What is the benefit of a 'narrowed' main bearing set?

A narrowed main bearing set has slightly less surface area than a standard bearing. This helps ensure that the oil pressure is maintained across the reduced surface, which is important for performance engines that experience higher loads and stresses on the crankshaft.

What type of engine applications are these bearings best suited for?

These ACL Race Series bearings are designed for performance and racing applications. They feature a special overlay material and a narrowed design to handle the increased demands of high-performance engines.

Are these bearings a direct replacement for all Chevrolet V8 engines?

No, these bearings are specifically designed for Chevrolet V8 engines with displacements ranging from 396 to 454 cubic inches. Always verify your engine's specific displacement and model year compatibility before purchasing.

Specifications

Brand: ACL
Part #: 5M829HN-01

ACL Chev V8 396-402-427-454 Race Series (Narrowed) Engine Crankshaft Main Bearing Set

Name: ACL Chev V8 396-402-427-454 Race Series (Narrowed) Engine Crankshaft Main Bearing Set
Brand: ACL
SKU: acl-acl-chev-v8-396-402-427-454-race-series-narrowed-engine-crankshaft-main-bear-t14-633322
Price: 142.46 USD
Availability: BackOrder

$142.46

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Key Features

Fits Chevrolet V8 engines 396-454 cubic inches.
Race Series bearings are built for performance applications.
Narrowed design is suitable for performance crankshafts.
Features a special overlay material for wear resistance and load capacity.
Designed to maintain oil clearance under high stress.

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About this part

Product Details

ACL has been making engine bearings for decades, and this Race Series main bearing set for your big-block Chevrolet V8 is one of their staples. These bearings are built for performance applications, offering a narrowed design that's crucial when you're working with a performance crankshaft. The Race Series is known for its well-built construction, designed to handle the increased stresses of a performance engine build.

When you're building a performance engine, especially one that's going to see hard use, the main bearings are a critical component. They support the crankshaft and need to maintain a precise oil clearance under high loads. ACL uses a special overlay material in their Race Series bearings that helps with wear resistance and load capacity. The narrowed design means there's slightly less surface area, which helps ensure that the remaining area has enough oil pressure to keep the crank spinning smoothly, even when you're pushing the engine hard.

This set is specifically designed for Chevrolet V8 engines with displacements from 396 up to 454 cubic inches. If you're rebuilding or modifying a classic Chevy big-block for racing or high-performance street use, these bearings are a solid option to consider for the crankshaft support system.