Description

Proper rod bearing clearance is critical to engine longevity and reliability, especially in high-performance Small Block Chevy applications where sustained RPM and load stress the rotating assembly. The CB-663P-40 delivers OEM-grade construction with precise 0.040 in undersize geometry, ensuring optimal oil film thickness and reducing friction-related wear. Whether you’re rebuilding after a race season or restoring a classic engine, this bearing maintains the tight tolerances your engine demands.