What is the difference between standard size and undersize bearings?

Standard size bearings are meant to be used with a crankshaft that is still at its original factory dimensions. Undersize bearings, like 0.010" or 0.020", are used when the crankshaft has been machined down to correct for wear or damage.

What Chevy V8 engines does this bearing set fit?

This set is designed for Chevy V8 engines with displacements of 262, 267, 302, 305, 307, 327, and 350 cubic inches. This covers many popular small-block Chevy applications.

Does this main bearing set include the necessary installation hardware?

This listing is for the main bearing set only. You will need to ensure you have the correct assembly lube and follow proper installation procedures as outlined by ACL or your engine builder.

Specifications

Brand: ACL
Part #: 5M909H-STD
UPC: 9315726177617

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-t14-487188
Price: 96.23 USD
Availability: BackOrder

$96.23

On Backorder — Expected to ship by Apr 23, 2026

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

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

Key Features

Fits 42+ vehicle make/model combinations with Chevy V8 engines.
Standard size bearings for use with an unmachined crankshaft.
Race Series construction with a strong overlay material for performance applications.
Designed for Chevy V8 engines with displacements from 262 to 350 cubic inches.
Supports crankshaft and ensures smooth engine operation.

Secure CheckoutFast Shipping631-982-0042

Will this fit your vehicle?

About this part

Product Details

ACL has been making engine bearings for decades, and this Race Series main bearing set for your Chevy V8 is one of their staples. These bearings are designed to handle the demands of performance engines, whether you're building a street machine or a dedicated race car. They replace your stock main bearings, which are critical for supporting the crankshaft and ensuring smooth operation.

This set is built with a special overlay material that's known for its strength and durability under high loads. The standard size means they're meant to be used with an unmachined crankshaft, making them a straightforward replacement for many rebuilds. If you're working on a Chevy small-block engine with displacements from 262 cubic inches all the way up to 350, these bearings are a solid choice for keeping your bottom end reliable.

When you're rebuilding an engine, especially one that will see hard use, using well-built bearings like these from ACL is important. They help maintain proper oil clearance, which is key to preventing premature wear and ensuring your engine lasts. Make sure to follow the manufacturer's installation instructions carefully, paying close attention to oil clearances and torque specifications.