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

This means the bearings are made to fit a crankshaft that has been machined down by 0.040 inches. This is common when rebuilding an engine with a worn crankshaft.

What is TriMetal construction?

TriMetal is a layered bearing material. It's known for its strength and ability to handle the high loads and pressures found in an engine's rotating assembly.

Do I need to buy anything else to install these bearings?

You will need engine assembly lubricant to properly coat the bearings before installation. It is also recommended to check and clean the connecting rods and crankshaft thoroughly.

Specifications

Brand: ACL
Part #: 8B663PO/S2-40

ACL TRIMETAL - Chevrolet V8 305-350-400 1967-07 Engine Connecting Rod Bearing Set

Name: ACL TRIMETAL - Chevrolet V8 305-350-400 1967-07 Engine Connecting Rod Bearing Set
Brand: ACL
SKU: acl-acl-trimetal-chevrolet-v8-305-350-400-1967-07-engine-connecting-rod-bearing--t14-632679
Price: 32.90 USD
Availability: BackOrder

$32.90

On Backorder

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

ACL TriMetal connecting rod bearings for Chevy V8 305-350-400 (1967-07). These are 0.040 inch undersize for rebuilding worn engines.

Key Features

TriMetal construction — layered material for strength and load capacity.
0.040 inch undersize — fits crankshafts machined down by 0.040 inches.
Designed for Chevrolet 305, 350, and 400 V8 engines — covers a wide range of popular small-block Chevy applications.
Direct fit for specified engine models and years.