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 designed specifically for those of us who push our engines to the limit, whether it’s on the track or the trail. With a unique blend of design, metallurgy, and engineering, they deliver the kind of reliability and performance you expect when you're revving high RPMs.

These bearings are available for a wide range of popular 4, 6, and 8-cylinder applications, so you’re likely to find the perfect fit for your setup. What really sets them apart is the high-strength overlay plate. It’s thinner than what you might be used to, but that’s intentional—it improves fatigue properties and ensures these bearings can handle the heat and stress of serious driving.

Let’s talk about some of the standout features:

• The hardened steel backs on all rod bearings provide solid support for the bearing lining, which means you won’t have to worry about them slipping out of place in the housing.
• They’ve increased the crush for better retention, so these bearings stay put even when the engine is screaming.
• Gone is the flash plating on the back of the bearings; this change is all about improving heat transfer and maximizing grip between the bearings and their housing.
• With increased eccentricity, they compensate for any bore distortion at high RPMs, helping to create those all-important hydrodynamic oil films that keep everything running smoothly.
• The 3/4 grooved main bearings are a game changer, optimizing load-carrying surface area and ensuring oil flows efficiently to the conrod bearings.
• Plus, the tight wall tolerances help you maintain consistent clearances, which is crucial for performance.
• And for those of you running performance crankshafts, the enlarged ID chamfers on the bearing edges accommodate large fillet radii, making installation a breeze.

As for the nitty-gritty specs, these bearings come in standard sizes of STD, 001, 010, and 020, with standard oil clearance and identical halves. Made from tri-metal with hardened steel backs, they fit shaft sizes from 2.1255 inches to 2.1260 inches, and tunnel sizes from 2.2710 inches to 2.2715 inches. The maximum wall thickness at the crown is 0.0723 inches, and they measure about 1.0047 inches in overall length.

So if you’re looking to take your engine's performance to the next level, the 5M2152H-STD ACL Ford 4 1500-1600cc OHV Twin Cam Standard Size High Performance Main Bearing Set is worth considering. These bearings are built for those who demand the best, and trust me, they won’t disappoint.