If you’re looking to push your engine to the limit, you’ll want to check out these ACL Race Series Engine Bearings. They’re not just any bearings; they’re built for the kind of high-performance demands that come with revving your engine at higher RPMs. Whether you’re working with a 4, 6, or 8-cylinder setup, these bearings are designed to keep up with your need for speed.

What sets these bearings apart? For starters, the overlay plate is made with high strength but has a reduced thickness. This means it can handle the stress better without compromising on durability. The hardened steel backs on all rod bearings provide solid support for the lining, making sure everything stays put in the housing, even when the going gets tough.

You’ll also appreciate the increased crush feature, which improves bearing retention. That’s crucial when you’re pushing the limits. And forget about flash plating on the back of the bearings; it’s been eliminated to enhance heat transfer. This little detail helps maximize the grip between the bearings and their housing, which is essential for optimal performance.

When you rev high, bore distortion can be a real issue, but these bearings have increased eccentricity to help combat that. This feature also aids in forming hydrodynamic oil films, which are vital for keeping everything lubricated and running smoothly at those high RPMs. Plus, the 3/4 grooved main bearings optimize the load-carrying surface area and oil flow to the conrod bearings, ensuring everything stays well-lubed under pressure.

Consistency is key in performance, and these bearings deliver just that with tight wall tolerances to maintain clearances. And if you’re working with performance crankshafts, you’ll be glad to know the edges have enlarged ID chamfers to accommodate larger fillet radii.

Now, let’s get into the nitty-gritty specs. You can find these bearings in sizes STD, .025, .25, and .50, with standard oil clearance. They come in half types—upper and lower—and feature tri-metal hardened steel backs. The minimum standard shaft size is 1.9280 inches (48.971 mm), while the maximum is 1.9286 inches (48.987 mm). For tunnel sizes, you’re looking at a minimum of 2.0472 inches (52.000 mm) and a maximum of 2.0477 inches (52.012 mm). The max wall at the crown is 0.0591 inches (1.500 mm), and the overall length tops out at 0.760 inches (19.30 mm).

In short, if you’re serious about your engine performance, these 4B2322H-.50 ACL Holden/Opel Race Series 0.50mm Oversized Con Rod Bearings are worth a closer look. They’re engineered to handle the heat and stress of high RPMs while keeping everything running smoothly. Trust me, your engine will thank you.