MICHIGAN 77 CB684P20 P-Series Connecting Rod Bearing Undersize - 020

The MICHIGAN 77 CB684P20 is a P-Series connecting rod bearing with a 0.020 inch crankshaft undersize, designed for Oldsmobile V8 engines (260, 307, 350, and 403 cubic inch) from 1964-1990. This precision bearing is part of the legendary Clevite 77 performance bearing family, now manufactured by MAHLE.

Key Features:

• Tri-Metal construction combines a copper-lead alloy intermediate layer with steel backing and an electroplated babbitt overlay
• Three-layer design capable of carrying maximum loads up to 12,000 psi
• Engineered for high-revving engines with higher eccentricity and high crush factor to compensate for rod bore distortion
• Built on hardened-steel backings with extra-thin overlays
• Ideal for heavy duty, motorsports, street performance, and most OE applications
• Manufactured in the United States

The increased load capacity of the Tri-Metal design makes it a suitable upgrade from bi-metal engine bearings. The babbitt overlay provides critical surface characteristics of slipperiness and conformability, ensuring optimal performance and engine protection during demanding use.