Perfect Circle CB663HN1 H-Series Connecting Rod Bearing Oversize - 001

The Perfect Circle CB663HN1 is a high-performance H-Series connecting rod bearing designed for small block Chevrolet and GM LS engines. This bearing features a .001" oversized design, providing additional clearance for performance applications.

Key Features:

• Developed primarily for NASCAR racing but suitable for all types of competition engines
• Hardened steel backing with thin overlay for durability
• Medium level of eccentricity with high crush factor
• Enlarged chamfers for greater crankshaft fillet clearance
• Manufactured without flash plating for better seating
• Recommended for engines running in medium to high RPM range

The H-Series bearing design is particularly well-suited for performance engines that operate at elevated RPM levels and require enhanced durability under racing conditions. Sold individually.