Clevite MS-2072P-.25MM Main Bearing Set Performance P-Series

The Clevite MS-2072P-.25MM is a high-performance main bearing set designed for competition and high-RPM engines. This P-Series bearing features 0.25mm undersize dimensions for use with reground crankshafts, providing precise clearance control for optimal performance.

P-Series Design Features:

• High eccentricity design to narrow bearing contact patterns and maximize oil flow to rod bearings
• Full groove configuration in upper shells for maximum oil delivery to connecting rods
• Hardened steel backing for superior strength and fretting resistance
• High crush for maximum retention in the bore
• Reduced overlay thickness to prevent overlay fatigue and hen tracking
• Ideal for engines experiencing rod bearing oil starvation issues

Technical Specifications:

• Undersize: 0.25mm (-.25MM)
• Construction: TriMetal with steel back and aluminum-tin bearing surface
• Upper shell: 180-degree oil groove for connecting rod lubrication
• Lower shell: Ungrooved for maximum oil film thickness and load capacity

Application Guidelines:

P-Series main bearings are engineered for extreme performance applications where maximum oiling to rod bearings is critical. Use these bearings when rod bearing oil starvation is evident, typically indicated by polishing, smearing, or discoloration at the bearing center. The high eccentricity design narrows contact patterns while ensuring adequate oil supply reaches the connecting rod bearings even under severe operating conditions.

These bearings are particularly suited for engines running extremely high RPMs that cause severe rod bore distortion. The full groove design sacrifices some main bearing film thickness in favor of enhanced rod bearing lubrication, making them ideal for applications where rod bearing survival is the limiting factor.

Clevite's TriMetal construction provides the legendary durability and strength that professional engine builders depend on for racing and high-performance street applications.