If you're diving into the world of performance engines, you know that every little detail matters. That's where the ACL Race Series Engine Bearings come into play. These aren't just any bearings; they’re crafted with a unique blend of design, metallurgy, and engineering that really delivers under pressure. Whether you're pushing your 4, 6, or 8-cylinder engine to its limits, these bearings are built to handle the heat—literally.

What sets these bearings apart? For starters, the high strength overlay plate is thinner, which means it has better fatigue properties. You want your engine to perform at higher RPMs without breaking a sweat, right? The hardened steel backs on all the rod bearings provide solid support for the lining and keep them snug in the housing, which is crucial during those intense drives.

Speaking of support, the increased crush helps with bearing retention, so you can hit those high speeds without worrying about your bearings giving out. Plus, they've eliminated flash plating on the back. This isn't just a cost-cutting measure; it actually improves heat transfer and helps the bearings grip better in their housing. When you're talking about high-performance setups, every bit counts.

And let’s not forget about the increased eccentricity. This feature compensates for bore distortion at high RPMs, which helps form those all-important hydrodynamic oil films. You get 3/4 grooved main bearings that optimize the load-carrying surface area and improve oil flow to the conrod bearings—essential for keeping everything running smoothly.

These bearings come with tight, consistent wall tolerances, so you can maintain clearances that are reliable and predictable. And if you’ve got performance crankshafts, the enlarged ID chamfers on the bearing edges will accommodate those large fillet radii without a hitch.

When it comes to specs, these bearings are available in various sizes—STD, 001, 009, 010, 011, and 020. The oil clearance is standard, and they come in upper and lower half types. Made from tri-metal hardened steel backs, they’re designed to fit a range of vehicles, including:

• Chevrolet Avalanche (2007-2013)
• Chevrolet Avalanche 1500 (2002-2006)
• Chevrolet Avalanche 2500 (2002-2006)
• Chevrolet Bel Air (1950-1975 & 1981)
• Chevrolet Chevelle (1964-1974)
• Chevrolet El Camino (1975-1987)
• Chevrolet Express (1996-2020)

With a minimum standard shaft size of 2.7482 inches and a maximum of 2.7492 inches, along with tunnel sizes from 2.937 to 2.938 inches, these bearings are built to fit just right. The maximum wall at the crown is 0.0934 inches, and the overall length is 1.0433 inches. If you're serious about your engine's performance, these ACL Race Series Engine Bearings are a solid choice that won't let you down.