MICHIGAN 77 CB663HN1 H-Series Connecting Rod Bearing Small Block Chevy Undersize - 001

The MICHIGAN 77 CB663HN1 is a high-performance H-Series connecting rod bearing designed for Small Block Chevy engines. This precision-engineered bearing features a .001 inch crankshaft undersize, making it ideal for performance applications where extra oil clearance is needed.

Key Features:

• H-Series tri-metal construction with TM-77 material for superior durability
• Hardened steel backing with thin bearing overlay for optimal load capacity
• Medium level of eccentricity with high crush factor for secure retention
• Enlarged chamfers provide greater crankshaft fillet clearance
• No flash plating for improved seating characteristics
• Capable of carrying loads up to 12,000 PSI
• Babbit outer layer with copper-lead alloy intermediate layer

Originally developed for NASCAR racing, H-Series bearings are suitable for all types of competition engines and high-performance applications. These bearings are recommended for crankshafts with oversize fillets and engines operating in the medium to high RPM range. Compatible with Chevrolet V8 engines including 305, 307, 327, 350, and 400 cubic inch displacements, as well as LS-series engines (4.8L, 5.3L, 5.7L, 6.0L, 6.2L, 7.0L). Sold individually.