Clevite MS-540P-30 P-Series High Performance Main Bearing Set

The Clevite MS-540P-30 is a high-performance P-Series main bearing set engineered for demanding racing and performance applications. This bearing set features full 360-degree grooving in the upper shells to maximize oil flow to connecting rod bearings, making it ideal for engines where rod bearing oil starvation is a concern.

Key Features:

• TriMetal construction with hardened steel backing for maximum strength and durability
• High crush design ensures superior bearing retention under extreme conditions
• Reduced overlay thickness prevents overlay fatigue and "hen tracking"
• Full 360-degree grooving optimizes oil delivery to rod bearings
• Higher eccentricity design narrows bearing contact patterns and improves oiling
• Engineered without flash plating for improved bearing seating

Application Guidelines:

P-Series main bearings are recommended when higher eccentricity is needed to narrow bearing contact patterns and provide increased oil flow to connecting rod bearings. Use these bearings in extremely high-RPM applications where severe rod bore close-in occurs, typically indicated by nearly full parting line to parting line shaft contact. Rod bearing oil starvation—shown by polishing, smearing, or discoloration concentrated at the bearing's axial center—is a clear indicator that P-Series bearings with enhanced oiling capability are needed.

Technical Specifications:

These bearings utilize Clevite's proven TriMetal bearing construction with a hardened steel back for added strength and resistance to fretting. The reduced overlay thickness is specifically engineered to withstand the demands of high-performance and racing engines while preventing premature bearing failure. The full-grooved design ensures consistent oil supply to critical engine components even under the most demanding operating conditions.