What does '0.040 inch undersize' mean for these bearings?

This means the bearings are manufactured to fit crankshaft journals that have been machined down by 0.040 inches. This is a common practice during engine rebuilding to ensure a proper fit on journals that have been worn or resurfaced.

What is the benefit of the 60% more silicon in these bearings?

The higher silicon content in the aluminum alloy helps to improve the conditioning of the crankshaft journal surfaces. This leads to better wear resistance and a reduced risk of the bearing seizing to the journal.

Are these bearings sold as a set for all connecting rods?

Yes, Clevite connecting rod bearings are typically sold as a complete set, sufficient for all connecting rods in the specified engine configuration.

Clevite GM Pass & Trk215 265 300 301 340 350 V8 1961-81 Con Rod Bearing Set

Specifications

Brand: Clevite
Part #: CB610A40(8)
UPC: 027067927521

Clevite GM Pass & Trk215 265 300 301 340 350 V8 1961-81 Con Rod Bearing Set

Name: Clevite GM Pass & Trk215 265 300 301 340 350 V8 1961-81 Con Rod Bearing Set
Brand: Clevite
Price: 29.49 USD
Availability: InStock

$29.49

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Clevite 0.040 inch undersize connecting rod bearings for GM 265-350 V8 engines (1961-81). Features 60% more silicon for improved journal conditioning.

Key Features

This is a 0.040 inch undersize connecting rod bearing set.
Features Clevite BiMetal aluminum silicon construction.
Contains 60% more silicon than comparable competitive replacements.
Improved journal surface conditioning for greater seizure and wear resistance.
Designed for GM passenger cars and trucks with 265, 300, 301, 340, and 350 V8 engines.
Covers a wide range of model years from 1961 to 1981.

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Will this fit your vehicle?

Product Details

These Clevite connecting rod bearings are 0.040 inch undersize, meaning they're designed to be used when the crankshaft journals have been machined down by 0.040 inches during an engine rebuild. They're built with a BiMetal aluminum silicon construction, featuring 60% more silicon than many other bearings. This advanced material composition helps to better condition the crankshaft journal surfaces, which in turn offers greater resistance to seizure and wear.

Designed for a range of GM passenger cars and trucks from 1961 to 1981, these bearings are a solid option for anyone rebuilding a 265, 300, 301, 340, or 350 V8 engine. The increased silicon content not only aids in journal conditioning but also contributes to the overall durability and dependability of the bearing, carrying on Clevite's tradition in engine components. They fit right into many popular GM vehicles from that era, like the Buick Skylark, Oldsmobile Delta 88, and Pontiac Firebird.