Clevite MS-2042P-.25MM High Performance Main Bearing Set

The Clevite MS-2042P-.25MM is a high-performance engine crankshaft main bearing set featuring .25mm undersize dimensions for precision machined crankshafts. This P-Series bearing set is engineered specifically for demanding performance and racing applications where maximum oil flow and superior bearing retention are critical.

P-Series Performance Design:

• Full groove configuration 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 back construction provides added strength and fretting resistance
• Higher eccentricity narrows bearing contact patterns for optimal performance
• .25mm undersize for crankshafts machined .010" (0.25mm) undersize

Advanced Bearing Technology:

Clevite P-Series main bearings utilize proven TriMetal construction with optimized 180-degree grooving in the upper shell. This design delivers the best balance of oil film strength and connecting rod lubrication. The upper bearing groove supplies critical oil to the rods while the ungrooved lower shell maintains maximum oil film thickness for superior load capacity and bearing life.

Ideal Applications:

• Engines operating at extremely high RPM where severe rod bore distortion occurs
• Racing applications requiring maximum oil flow to prevent rod bearing starvation
• Situations where polishing, smearing, or discoloration indicates inadequate rod oiling
• Performance builds using crankshafts ground .25mm (.010") undersize

P-Series bearings represent Clevite's original high-performance bearing line, developed through extensive testing to provide the durability and oiling characteristics demanded by professional engine builders and racers. Each bearing is manufactured without flash plating for superior seating characteristics and consistent performance.