Clevite MS-2242P-.25MM High Performance Main Bearing Set Undersize

The Clevite MS-2242P-.25MM is a high-performance engine crankshaft main bearing set designed for demanding applications. This P-Series bearing set features 0.25mm undersize dimensions for use with reground crankshafts, providing the precision fit required for rebuilt performance engines.

P-Series Performance Features:

• Full groove design in upper shells maximizes oil flow to connecting rod bearings
• High crush construction ensures maximum bearing retention in the housing
• Reduced overlay thickness prevents overlay fatigue and "hen tracking"
• Hardened steel back construction for added strength and resistance to fretting
• Greater eccentricity narrows bearing contact patterns for optimal performance
• TriMetal construction provides legendary Clevite strength and durability

Advanced Bearing Technology:

This bearing set features Clevite's proven 180-degree groove design in the upper main shells, which extensive testing has shown provides the best overall performance for high-performance engines. The ungrooved lower shells maintain a thicker oil film for improved load capacity and bearing life. This asymmetric design delivers optimal oil supply to rod bearings while maximizing the safety margin on the heavily loaded lower bearing surfaces.

Ideal Applications:

P-Series main bearings are specifically engineered for engines experiencing extremely high RPMs that cause severe rod bore distortion. These bearings excel when rod bearing oil starvation is a concern, indicated by surface polishing, smearing, or discoloration concentrated at the axial center. The increased oil delivery capability makes P-Series ideal for racing engines, high-performance street applications, and any build requiring maximum oiling to the connecting rods.

This 0.25mm undersize set is precision-manufactured to accommodate crankshafts that have been ground 0.25mm under standard journal diameter, ensuring proper bearing clearances are maintained after crankshaft machining.