What is the advantage of a 120-degree oil groove?

A 120-degree oil groove helps to distribute oil more evenly around the bearing surface. This can lead to better lubrication and reduced wear compared to a standard 360-degree groove, especially under demanding conditions.

Do these bearings require a special crankshaft?

No, this is a standard size main bearing set. It is designed to be used with a crankshaft that is within factory specifications and has not been ground undersize.

What vehicles are covered by this bearing set?

This set fits numerous GM vehicles equipped with LS Gen III and Gen IV V8 engines, including various models of Chevrolet Silverado, Tahoe, Suburban, Corvette, Express vans, and Cadillac Escalade, among others, from model years 1999 through 2020.

ACL Main Bearing Set 5M7299H-STD - Chevy LS Gen III/IV

Name: ACL Chevy V8 LS Gen III/IV Standard Size Main Bearing Set
Brand: ACL
Price: 162.27 USD
Availability: InStock

ACL Chevy V8 LS Gen III/IV Standard Size Main Bearing Set

$162.27

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ACL Chevy V8 LS Gen III/IV Standard Size Main Bearing Set. Fits GM LS Gen III - IV engines with a 120-degree oil groove.

Key Features

Fits 1999-2020 Chevrolet, Buick, and Cadillac vehicles with LS Gen III and Gen IV V8 engines.
Standard size bearings are designed for use with a factory-spec or undamaged crankshaft.
Features a 120-degree oil groove for improved oil distribution to the crankshaft.
ACL is a well-known manufacturer of engine bearings.

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Will this fit your vehicle?

Product Details

ACL has been making engine bearings for decades, and this main bearing set for your Chevy LS Gen III or IV engine is one of their staples. When you're rebuilding an LS engine, especially one that's seen a lot of miles or is destined for performance use, replacing the main bearings is a critical step. These bearings are designed to handle the loads and stresses that come with these popular V8s, ensuring smooth rotation of your crankshaft.

This set is for standard size crankshafts, meaning you don't need to have your crankshaft ground undersize. A notable feature is the 120-degree oil groove, which helps distribute oil more evenly around the bearing surface compared to a 360-degree groove. This improved oiling can lead to better lubrication and reduced wear, particularly important in high-performance or heavy-duty applications. ACL uses well-built materials to ensure these bearings stand up to the demands of your LS engine.

This set is specifically for the Gen III and Gen IV LS engines found in a wide range of GM vehicles. Make sure to verify fitment for your specific year and model. When installing, always follow the manufacturer's torque specifications and ensure your crankshaft journals are clean and within factory tolerances.