Clevite MS-2269P-.25MM High Performance Main Bearing Set Undersize

The Clevite MS-2269P-.25MM is a high-performance main bearing set designed for demanding racing and competition engines. This undersize bearing set (.25mm undersize on crankshaft journal diameter) features P-Series construction optimized for maximum oil flow and extreme RPM applications.

P-Series Performance Features:

• Full groove design in upper shells maximizes oil delivery to connecting rod bearings
• High crush design ensures maximum bearing retention under extreme loads
• Reduced overlay thickness prevents overlay fatigue and "hen tracking"
• Hardened steel backing provides added strength and resistance to fretting
• Increased eccentricity narrows bearing contact patterns and improves rod oiling
• Undersize .25mm (.010") for use with reground crankshafts

When to Use P-Series Main Bearings:

P-Series main bearing sets are ideal for extreme high-RPM racing engines where maximum oil flow to the connecting rod bearings is critical. The full groove design and higher eccentricity make these bearings the preferred choice when rod bearing oil starvation is a concern, typically indicated by polishing, smearing, or discoloration concentrated at the bearing's axial center. These bearings work best where severe rod bore distortion causes extreme close-in at high RPM.

Technical Specifications:

• Clevite TriMetal construction with lead-tin-copper overlay
• Steel-backed design for racing durability
• 180-degree oil groove in upper shells with full grooved design for enhanced rod oiling
• Precision manufactured to OE specifications with performance enhancements
• .25mm (.010") undersize on crankshaft journal diameter

Clevite engine bearings are trusted by professional engine builders and racing teams worldwide for their consistent quality, precise tolerances, and proven durability under the most demanding conditions.