If you're diving into the world of high-performance engines, you know that the right bearings can make all the difference. That's where the ACL Race Series Engine Bearings come into play. These aren’t just any bearings; they’re crafted from a unique blend of design, metallurgy, and engineering that really stands up to the demands of higher RPM conditions. Whether you're working on a 4, 6, or 8-cylinder setup, these bearings have got you covered.

One of the standout features is the high-strength overlay plate. It's thinner than what you might find in standard bearings, and that’s intentional. This design choice enhances fatigue properties, which is a big deal when you're pushing your engine to its limits. Plus, all rod bearings come with hardened steel backs. This not only supports the bearing lining but also helps keep everything locked in place within the housing.

Speaking of staying put, the increased crush on these bearings ensures they hold their ground even under the most demanding conditions. Gone are the days of worrying about flash plating on the back; these bearings are designed to improve heat transfer and maximize grip between the bearing and its housing. That means better performance and less heat-related wear.

Now, if you're revving up those RPMs, you’ll appreciate the increased eccentricity. This feature compensates for any bore distortion and helps create those all-important hydrodynamic oil films. And let’s not forget the 3/4 grooved main bearings. They optimize bearing load carrying surface area and enhance oil flow to the conrod bearings, which is critical for keeping everything lubricated and running smoothly.

Consistency is key in high-performance applications, and these bearings deliver with tight wall tolerances that help maintain clearances. Plus, you’ll find enlarged ID chamfers where necessary to accommodate larger fillet radii on performance crankshafts—because every little detail matters when you’re building a beast.

As for the specs, these bearings come in sizes STD and 010, with standard oil clearance. They’re available in upper and lower half types and are made from tri-metal with hardened steel backs. You’ll want to ensure your shaft size falls between 2.9994 inches and 3.0002 inches for a perfect fit, and the tunnel sizes range from 3.1922 inches to 3.193 inches. The max wall at the crown is 0.0959 inches, and they measure up to 0.95 inches in overall length.

These bearings are a solid fit for a variety of Ford models, including the Explorer from 1995 to 2016, the Mustang from 1964 to 1973 and 1979 to 2022, and the Thunderbird from 1983 to 1997 and 2003 to 2005. If you’re working on a Ford V8 370/429/460, the .10mm oversized trimetal main bearing set is definitely worth considering.

In short, if you’re serious about performance, these ACL Race Series Engine Bearings are a great investment to keep your engine running strong.