Perfect Circle CB663HND H-Series Connecting Rod Bearing with Dowel Hole

The Perfect Circle CB663HND is a high-performance H-Series connecting rod bearing developed primarily for NASCAR racing applications but suitable for all types of competition engines. These bearings feature a medium level of eccentricity, high crush factor, hardened steel backs, and thin overlays designed to withstand the demands of high-performance engine builds.

Key Features:

• Tri-metal TM-77 bearing material for superior strength and durability
• Dowel pin hole in cap half for use with aluminum connecting rods
• Hardened steel backing with thin overlay and enlarged chamfers for greater crankshaft fillet clearance
• Made without flash plating for better seating and break-in
• Standard size bearing sold individually

H-Series bearings are recommended for use with crankshafts that have oversize fillets and where engines run in the medium to high RPM range. They should also be used if contact patterns obtained with Clevite P-Series bearings are too narrow. The dowel hole feature makes this bearing ideal for aftermarket aluminum connecting rod applications where additional bearing retention is required.