If you're diving into the world of high-performance engines, you know how crucial it is to have the right components. That's where the ACL Race Series Engine Bearings come into play. These aren't just any bearings; they’re designed with the kind of engineering and metallurgy that serious drivers demand, especially when you’re pushing those RPMs higher than ever. Whether you’re working on a 4, 6, or 8-cylinder setup, these bearings have got you covered.

What sets them apart? For starters, the high-strength overlay plate is thinner than what you might find in standard bearings, which means better fatigue resistance. You can really feel the difference when you’re revving up your engine. And let’s talk about the hardened steel backs on the rod bearings. They provide solid support for the bearing lining, making sure everything stays in place even under the toughest conditions.

One of the standout features is the increased crush that enhances bearing retention. This means you won’t have to worry as much about your bearings shifting around when the engine's really working hard. Plus, they've eliminated flash plating on the back, which helps with heat transfer. That’s crucial for keeping your engine running smoothly and efficiently.

These bearings also come with increased eccentricity to help tackle any bore distortion you might encounter at high RPMs. This little tweak assists in forming hydrodynamic oil films, which is a fancy way of saying it helps keep everything lubricated just right. The 3/4 grooved main bearings are designed to optimize the load-carrying surface area and improve oil flow to the conrod bearings, which is a game-changer for performance.

When it comes to specs, these bearings are available in sizes like STD and 025, with standard oil clearance, and they come as identical halves. The material is tri-metal with hardened steel backs, ensuring durability. For those who like the numbers, the minimum standard shaft size is 2.0455 in (51.956 mm) and the maximum is 2.0463 in (51.975 mm). The tunnel sizes range from 2.1654 in (55 mm) to 2.1659 in (53.013 mm), so you’ll want to make sure you’ve got the right fit for your setup.

These bearings fit a range of Nissan models, including the Nissan Maxima from 1981 to 2018, the Nissan Murano from 2003 to 2007 and 2009 to 2018, and the Nissan Pathfinder from 1987 to 2018. Specifically, the 6B2640H-.25 ACL Nissan VQ35DE 3.5L-V6 0.25mm oversized high-performance rod bearing set is a solid choice for anyone looking to take their engine to the next level.

In short, if you want bearings that can handle the heat and keep your engine performing at its best, the ACL Race Series is definitely worth considering. They’ve got the features and specs to back up their performance, and you’ll feel the difference on the road or the track.