If you're serious about performance, you know that engine bearings are crucial for keeping your engine running smoothly, especially when you're pushing it to the limit. That's where these ACL Race Series Engine Bearings come into play. They're not just any bearings; they’re designed for those high RPM situations that can really test your engine's limits. Whether you’ve got a 4, 6, or 8-cylinder setup, these bearings are built to handle the heat and pressure.

What makes them stand out?

• First off, the overlay plate is high strength but thinner, which means better fatigue resistance. This is a big deal when you’re revving high.
• All the rod bearings feature hardened steel backs. This not only supports the bearing lining better but also helps keep everything snug in the housing.
• They’ve got increased crush for improved retention, so you don’t have to worry about them shifting when the engine gets hot.
• One cool feature is the removal of flash plating on the back of the bearings. This helps with heat transfer and ensures a solid grip in the housing.
• With increased eccentricity, these bearings can handle bore distortion at high RPMs, which is essential for forming those hydrodynamic oil films that keep things lubricated.
• The 3/4 grooved main bearings optimize the load-carrying surface area and oil flow to the conrod bearings, ensuring everything stays well-lubed.
• Plus, they maintain tight wall tolerances, so you can keep your clearances consistent—no surprises there.
• And if you’ve got a performance crankshaft, the enlarged ID chamfers on the edges accommodate larger fillet radii, making installation a breeze.

Here are the specs you should know:

• Sizes available: STD, 001, 010, 020
• Oil clearance: + Standard
• Half type: Upper & Lower
• Material: Tri-metal with hardened steel backs
• Min standard shaft size: 2.5588 in / 64.993 mm
• Max standard shaft size: 2.5593 in / 65.007 mm
• Min standard tunnel size: 2.7509 in / 69.873 mm
• Max standard tunnel size: 2.7515 in / 69.887 mm
• Max wall at crown: 0.0957 in / 2.43 mm
• Max overall length: 1.0276 in / 26.1 mm

Fitment:

• Chevrolet Avalanche 2007-2013
• Chevrolet Avalanche 1500 2002-2006
• Chevrolet Avalanche 2500 2002-2006
• Chevrolet Express 1996-2020

So, if you’re looking to upgrade your engine's internals and want something that can handle the heat, these ACL Race Series Bearings are a solid choice. They’ve got the engineering to back up their performance, and they fit a range of Chevy models, ensuring you get the right parts for your ride.