Clevite MS-1454P-40 High Performance Main Bearing Set P-Series

The Clevite MS-1454P-40 is a high-performance main bearing set engineered for demanding racing and competition applications. This P-Series bearing set features maximum oil flow design with full grooving to ensure optimal lubrication to connecting rod bearings under extreme operating conditions.

P-Series Performance Features:

• Full grooved design maximizes oil flow to rod bearings
• High eccentricity construction narrows bearing contact patterns for improved performance
• High crush design ensures maximum retention in the engine block
• Reduced overlay thickness prevents overlay fatigue and "hen tracking"
• Hardened steel back construction provides added strength and fretting resistance
• Designed for extremely high RPM applications where severe rod bore close-in occurs

Advanced Bearing Technology:

Clevite's tri-metal bearing construction combines a hardened steel backing with a high-strength intermediate layer and a precision overlay surface. The P-Series features a 180-degree groove in the upper main shell, which engineering studies have proven provides the best overall performance by maintaining optimal oil film thickness while still supplying adequate oil to the connecting rods. The ungrooved lower shell develops a thicker oil film for the crankshaft to ride on, providing greater safety margin and improved bearing life compared to fully grooved designs.

Ideal Applications:

Use this P-Series main bearing set when higher eccentricity is desired to narrow bearing contact patterns and provide increased oiling to rod bearings. These bearings are specifically engineered for extreme RPM ranges where rod bearing oil starvation might otherwise occur, typically indicated by polishing and smearing of bearing surfaces. The P-Series design addresses these challenges through optimized oil delivery and advanced bearing geometry.

This bearing set represents Clevite's original high-performance series with proven reliability in racing and competition engines. Regular inspection is recommended in severe-duty applications to ensure optimal performance and longevity.