If you're pushing your vehicle to the limit, you know the importance of quality engine bearings. The ACL Race Series Engine Bearings are a game-changer for anyone serious about performance. These aren’t your run-of-the-mill bearings; they’re built to handle the rigors of high RPM conditions without breaking a sweat.

What sets these bearings apart? For starters, they've got a high-strength overlay plate that’s thinner than your average bearing. This design tweak significantly boosts their fatigue properties, which means they can take a beating and keep on going. Plus, all the rod bearings come with hardened steel backs. This isn’t just for show; it enhances support for the bearing lining and helps keep everything snug in its housing.

One of the standout features is the increased crush, which improves how well the bearings stay put. You won’t have to worry about them shifting around when the engine's revving high. And speaking of high revs, the elimination of flash plating on the back of the bearings is a clever move. It helps with heat transfer and ensures a solid grip between the bearings and their housing, which is crucial when you’re pushing your engine hard.

These bearings also come with increased eccentricity to tackle any bore distortion at high RPMs, which is a common issue in performance setups. This feature helps in forming hydrodynamic oil films, ensuring your engine stays lubricated even under stress. The 3/4 grooved main bearings are designed to optimize load-carrying surface area and oil flow to the conrod bearings, which is essential for keeping everything running smoothly.

Consistency is key in performance engines, and these bearings deliver with tight wall tolerances that help maintain your clearances. Plus, they’ve got enlarged ID chamfers on the edges where it counts, accommodating those larger fillet radii found on performance crankshafts.

In terms of specs, you’ve got options for sizes like STD, .025, .25, and .50, so you can find the perfect fit for your setup. The standard oil clearance and half-type design (upper and lower) make installation straightforward. They’re made from tri-metal with hardened steel backs, ensuring durability and performance. The dimensions are spot on, with a minimum standard shaft size of 2.0847 inches and a maximum of 2.0852 inches, making them compatible with a range of applications.

These bearings are a perfect fit for vehicles like the Nissan Pulsar from 1987 to 2005 and the Nissan Sentra from 1982 to 2018. If you’re running a CA18 or C20 engine, the 0.50 oversized high-performance main bearing set is a solid choice to elevate your build.