Clevite CB1238P40 Performance Connecting Rod Bearing Pair .040" Undersize

The Clevite CB1238P40 is a high-performance connecting rod bearing pair designed for GM V6 engines, including 2.8L, 3.1L, and 3.4L applications. This P-series bearing features .040" (.040 inch) undersize dimensions for use with reground crankshafts or worn journal surfaces.

Key Features:

• TriMetal construction with steel back, copper-lead lining, and electroplated Babbitt overlay
• P-series design with high eccentricity for maximum oil clearance control
• Hardened steel backing for superior strength and fretting resistance
• High crush design for maximum retention and heat transfer
• Reduced overlay thickness to prevent overlay fatigue
• .040" undersize for reground crankshafts
• Precision manufactured with 100% bored inside diameters

Clevite 77 performance bearings are engineered for demanding applications where durability and precise oil clearance control are critical. The TriMetal design provides optimal conformability, embedability, and fatigue resistance, making these bearings suitable for both street performance and competition engines. Each bearing pair is manufactured to strict tolerances to ensure consistent fit and reliable operation.