Clevite MS-704P-10 High Performance Main Bearing Set P-Series

The Clevite MS-704P-10 is a high-performance main bearing set from the legendary P-Series line, designed for competition engines and extreme RPM applications. This bearing set features full-groove design in the upper shells to maximize oil flow to connecting rod bearings, making it ideal for engines experiencing rod bearing oil starvation.

P-Series Performance Features:

• High eccentricity design to narrow bearing contact patterns and increase rod bearing oiling
• Maximum crush for superior bearing retention in performance applications
• Reduced overlay thickness prevents overlay fatigue and "hen tracking"
• Full-grooved upper shells maximize oil delivery to connecting rods
• TriMetal construction with hardened steel backing for added strength
• Engineered for extremely high RPM applications where severe rod bore close-in occurs

When to Use P-Series Main Bearings:

P-Series main bearing sets are specifically engineered for performance engines where increased oil flow to the rod bearings is critical. Use these bearings when you're experiencing rod bearing oil starvation, typically indicated by polishing and smearing of the bearing surface with discoloration concentrated at the axial center. The higher eccentricity design creates narrower contact patterns that help prevent full parting line-to-parting line shaft contact common in extreme RPM conditions.

Technical Design:

Clevite's bearing engineering focuses on maintaining optimal oil film thickness. The 180-degree groove in the upper main shell provides the best overall design for feeding connecting rods while the ungrooved lower shell develops maximum oil film thickness for superior load capacity and bearing life. This asymmetric design ensures the loaded lower bearing surface maintains full hydrodynamic separation from the crankshaft.

The P-Series represents Clevite's oldest and most proven high-performance bearing line, trusted by engine builders for decades in the most demanding racing applications.