What does '0.030 inch undersize' mean for these bearings?

This means the bearings are made to fit a crankshaft that has been machined down by 0.030 inches. This is common when a crankshaft has wear and needs to be resurfaced during an engine rebuild.

Do these bearings come with installation hardware?

This set includes the connecting rod bearings only. You will need to reuse your original hardware or source new hardware separately.

Are these bearings suitable for a stock engine rebuild?

Yes, these are direct replacement bearings. If your crankshaft has been machined to the 0.030 inch undersize specification, they are suitable for a stock rebuild.

Specifications

Brand: ACL
Part #: 6B1238A-30

ACL WHEN STOCK EXHAUSTED USE 6B1238A-.75 Engine Connecting Rod Bearing Set

Name: ACL WHEN STOCK EXHAUSTED USE 6B1238A-.75 Engine Connecting Rod Bearing Set
Brand: ACL
SKU: acl-acl-when-stock-exhausted-use-6b1238a-75-engine-connecting-rod-bearing-set-t14-633273
Price: 14.04 USD
Availability: BackOrder

$14.04

On Backorder

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

Worn-out connecting rod bearings cause engine noise and damage. This ACL bearing set is a direct fix.

Key Features

Connecting Rod Bearing Set — Replaces worn bearings to restore proper engine function.
0.030 inch undersize — Designed for use with a machined crankshaft.
Direct fit replacement — Installs in place of stock bearings.