When it comes to pushing your engine’s limits, you want bearings that can keep up. That’s where the ACL Race Series Engine Bearings come into play. These aren’t just any bearings; they’re a solid blend of design, metallurgy, and engineering that really delivers on performance. If you're running a 4, 6, or 8-cylinder engine, you'll find these bearings are built to handle higher RPMs without breaking a sweat.

One of the standout features is the high-strength overlay plate. It’s thinner than what you might expect, but that’s intentional. This design boosts fatigue resistance, so you can rev your engine without worrying about wear and tear. Plus, the hardened steel backs on all the rod bearings provide extra support for the bearing lining, ensuring they stay put in their housing, even under pressure.

Speaking of pressure, these bearings come with increased crush, which means they hold onto their position better. You won’t have to deal with the hassle of them shifting around. They’ve also eliminated flash plating on the backs, which is a game-changer for heat transfer. This means better thermal management, allowing for optimal grip between the bearings and their housing.

Now, if you’re pushing your engine to the limit, you’ll appreciate the increased eccentricity. This feature compensates for bore distortion at high RPMs, helping to form those all-important hydrodynamic oil films that keep everything running smoothly. And let’s not forget about the 3/4 grooved main bearings; they optimize the load-carrying surface area and improve oil flow to the conrod bearings, which is essential for high-performance builds.

With tight and consistent wall tolerances, you can maintain precise clearances, which is crucial for any serious build. The enlarged ID chamfers on the bearing edges are another thoughtful touch, accommodating larger fillet radii on performance crankshafts without a hitch.

In terms of specs, these bearings come in a standard size with an oil clearance of +0.001 inches extra, making them a perfect fit for your needs. The material is tri-metal with hardened steel backs, ensuring durability. They fit standard shaft sizes ranging from 1.8898 inches to 1.8905 inches, and tunnel sizes from 2.0310 inches to 2.0315 inches. The max wall at the crown is 0.0691 inches, and the overall length is 0.807 inches.

So, if you’re working on a Renault Clio V6 RS from 2001 to 2005, these ACL bearings (part number 4B7820HX-STD) are your go-to choice for a high-performance rod bearing set. Trust me; they’ll help you get the most out of your engine.