Clevite CB-663HNDC H-Series Connecting Rod Bearing Set

The Clevite CB-663HNDC is a high-performance tri-metal connecting rod bearing from the renowned H-Series line, engineered for demanding racing and high-performance engine applications. Originally developed for NASCAR competition, these bearings are suitable for all types of performance and racing engines that operate in medium to high RPM ranges.

Key Features:

• Tri-metal construction with hardened steel backing, copper-lead alloy intermediate layer, and thin Babbitt overlay
• Medium level of eccentricity to minimize rod housing bore deflection and deformation
• High crush factor ensures superior heat transfer and resistance to rotation under minimal oil film conditions
• Enlarged chamfers provide greater crankshaft fillet clearance for aftermarket performance crankshafts with larger fillet radii
• Manufactured without flash tin plating for better seating and improved performance characteristics
• Capable of carrying loads up to 12,000 PSI
• Available in standard size with options for extra clearance configurations

H-Series bearings are specifically recommended for use with crankshafts that have oversize fillets and in engines running medium to high RPM ranges. They are ideal for racing applications, high-performance street engines, and situations where Clevite P-Series bearings produce contact patterns that are too narrow. The distinctive coloration of H-Series bearings comes from the absence of flash plating, a design choice made after discovering that professional engine builders were removing it for optimal performance.