Clevite MS-617P-20 High Performance Main Bearing Set

The Clevite MS-617P-20 is a high-performance main bearing set engineered for demanding racing and competition applications. This P-Series bearing set features advanced tribology design optimized for extreme RPM conditions and maximum oil delivery to connecting rod bearings.

P-Series Performance Features:

• Full groove design in upper shells maximizes oil flow to rod bearings
• High crush construction ensures maximum bearing retention under severe loads
• Reduced overlay thickness prevents overlay fatigue and hen tracking
• Hardened steel backing provides exceptional strength and fretting resistance
• Increased eccentricity narrows bearing contact patterns for optimal performance
• TriMetal construction combines durability with superior load-carrying capacity

Engineering and Design:

Clevite P-Series main bearings utilize full 360-degree grooving to address the critical challenge of rod bearing oil starvation in high-performance engines. The upper shell features optimized oil distribution channels that ensure consistent lubrication to connecting rods even under extreme conditions. The reduced overlay thickness is specifically engineered to resist fatigue cracking while maintaining excellent conformability and embeddability characteristics.

Application Guidelines:

P-Series bearings are ideal for engines experiencing extreme RPM-induced rod bore distortion, typically indicated by nearly full parting line contact patterns with standard bearings. These bearings are the preferred solution when rod bearing oil starvation is evident through surface polishing, smearing, or discoloration concentrated at the bearing's axial center. The higher eccentricity design creates narrower, more controlled contact patterns that reduce friction and improve bearing longevity in competition environments.

This bearing set is manufactured without flash plating to ensure optimal bearing-to-housing contact and proper seating. The precision-engineered chamfers provide adequate crankshaft fillet clearance while maintaining structural integrity under high-load conditions.