Clevite MS-1719P-.25MM Performance Main Bearing Set Undersize

The Clevite MS-1719P-.25MM is a high-performance main bearing set designed for demanding racing and performance engine applications. This P-Series bearing set features -.25MM undersize dimensions for use with reground crankshafts.

P-Series Performance Design:

• Full groove configuration in upper shells to maximize oil flow to connecting rod bearings
• High crush design for maximum bearing retention under extreme conditions
• Reduced overlay thickness to prevent overlay fatigue and hen tracking
• Hardened steel backing for added strength and resistance to fretting
• High eccentricity design to narrow bearing contact patterns and improve oiling

Advanced Bearing Technology:

Clevite's tri-metal construction provides superior strength and durability. The upper main shells feature a 180-degree oil groove optimized for connecting rod lubrication while maintaining maximum oil film thickness. Lower shells are ungrooved to develop the thickest possible oil film for improved safety margin and bearing life.

Ideal Applications:

P-Series main bearings are the optimal choice when higher eccentricity is needed to narrow bearing contact patterns or when rod bearing oil starvation is a concern. These bearings excel in extreme RPM applications where rod bore close-in causes severe loading. They're particularly effective for engines experiencing rod bearing polishing, smearing, or discoloration concentrated at the axial center of the bearings.

Clevite P-Series bearings represent decades of proven performance in professional racing and high-performance street applications, offering the reliability demanded by engine builders worldwide.