Perfect Circle MS1041P20 P-Series Main Bearing Set 0.020" Undersize AMC V8

The Perfect Circle MS1041P20 is a premium P-Series main bearing set engineered specifically for AMC V8 engines ranging from 290 to 401 cubic inches. This complete set includes 5 bearings with a 0.020 inch undersize specification, designed for engines with crankshafts that have been machined to this dimension.

Advanced Tri-Metal Construction:

• Hardened steel backing provides exceptional strength and support
• Cast copper-lead alloy center layer delivers superior load-bearing capacity
• Electroplated babbitt overlay on running surface ensures optimal slipperiness and conformability
• Extra-thin overlay design prevents overlay fatigue during operation

Performance-Oriented Design:

• Higher eccentricity compensates for high-load factors and bore distortion
• Increased crush factor ensures better bearing retention and seating
• 1/2 groove configuration maintains effective oil distribution
• Engineered for high-revving engine applications

Perfect Circle bearings are part of the legendary Clevite 77 bearing family, now manufactured by MAHLE. These bearings offer a superior combination of embedability, fatigue resistance, and conformability that exceeds many original equipment specifications. Ideal for engine rebuilds, performance applications, and restoration projects on AMC-powered vehicles from 1967-1991.