What does '.40mm oversized' mean for these rod bearings?

This means the bearings are manufactured to be slightly larger than standard size. They are intended for use when the crankshaft journals have been machined undersize by .40mm (0.016 inches) during an engine rebuild or repair. This ensures the correct oil clearance is achieved.

What is trimetal construction?

Trimetal bearings feature a multi-layer design. They typically consist of a steel backing for strength, a copper-lead alloy layer for embeddability and load capacity, and a final overlay of babbitt material for conformability and wear resistance.

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

This set includes the rod bearings themselves. You will also need to ensure your crankshaft journals are properly machined and measured, and you should always follow the manufacturer's torque specifications when installing them. New rod bolts are also recommended for most engine rebuilds.

ACL 1967-2007 Chevy V8 305/350/400 .40mm Oversized Trimetal Rod Bearing Set

Specifications

Brand: ACL
Part #: 8B663P-40
UPC: 9315726101759

ACL 1967-2007 Chevy V8 305/350/400 .40mm Oversized Trimetal Rod Bearing Set

Name: ACL 1967-2007 Chevy V8 305/350/400 .40mm Oversized Trimetal Rod Bearing Set
Brand: ACL
Price: 34.98 USD
Availability: InStock

$34.98

On Backorder

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

Fits 1967-1997 Chevy Camaro. ACL .40mm oversized trimetal rod bearing set for V8 305/350/400 engines.

Key Features

Fits 1967-2007 Chevrolet Camaro, Corvette, Impala, and Silverado 2500.
Set includes trimetal rod bearings for V8 305, 350, and 400 cubic inch engines.
Bearings are .40mm (0.016 inches) oversized for use with machined crankshaft journals.
Trimetal construction offers a strong steel backing, copper-lead alloy, and babbitt overlay for durability and performance.
Helps maintain proper oil clearance and reduce friction in performance or rebuilt engines.

Secure CheckoutFast Shipping631-982-0042

Will this fit your vehicle?

Product Details

Already running a rebuilt or performance V8 engine in your classic Chevy? This trimetal rod bearing set from ACL is the next piece of the puzzle for ensuring proper oil clearance and long-term engine health. These bearings are specifically sized at .40mm (0.016 inches) oversized, which is crucial if your crankshaft journals have been machined undersize during an engine rebuild. ACL is well-known for making solid engine bearings, and this set is built to handle the demands of a 305, 350, or 400 small-block Chevy V8.

The trimetal construction means these bearings have multiple layers of material, including a steel backing for strength, a copper-lead alloy for embeddability and strength, and a nickel barrier layer. The overlay is a babbitt material that provides excellent conformability to the crankshaft and good wear characteristics. This combination helps to maintain consistent oil pressure and reduce friction, which is vital for keeping your engine running smoothly and preventing premature wear, especially if you've already upgraded other engine components.

When installing these bearings, it's important to ensure your crankshaft journals have been properly cleaned and measured to confirm they are indeed .40mm undersize. Using the correct torque specifications from your engine's service manual is also critical for proper bearing crush and function. This set includes all the necessary rod bearings for a V8 engine.