Perfect Circle MS540P10 P-Series Main Bearing Set 0.010" Undersize Chrysler Small Block

The Perfect Circle MS540P10 is a P-Series main bearing set designed for Chrysler 273/318/340 small block engines, featuring 0.010" undersize dimensions and tri-metal construction. This set includes 5 bearings with 1/2 groove configuration, providing superior performance for engine rebuilds and performance applications.

Advanced Tri-Metal Construction:

P-Series bearings are constructed of tri-metal cast copper lead, featuring a steel back for support, a cast copper lead lining to withstand the loads of engine operation, and an electroplated babbit overlay on the running surface. This design produces superior conformability, embedability, slipperiness, and fatigue resistance not found in original equipment and competitive bimetal bearings.

Key Features:

• High crush qualities for maximum bearing retention
• Higher eccentricity and high crush factor to compensate for high-load factors and bore distortion
• Reduced overlay thickness to prevent fatigue
• Additional embedability makes it ideal for older engines and rebuilds where more demanding use is anticipated, such as heavy duty, motorsports, or street performance
• Suitable upgrade from bimetal engine bearings due to increased load capacity

Clevite P-Series main bearings are intended for high-revving engines and represent the proven performance that has made Clevite the choice of engine builders for decades. Perfect Circle bearings, now part of the MAHLE/Clevite family, deliver the reliability and durability required for both street and performance applications.