What is the difference between standard size and undersize bearings?

Standard size bearings are meant to be used with a crankshaft that is within factory specifications. Undersize bearings, like those marked -010 or -020, are used when a crankshaft has been machined down to correct for wear or damage.

Do these bearings come with assembly lube?

This ACL Race Series main bearing set includes the bearings themselves. It does not typically come with assembly lube, which is a separate product you'll need to purchase to properly lubricate the bearings and crankshaft during installation.

What is the 'Race Series' designation from ACL?

ACL's Race Series bearings are designed with enhanced performance in mind. They often feature tighter tolerances and materials chosen for improved durability under higher loads and RPMs compared to standard OE replacement bearings.

Specifications

Brand: ACL
Part #: 5M909HX-STD
UPC: 9315726225110

ACL Chevy 262/267/302/305/307/327/350 Race Series Standard Size Main Bearing Set

Name: ACL Chevy 262/267/302/305/307/327/350 Race Series Standard Size Main Bearing Set
Brand: ACL
SKU: acl-acl-chevy-262-267-302-305-307-327-350-race-series-standard-size-main-bearing-t14-487189
Price: 96.23 USD
Availability: BackOrder

$96.23

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ACL Chevy 262-350 Race Series Standard Size Main Bearing Set. Built for performance builds.

Key Features

Fits many Chevrolet and GMC V8 engines from 1968-1973, including 262, 267, 302, 305, 307, 327, and 350 cubic inch displacements.
ACL Race Series main bearings are built for performance applications.
Standard size bearings ensure a direct fit on stock or reconditioned crankshafts within factory tolerances.
Well-built components designed for reliable crankshaft support.

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About this part

Product Details

If you're rebuilding a classic Chevy V8 like a 262, 305, or 350, these ACL Race Series main bearings are a solid choice for your build. They're designed to handle the demands of performance engines, providing a reliable foundation for your crankshaft.

ACL has been making engine bearings for a long time, and this Race Series set uses their experience to offer well-built components. They're made to the correct specifications for a standard fit, meaning they'll work with your stock or performance crankshaft without needing extra machining, as long as your crank journals are within factory tolerances. This set is a popular option when you're looking for dependable bearings for a street performance or mild race application.

This set includes the main bearings needed for your engine. Always make sure to check your crankshaft journals for any wear or damage before installation, and follow proper lubrication and assembly procedures to get the most out of these bearings.