If you're looking to get serious about your engine's performance, these ACL Race Series Engine Bearings are worth your attention. I've had my fair share of experiences with various bearings, but there's something about this Trimetal design that just feels right. It's not just about slapping on some metal and calling it a day; this stuff is engineered to handle the kind of RPMs that would make lesser bearings sweat.

What I really appreciate is the high strength overlay plate. It's thinner than what you might find in typical bearings, but that’s a good thing—it really amps up the fatigue properties. You want your engine to keep its cool under pressure, and these bearings help with that. Plus, the hardened steel backs on all the rod bearings provide solid support for the lining and ensure they stay put in the housing. You don’t want to be dealing with a loose bearing when you’re pushing your ride to the limit.

Another detail that stands out is the increased crush. This isn’t just a buzzword; it translates to better bearing retention, which is critical when you’re talking about high-performance applications. And let’s not forget the elimination of flash plating on the back. This little tweak improves heat transfer and enhances the grip between the bearings and their housing—essential for keeping everything running smoothly at high speeds.

Speaking of high RPMs, the increased eccentricity is a game-changer. It compensates for bore distortion, helping to form those all-important hydrodynamic oil films. And with the 3/4 grooved main bearings, you get optimized load-carrying surface area and improved oil flow to the conrod bearings. That’s crucial for maintaining performance, especially when you’re pushing your engine hard.

These bearings also come with tight and consistent wall tolerances, making it easier to maintain those clearances you need for peak performance. And if you’re working with performance crankshafts, the enlarged ID chamfers on the bearing edges accommodate larger fillet radii, which is a nice touch.

As for the specs, you’re looking at sizes ranging from STD to .025 and .25, with standard oil clearance and identical halves. The material? Tri-metal hardened steel backs that are built to last. Just to give you a sense of fitment, these bearings are compatible with the Mitsubishi Galant from 1994 to 2012, as well as the 4G63/4G64 7 Bolt 2nd Gen DSM and EVO I-IX, with a .50mm oversized rod bearing set. The dimensions are spot on, with a minimum standard shaft size of 1.7709 inches and a maximum of 1.7715 inches.

In short, if you’re serious about squeezing every bit of performance out of your engine, these ACL Race Series Engine Bearings are a solid investment. They’re built for the long haul and designed to keep your engine running like a champ.