Perfect Circle MS667P10 Main Bearing Set .010 Undersize Pontiac V8

The Perfect Circle MS667P10 is a precision-engineered main bearing set designed for Pontiac V8 engines requiring .010 inch crankshaft undersize bearings. This P-Series bearing set is part of the Clevite 77 bearing family, representing a proven tri-metal design ideal for high-performance and demanding applications.

Construction and Materials:

• Tri-metal cast copper lead construction (TM-77 material)
• Steel backing for superior structural support
• Cast copper-lead intermediate layer for load capacity
• Electroplated lead-tin-copper overlay on running surface
• 1/2 groove design for enhanced oil distribution

Performance Features:

• Higher eccentricity to compensate for high-load factors and engine distortion
• High crush factor for secure bearing retention
• Extended oil grooves on both halves for improved lubrication
• Excellent conformability, embedability, and fatigue resistance
• Suitable upgrade from bimetal bearings due to increased load capacity

This bearing set is ideal for engine rebuilds where more demanding use is anticipated, including heavy-duty applications, motorsports, and street performance builds. The P-Series design makes it the most versatile replacement engine bearing, suitable for most OE applications while providing performance capabilities beyond original equipment specifications. Set includes 5 main bearings with .010 inch crankshaft undersize for proper clearance on reground crankshafts.