If you're looking to push your engine to the limits, you need something that can keep up. That’s where ACL Race Series Engine Bearings come in. These aren’t just any bearings; they’re crafted with a unique blend of design, metallurgy, and engineering that really makes a difference when the RPMs start to climb. Whether you’re working with a 4, 6, or 8-cylinder setup, these bearings are built to handle the heat and pressure of high-performance driving.

One of the standout features is the high-strength overlay plate. It’s got a reduced thickness that actually improves fatigue properties, which means these bearings can take a beating without giving up. The hardened steel backs on the rod bearings provide extra support for the lining, making sure everything stays put in the housing. You want your bearings to stay where they belong, right? Well, the increased crush helps with that, ensuring they don’t budge under stress.

Now, let’s talk heat. The elimination of flash plating on the back of these bearings enhances heat transfer, which is crucial when you’re pushing your engine hard. Plus, it maximizes the grip between the bearings and their housing, so you can count on them when it matters most. The increased eccentricity is another smart touch, compensating for bore distortion at high RPMs and supporting the formation of those all-important hydrodynamic oil films.

And for those of you who love the nitty-gritty details, the 3/4 grooved main bearings optimize load carrying and oil flow to the conrod bearings, ensuring everything runs smoothly. Tight, consistent wall tolerances help maintain precise clearances, which is essential for performance. You’ll also find enlarged ID chamfers on the bearing edges to accommodate larger fillet radii on performance crankshafts—little things that make a big difference when you’re in the thick of it.

When it comes to specs, these bearings come in standard sizes (STD, .025, .25, .50) and offer standard oil clearance with identical halves. They’re made from tri-metal hardened steel backs, designed to fit snugly with a minimum standard shaft size of 2.1636 inches and a maximum of 2.1646 inches. The tunnel sizes range from 2.3206 to 2.3216 inches, and the max wall at the crown is 0.0780 inches. Overall, the length is a compact 0.752 inches, making them a versatile choice for many setups.

These bearings are a perfect fit for the Nissan Pulsar from 1987 to 2005, specifically the SR20DE/DET GTiR models. With five oil holes in the upper bearing, you can be confident they’ll deliver the performance you need on the track or the street. If you’re serious about your engine, these bearings are a solid investment that’ll help you get the most out of your ride.