If you’re serious about performance, you’ll want to check out these ACL Race Series Engine Bearings. They’re not just any bearings; they’re crafted with a unique blend of design, metallurgy, and engineering that really delivers when you push your engine to its limits. These bearings are built to handle higher RPMs, making them perfect for those who love to rev their 4, 6, or 8-cylinder engines.

One of the standout features is the high-strength overlay plate. It’s thinner than what you might find elsewhere, which means better fatigue resistance when you’re really pushing your engine. And let’s not forget about the hardened steel backs on all the rod bearings. This isn’t just for show; it enhances the support for the bearing lining and helps keep everything snug in the housing.

You’ll appreciate the increased crush on these bearings, too. It’s all about keeping them in place, especially when the heat is on. Speaking of heat, ACL has done away with flash plating on the back of the bearings. This little tweak improves heat transfer, which is crucial when you’re driving hard. Plus, it maximizes the grip between the bearings and the housing—no slipping here!

High RPMs can distort your bore, but these bearings have increased eccentricity to compensate for that. This helps in forming those all-important hydrodynamic oil films, ensuring everything runs smoothly. The 3/4 grooved main bearings are designed to optimize the load-carrying surface area and enhance oil flow to the conrod bearings. It’s all about efficiency and performance.

And let's talk tolerances. You’ll find tight, consistent wall tolerances here, which help you maintain those clearances you need for a solid build. Plus, there are enlarged ID chamfers on the bearing edges to accommodate larger fillet radii on performance crankshafts. It’s the little details that count, right?

Now, for the specs: These bearings come in a standard size (STD) with an oil clearance of +0.001” extra. They’re made from tri-metal hardened steel backs, ensuring durability and performance. The dimensions are spot on, with a minimum standard shaft size of 2.1646 inches and a maximum of 2.1654 inches. The tunnel sizes are just as precise, ranging from 2.3228 inches to 2.3236 inches. You’ll also find a maximum wall at the crown of 0.0785 inches and an overall length of 0.7874 inches.

These bearings fit a range of popular models, including the Acura Integra from 1986 to 2001, and various Honda Accords and CR-Vs from 1990 to 2020. So, if you’re looking to boost your engine’s performance, these ACL Race Series Engine Bearings are definitely worth considering.