.

So, if you’re looking to upgrade your engine's performance, these ACL Race Series Engine Bearings might just be the upgrade you’ve been searching for. They’re built for the real world and ready to take your ride to the next level.