What is the undersize on these bearings?

These ACL Race Series connecting rod bearings feature a .0010 inch undersize. This means they are intended for use with a crankshaft that has been machined down by 0.0010 inches from its original size.

What is the advantage of a tri-metal overlay?

The tri-metal construction offers a good balance of hardness and embeddability. This helps the bearing handle higher loads and temperatures while also being able to absorb small particles of dirt or debris, which can help protect the crankshaft.

Are these bearings suitable for a stock rebuild?

While these are well-built bearings, they are part of ACL's Race Series, designed for higher load and temperature applications. For a standard, stock rebuild with no modifications, standard OE-style bearings might also be considered, but these will certainly perform well if the engine sees any spirited driving.

ACL Connecting Rod Bearing Set 1B743H-10

Name: ACL Chevrolet V8 396-402-427-454 Race Series Engine Connecting Rod Bearing Set
Brand: ACL
SKU: acl-acl-chevrolet-v8-396-402-427-454-race-series-engine-connecting-rod-bearing-s-t14-631658
Price: 36.97 USD
Availability: BackOrder

ACL Chevrolet V8 396-402-427-454 Race Series Engine Connecting Rod Bearing Set

$36.97

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

ACL Chevrolet V8 396-402-427-454 Race Series Engine Connecting Rod Bearing Set

Key Features

Fits Chevrolet V8 engines 396-454ci.
ACL Race Series connecting rod bearings.
Tri-metal overlay construction for improved load handling.
Features a .0010 inch undersize for crankshafts ground undersize.
Designed for higher load and temperature applications.

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Will this fit your vehicle?

Product Details

When you're rebuilding a big block Chevrolet V8, especially one destined for performance use, the connecting rod bearings are critical. These ACL Race Series bearings are built with a tri-metal overlay that's designed to handle higher loads and temperatures than stock bearings. They feature a .0010 inch undersize, which is important to note if you're working with a crankshaft that's been ground undersize. This specific set is for Chevrolet V8 engines ranging from 396ci up to 454ci, covering a wide range of popular big block applications.

ACL has been making engine bearings for a long time, and their Race Series is a popular choice for builders who want a well-built part that can stand up to more demanding use. The tri-metal construction offers good embeddability for dirt and debris, while also providing a strong surface for the crankshaft to run against. This combination helps ensure consistent oil film and reduced friction, which is key for engine longevity and performance.

If you're in the middle of a performance build or a thorough engine overhaul on your classic Chevrolet, these ACL bearings are a solid option. Make sure to check your crankshaft's condition and size before ordering to ensure this .0010 inch undersize set is the right fit for your specific engine build.