What does '01 Oversize' mean for these bearings?

The '01 Oversize' designation means these bearings are 0.010 inches smaller in diameter than standard bearings. They are intended for use when the crankshaft journals have been machined down by 0.010 inches to correct for wear or damage.

What is the CT-1 coating, and why is it important?

The CT-1 coating is a special surface treatment applied to the bearings. It helps to reduce friction between the bearing and the crankshaft, and it also improves oil retention, which is beneficial for engine lubrication, especially under high-performance conditions.

Are these bearings suitable for a stock engine rebuild?

These are ACL Race Series bearings with a CT-1 coating, indicating they are intended for performance or race applications. While they can be used in a stock rebuild if the crankshaft has been machined to the 0.010 inch undersize, they are generally designed for higher stress levels than a typical stock engine might experience.

ACL Chevrolet V8 396/402/427/454 Race Series 01 Oversize Main Bearing Set - CT-1 Coated

Specifications

Brand: ACL
Part #: 5M829HC-01
UPC: 9315726467091

ACL Chevrolet V8 396/402/427/454 Race Series 01 Oversize Main Bearing Set - CT-1 Coated

Name: ACL Chevrolet V8 396/402/427/454 Race Series 01 Oversize Main Bearing Set - CT-1 Coated
Brand: ACL
SKU: acl-acl-chevrolet-v8-396-402-427-454-race-series-01-oversize-main-bearing-set-ct-t14-372725
Price: 159.27 USD
Availability: BackOrder

$159.27

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ACL Chevrolet V8 396-454 Race Series 01 Oversize Main Bearing Set - CT-1 Coated. For engines needing a 0.010 inch undersize bearing.

Key Features

Fits 1965-1974 Chevrolet Bel Air, Biscayne, Blazer, Brookwood, C10 Pickup, C10 Suburban, C20 Pickup, C20 Suburban, C30 Pickup, Camaro, Caprice, Chevelle, Chevy II, Corvette, El Camino, Estate, G10 Van, G20 Van, G30 Van, Impala, K10 Pickup, K10 Suburban, K20 Pickup, K20 Suburban, K30 Pickup, Kingswood, Laguna, Malibu, Monte Carlo, Nova, P10 Van, P20 Van, P30 Van, Townsman, and 1972-1974 Excalibur Phaeton.
Fits 1968-1974 GMC C15/C1500 Pickup and C15/C1500 Suburban.
Set includes main bearings that are 0.010 inch undersize for use with a machined crankshaft.
Features a CT-1 coating to reduce friction and improve oil retention.
Designed for Chevrolet V8 engines including 396, 402, 427, and 454 cubic inch displacements.
ACL Race Series bearings are a well-built option for performance engine builds.

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Will this fit your vehicle?

Product Details

When you're rebuilding a Chevrolet V8 like the 396, 402, 427, or 454, getting the crankshaft bearings right is critical for engine longevity and performance. This set from ACL is built for those race-oriented builds, offering a 0.010 inch undersize fit for crankshafts that have been machined to correct for wear or damage. The CT-1 coating on these bearings helps reduce friction and improve oil retention, which is especially important under the higher loads of performance driving.

ACL has been making engine bearings for a long time, and this Race Series set is a well-built option for serious engine work. The 0.010 inch undersize means they're designed to be used when your crankshaft journals have been ground down by 0.010 inches. This coating isn't just for show; it helps the bearing surface handle the heat and stress of a performance engine, providing a solid foundation for your build. They fit a wide range of Chevrolet V8 applications from the mid-60s through the mid-70s, covering popular models like the Impala, Chevelle, Camaro, and Corvette.

If you're in the process of an engine overhaul or a performance build, this set of main bearings is a key component. Make sure to confirm your crankshaft has been machined to the 0.010 inch undersize specification before ordering, as these bearings will not fit a standard-sized crankshaft. Proper installation according to your engine's service manual is essential for optimal performance and durability.