If you're diving into the world of high-performance engines, you know that every little detail counts. That's where the ACL Race Series Engine Bearings come into play. These aren't just any bearings; they’re crafted from a unique blend of design, metallurgy, and engineering that really delivers on the promise of performance. Whether you're running a 4, 6, or 8-cylinder setup, these bearings are designed to handle the heat and stress of higher RPMs without breaking a sweat.

What really stands out about these bearings is the high-strength overlay plate. It's thinner than what you might find elsewhere, which actually improves fatigue properties—pretty crucial when you're pushing your engine to its limits. The hardened steel backs on all the rod bearings offer solid support for the lining, which helps keep everything locked in place as you rev up. And let’s be real, nobody wants their bearings shifting around when they're at full throttle.

Another cool feature is the increased crush that enhances bearing retention. This means they stay put, even under intense conditions. They’ve also done away with flash plating on the back, which is a game-changer for heat transfer. This design choice maximizes grip between the bearings and their housing, ensuring everything stays cool and efficient. Plus, with increased eccentricity, these bearings can handle bore distortion at high RPMs while helping to form those all-important hydrodynamic oil films.

The 3/4 grooved main bearings are another thoughtful touch. They optimize the load-carrying surface area and oil flow to the conrod bearings, so your engine runs smoother and more reliably. And let's not forget about the tight, consistent wall tolerances—this helps maintain clearances that are crucial for performance. They’ve even enlarged the ID chamfers on the edges where needed, to fit those beefy fillet radii on performance crankshafts. It’s all in the details, right?

Now, if specs are your thing, here’s what you need to know:

• Size: STD
• Oil Clearance: +0.001" Extra
• Half Type: Identical Halves
• Material: Tri-metal Hardened Steel Backs
• Min Std Shaft Size: 1.7713in / 44.992 mm
• Max Std Shaft Size: 1.7717in / 45.000 mm
• Min Std Tunnel Size: 1.8898in / 48.000 mm
• Max Std Tunnel Size: 1.8907in / 48.024 mm
• Max Wall at Crown: 0.0582in / 1.479 mm
• Max Overall Length: 0.6299in / 16.00 mm

These bearings are a perfect fit for a range of vehicles, including:

• Lotus Elise (1996-2018)
• Lotus Exige (2004-2018)
• Toyota Celica (1982-2005)

So if you’re looking to squeeze out every bit of performance from your engine, these ACL Race Series Engine Bearings are definitely worth considering. They’re built for the real world, where every rev matters.