Clevite MS-1719P-.50MM Performance Main Bearing Set

The Clevite MS-1719P-.50MM is a high-performance main bearing set designed for demanding racing and competition engine applications. This P-Series bearing set features precision-engineered construction optimized for extreme RPM conditions and maximum oil flow to connecting rod bearings.

P-Series Performance Features:

• Maximum eccentricity design for severe rod bore close-in conditions at extremely high RPMs
• Full groove configuration to maximize oil flow to rod bearings
• High crush design for maximum bearing retention under severe loads
• Reduced overlay thickness to prevent overlay fatigue and hen tracking
• Hardened steel back construction for added strength and fretting resistance
• TriMetal bearing construction for legendary Clevite strength and durability

Technical Design:

Clevite's testing has proven that a 180-degree groove in the upper main shell provides optimal bearing performance. The upper shells retain grooving to supply oil to the connecting rods, while modern lower shells are ungrooved to maintain a thicker oil film for improved safety margin and bearing life. This design allows the shaft to hydroplane on the oil film, reducing friction and extending component longevity.

Ideal Applications:

P-Series bearings are engineered for engines experiencing extreme RPM conditions that cause severe rod bore close-in, typically indicated by nearly full parting-line-to-parting-line shaft contact. The higher eccentricity narrows bearing contact patterns and provides increased oiling to prevent rod bearing oil starvation, which manifests as polishing, smearing, and discoloration concentrated at the bearing's axial center.

Extra clearance variants are available for select fitting applications requiring an additional .001" clearance. These professional-grade bearings represent Clevite's oldest and most proven high-performance bearing series, trusted by engine builders and racing professionals worldwide.