Clevite MS-2223P-.25MM Main Bearing Set Undersize Performance Engine Bearings

The Clevite MS-2223P-.25MM is a high-performance main bearing set designed for demanding engine applications. This undersize bearing set (-.25MM) provides precision fit and reliable performance for engines requiring oversized crankshaft journals.

P-Series Performance Design:

• High crush design for maximum retention in performance applications
• Full groove configuration to maximize oil flow to connecting rod bearings
• Reduced overlay thickness to prevent overlay fatigue and hen tracking
• Hardened steel back construction for added strength and fretting resistance
• Higher eccentricity to narrow bearing contact patterns and improve lubrication

Advanced Bearing Technology:

Clevite's proven TriMetal bearing construction combines a steel backing with intermediate copper-lead alloy layer and lead-tin-copper overlay. The optimized 180-degree groove in the upper shell provides ideal oil distribution to rod bearings while maintaining maximum oil film thickness in the loaded lower shell. This design reduces peak oil film pressure and minimizes horsepower loss compared to full-grooved designs.

Ideal Applications:

• High-RPM performance engines experiencing severe rod bore distortion
• Applications where rod bearing oil starvation has been an issue
• Engines requiring increased oil delivery to connecting rod bearings
• Racing and competition builds demanding maximum bearing retention

P-Series bearings are engineered for extreme conditions where standard bearings cannot provide adequate performance. The high eccentricity design prevents the parting line to parting line contact common in high-RPM applications, while the robust construction resists the forces that cause bearing movement and failure.