If you're diving into the world of high-performance engines, you know that every little detail counts. That’s where these ACL Race Series Engine Bearings come into play. They’re not just your run-of-the-mill bearings; they’re built for the serious driver who pushes their engine to the limit. Whether you’re rocking a 4, 6, or 8-cylinder setup, these bearings are designed to handle the heat—literally.

What makes these bearings stand out?

• First off, they have a high-strength overlay plate that's thinner than what you usually see. This isn’t just for show; it actually improves fatigue properties, making them more resilient under high RPM conditions.
• Then there’s the hardened steel backs on the rod bearings. This little feature helps support the bearing lining better and keeps everything snug in the housing. You don’t want your bearings shifting around when you’re hitting those high speeds!
• They’ve also cranked up the crush on these bearings to ensure they stay put, which is a big deal when you’re pushing your engine hard.
• No flash plating on the backs means better heat transfer. This is crucial for keeping everything cool, and it maximizes the grip between the bearings and their housing—no slippage here!
• With increased eccentricity, these bearings compensate for any bore distortion you might see at high RPMs. That means you’ll get a solid hydrodynamic oil film forming, which is essential for smooth operation.
• And let’s not forget about the 3/4 grooved main bearings. They optimize the load-carrying surface area and ensure oil flows just right to the conrod bearings.
• Consistency is key, and these bearings come with tight wall tolerances to help maintain those important clearances.
• Finally, the enlarged ID chamfers on the edges are a nice touch, especially if you’re dealing with performance crankshafts that have a large fillet radius.

Now, let’s get into the specs:

• Sizes available: STD, 001, 009, 010, 011, 020
• Oil Clearance: Standard
• Half Type: Upper & Lower
• Material: Tri-metal with hardened steel backs
• Min Standard Shaft Size: 2.199in / 55.855mm
• Max Standard Shaft Size: 2.2in / 55.88mm
• Min Standard Tunnel Size: 2.3247in / 59.047mm
• Max Standard Tunnel Size: 2.3252in / 59.06mm
• Max Wall at Crown: 0.0619in / 1.572mm
• Max Overall Length: 0.889in / 22.58mm

These bearings are a solid fit for:

• Chevrolet Bel Air (1950-1975 & 1981)
• Chevrolet Corvette (1975-1982 & 1984-2013)
• Chevrolet Impala (1975-1985 & 1994-1996 & 2000-2020)

So, if you're looking to keep your classic Chevy running smooth and powerful, these ACL bearings are definitely worth considering. They’re built to last and handle the demands of performance driving. Trust me, your engine will thank you.