MICHIGAN 77 CB663P1 P-Series Connecting Rod Bearing Undersize - 0.001

The MICHIGAN 77 CB663P1 is a high-performance P-Series connecting rod bearing designed for Chevrolet small block and LS engines. This bearing features 0.001 inch undersize dimensions, making it ideal for machined crankshafts or performance rebuilds requiring precise clearances.

Construction and Design:

• Tri-metal TM-77 construction combines copper-lead alloy layer with steel backing and electroplated babbitt metal overlay for superior strength and durability
• Higher eccentricity and high crush factor compensate for rod bore distortion in high-RPM applications
• Hardened steel backing with extra-thin overlays and dowel holes in lower sections for aluminum rod compatibility
• Provides excellent slipperiness and conformability characteristics

Applications:

• Compatible with Chevrolet V8 262, 267, 302, 305, 307, 327, 350, and 400 cubic inch engines
• Fits LS-series engines including 4.8L, 5.3L, 5.7L, 6.0L, 6.2L, and 7.0L (LS1/LS2/LS3/LS6/LS7)
• Specifically intended for high-revving engines where high RPM causes rod bores to narrow

This bearing is sold individually, allowing for precise replacement or custom bearing selection during engine assembly. The P-Series represents one of the first performance bearing designs from Clevite 77 and remains a trusted choice for stock to performance engine builds.