Clevite MS-2206P-.25MM High Performance Main Bearing Set Undersize

The Clevite MS-2206P-.25MM is a high-performance main bearing set featuring P-Series construction designed for demanding racing and performance applications. This undersize bearing set (-.25MM) is engineered to provide optimal crankshaft support and oil delivery in competition engines operating at extreme RPM ranges.

P-Series Performance Design:

• Full groove design maximizes oil flow to connecting rod bearings, preventing oil starvation under high-load conditions
• High crush design ensures maximum bearing retention in the block
• Reduced overlay thickness prevents overlay fatigue and "hen tracking" in severe duty applications
• Greater eccentricity narrows bearing contact patterns and increases oiling capacity to rod bearings
• Hardened steel back construction provides added strength and resistance to fretting

Advanced Bearing Technology:

Clevite's P-Series main bearings utilize proven TriMetal construction with optimized grooving for performance engines. The upper main shells feature a 180-degree oil groove to supply connecting rods, while maintaining the thick oil film necessary for crankshaft separation. This design has been extensively tested and proven to deliver the best balance of oil delivery, load capacity, and bearing longevity.

Ideal Applications:

• Engines experiencing severe rod bearing oil starvation (indicated by polishing, smearing, or discoloration at bearing center)
• Extremely high RPM applications where rod bore close-in occurs
• Performance builds requiring increased oil flow to rod bearings
• Competition engines needing narrower main bearing contact patterns

The -.25MM undersize allows proper fitting on crankshafts that have been machined undersize for wear or performance purposes. P-Series bearings are the time-tested choice for racers who demand maximum oil delivery and proven durability in the most demanding engine applications.