Clevite MS-2262P-.25MM Main Bearing Set Undersize Performance Bearings

The Clevite MS-2262P-.25MM is a high-performance main bearing set designed for demanding engine applications. This undersize (.25mm) bearing set features Clevite's proven P-Series design, specifically engineered to handle extreme RPM conditions and provide maximum oil flow to connecting rod bearings.

P-Series Performance Features:

• Full groove design in upper shells to maximize oil delivery to rod bearings
• High crush construction for maximum bearing retention and stability
• Reduced overlay thickness to prevent overlay fatigue (hen tracking)
• Greater eccentricity to narrow bearing contact patterns and improve oiling
• Hardened steel backing for added strength and fretting resistance
• TriMetal construction for exceptional durability under high loads

Ideal Applications:

P-Series main bearings are recommended for performance engines experiencing rod bearing oil starvation, indicated by polished or smeared bearing surfaces with discoloration at the axial center. The full groove design ensures adequate oil supply to connecting rod bearings in high-RPM applications. These bearings work best where higher eccentricity is desired to manage bearing contact patterns effectively.

Advanced Bearing Technology:

Clevite's main bearing design utilizes optimized 180-degree grooving in the upper shell, which engineering studies have proven provides the best overall performance. This configuration maintains a thick oil film for the crankshaft to ride on while efficiently feeding oil to the connecting rods. The lower shells remain ungrooved to maximize oil film thickness and bearing longevity under load.

This bearing set represents decades of Clevite engineering expertise, offering professional-grade performance for racing and high-output street engines. The .25mm undersize dimension accommodates crankshafts that have been machined for bearing clearance adjustment or journal repair.