If you're diving into the world of high-performance engines, you know that every component counts. That's where the ACL Race Series Engine Bearings come into play. These aren't just any bearings; they’re crafted through a unique blend of design, metallurgy, and engineering to handle the demands of high RPM driving. Trust me, if you’re pushing your engine to its limits, you want these bearings in your corner.

What really sets these bearings apart is their high-strength overlay plate. It's thinner than most, which means better fatigue resistance when you're really pushing your engine. Plus, the hardened steel backs on all rod bearings provide solid support for the lining, ensuring they stay put in the housing, even under intense conditions. You won't have to worry about them slipping out when you hit the gas.

They’ve also cranked up the crush to improve bearing retention, which is crucial when you're dealing with the kind of forces that come with racing. And forget about flash plating on the back of the bearings; that’s been eliminated to enhance heat transfer. This means better performance and a tighter grip between the bearings and their housing. You’ll appreciate that when you’re in the heat of competition.

These bearings come with increased eccentricity to deal with bore distortion at high RPMs, helping to create those all-important hydrodynamic oil films. The 3/4 grooved main bearings are designed to optimize load-carrying surface area and oil flow to the conrod bearings, which is a game-changer for engine efficiency.

And let’s talk about tolerances. The tight, consistent wall tolerances help maintain clearances, so you get reliable performance every time you fire up your engine. Plus, the enlarged ID chamfers on the edges accommodate larger fillet radii on performance crankshafts, making installation a breeze.

For those interested in the nitty-gritty, here are some specs to chew on:

• Size: STD
• Oil Clearance: +0.001" Extra
• Half Type: Identical Halves
• Material: Tri-metal Hardened Steel Backs
• Min Std Shaft Size: 1.888 in / 47.956 mm
• Max Std Shaft Size: 1.8887 in / 47.98 mm
• Min Std Tunnel Size: 2.0079 in / 51.000 mm
• Max Std Tunnel Size: 2.0084 in / 51.013 mm
• Max Wall at Crown: 0.0587 in / 1.490 mm
• Max Overall Length: 0.673 in / 17.10 mm

So if you're working on a Nissan SR20DE/DET (2.0L) and need a standard size high-performance rod bearing set with that extra oil clearance, these ACL bearings are a solid choice. They’re built for the real world, and they deliver the durability and performance you need when it matters most.