If you're diving into the world of high-performance engines, you know that every little detail matters. That's where these ACL Race Series Engine Bearings come into play. They’re crafted with a unique blend of design, metallurgy, and engineering that really gets what drivers are after when pushing their rides to the limit. Built to handle those higher RPMs, these bearings are perfect for a range of popular 4, 6, and 8-cylinder setups.

Let’s break down what makes these bearings stand out:

• First off, the high-strength overlay plate is thinner, which means better fatigue resistance. You want these bearings to take a beating, and they will.
• Then there’s the hardened steel backs on all rod bearings. This isn’t just for show; it helps support the bearing lining and keeps everything snug in its housing.
• They've cranked up the crush for better retention, so you won’t have to worry about them shifting around when the engine's screaming.
• Gone is the flash plating on the back of the bearings. This change boosts heat transfer and maximizes the grip between the bearings and their housing. Trust me, you want that heat managed.
• With increased eccentricity, these bearings compensate for bore distortion at high RPMs, helping to form those all-important hydrodynamic oil films.
• The 3/4 grooved main bearings are a game changer—they optimize the load-carrying surface area and improve oil flow to the conrod bearings, which is crucial for performance.
• They maintain tight wall tolerances, so you can keep consistent clearances, which is key in any performance setup.
• Plus, they feature enlarged ID chamfers on the edges where needed, accommodating the larger fillet radius on performance crankshafts. This means you can push your engine harder without worrying about fitment issues.

Now for the nitty-gritty specs:

• Sizes Available: STD, .025, .25
• Oil Clearance: Standard
• Half Type: Identical Halves
• Material: Tri-metal Hardened Steel Backs
• Min Std Shaft Size: 2.0465 in / 51.981 mm
• Max Std Shaft Size: 2.0472 in / 52 mm
• Min Std Tunnel Size: 2.1663 in / 55.024 mm
• Max Std Tunnel Size: 2.167 in / 55.042 mm
• Max Wall at Crown: 0.0593 in / 1.506 mm
• Max Overall Length: 0.7598 in / 19.3 mm

These bearings are a solid fit for:

• Lexus GS300 (1993-2006)
• Lexus SC300 (1992-2000)
• Toyota Supra (1986-2002)

So if you're looking to get serious about your engine build, these ACL bearings are a solid choice. They’ve got the durability and design to handle the heat, so you can focus on the road ahead.