What does 'narrowed' mean for these rod bearings?

A 'narrowed' bearing has a slightly reduced width compared to a standard bearing. This allows for extra clearance between the bearing and the crankshaft, which is important in high-performance engines to manage increased heat and ensure proper oil flow under extreme conditions.

What is the 'HN' designation in the part number?

The 'HN' in the ACL part number 8B663HN-STD indicates that these bearings feature a high-performance overlay. This is a specialized coating designed to provide enhanced durability and resistance to wear, which is crucial for racing applications.

Are these bearings suitable for a daily driver engine?

While these bearings are well-built and durable, they are specifically designed for racing applications. For a standard daily driver, a regular ACL bearing set might be more appropriate. These are best suited for engines that will be subjected to high RPMs and significant stress.

ACL Race Series Narrowed Conrod Rod Bearing Set 8B663HN-STD

Name: ACL Chevrolet V8 305-350-400 Race Series Narrowed Conrod Rod Bearing Set
Brand: ACL
Price: 77.67 USD
Availability: InStock

ACL Chevrolet V8 305-350-400 Race Series Narrowed Conrod Rod Bearing Set

$77.67

In Stock

ACL Chevrolet V8 305-350-400 Race Series Narrowed Conrod Rod Bearing Set. These bearings are built for high-performance applications.

Key Features

Fits 112+ vehicle make/model combinations.
ACL Race Series bearings are built for high-performance and racing applications.
Narrowed design allows for increased clearance, improving oil flow and reducing friction in demanding engines.
Features a high-performance overlay ('HN') for added durability and wear resistance.
Standard size bearings for use with crankshaft journals within factory specifications.
Designed for Chevrolet V8 engines including 305, 350, and 400 cubic inch displacements.

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Will this fit your vehicle?

Product Details

You get a full set of narrowed conrod rod bearings in this kit, which means you're ready to get your high-performance Chevrolet V8 engine built. These ACL Race Series bearings are specifically designed for racing applications, offering a more robust solution than standard bearings. They are narrowed to allow for increased clearance, which is crucial for managing the extra stress and heat generated in a performance engine. This means better oil flow and reduced friction when you're pushing your engine hard.

ACL has a solid reputation for making well-built engine components, and these bearings are no exception. They use advanced materials and manufacturing processes to ensure they can handle the demands of racing. The 'HN' in the part number indicates a high-performance overlay, which adds an extra layer of durability and wear resistance. When you're building a serious engine, the details matter, and these bearings are designed to be a critical part of a reliable performance setup.

This set is a standard size, so make sure your crankshaft journals are within factory specifications for a proper fit. If you're building a performance V8 for your Chevrolet, Buick, or Cadillac, these bearings are a popular choice for their reliability under pressure.