What does the .10 undersize specification mean for these bearings?

The '.10 undersize' means these bearings are designed to fit a crankshaft that has been machined down by 0.010 inches (or 0.25mm). This is a common practice when rebuilding an engine to clean up minor imperfections or wear on the crankshaft journals.

What is the benefit of the CT-1 coating on these bearings?

The CT-1 coating is applied to help reduce friction between the bearing and the crankshaft journal. This can lead to improved wear resistance, especially during the critical engine break-in period, and can contribute to overall engine longevity.

Are these bearings suitable for a stock LS engine rebuild?

While these are Race Series bearings and feature a CT-1 coating, they are designed for the .010 undersize crankshaft. If your crankshaft is still at standard size, you would need a standard size bearing. These are a good choice for performance-oriented rebuilds where the crankshaft has been machined.

ACL Chevy V8 4.8/5.3/5.7/6.0L Race Series .10 Oversized Main Bearing Set - CT-1 Coated

Specifications

Brand: ACL
Part #: 5M7298HC-10
UPC: 9315726457948

ACL Chevy V8 4.8/5.3/5.7/6.0L Race Series .10 Oversized Main Bearing Set - CT-1 Coated

Name: ACL Chevy V8 4.8/5.3/5.7/6.0L Race Series .10 Oversized Main Bearing Set - CT-1 Coated
Brand: ACL
Price: 226.20 USD
Availability: InStock

$226.20

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ACL Chevy V8 4.8/5.3/5.7/6.0L Race Series .10 Oversized Main Bearing Set - CT-1 Coated. For GM LS Gen III - IV engines.

Key Features

Fits many GM LS Gen III - IV V8 engines (4.8L, 5.3L, 5.7L, 6.0L).
Race Series main bearings are built for high-performance applications.
Features a 270-degree oil groove for improved oil flow and pressure.
Bearings are .010 inch (0.25mm) undersize for use with machined crankshafts.
CT-1 coating helps reduce friction and wear during break-in and operation.
Well-built components from ACL, a trusted name in engine bearings.

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Will this fit your vehicle?

Product Details

When you're rebuilding a GM LS engine, especially one that's going to see some hard use, the main bearings are critical. This Race Series set from ACL is built for that purpose. They feature a 270-degree oil groove, which helps ensure you maintain oil pressure even under high loads and RPMs, a common concern with these popular V8s.

These bearings are .010 inches undersize, meaning they're meant for crankshafts that have been machined down to match. The CT-1 coating is a notable feature that helps reduce friction and wear, especially during the critical break-in period and under demanding conditions. This coating contributes to the overall durability and longevity of your engine build. ACL is known for making well-built engine components, and this bearing set reflects that reputation.

This set is designed for GM LS Gen III and Gen IV V8 engines, covering displacements from 4.8L up to 6.0L. Make sure your crankshaft has been properly machined to the .010 undersize specification before installing these bearings. If you're looking for a solid option for your LS engine build, this ACL set is a popular choice.