Clevite MS-704P-20 High Performance Main Bearing Set

The Clevite MS-704P-20 is a high-performance P-Series main bearing set engineered for demanding racing and performance engine applications. This bearing set features full grooving to maximize oil flow to connecting rod bearings, making it ideal for engines requiring enhanced lubrication under extreme conditions.

P-Series Performance Features:

• Full grooved design maximizes oil delivery to rod bearings
• High crush design for maximum bearing retention
• Reduced overlay thickness prevents overlay fatigue and hen tracking
• Hardened steel back construction for added strength and fretting resistance
• Greater eccentricity to narrow bearing contact patterns and increase rod oiling
• Tri-Metal construction for strength and durability

When to Use P-Series Main Bearings:

P-Series main bearings are recommended when higher eccentricity is desired to narrow bearing contact patterns and provide increased oil flow to rod bearings. These bearings are particularly effective in addressing rod bearing oil starvation, which typically shows as surface polishing, smearing, and discoloration concentrated at the bearing's axial center. The full groove design ensures consistent oil supply even under the most demanding high-RPM racing conditions.

Technical Design:

Clevite engineers have extensively tested main bearing groove configurations to optimize performance. The P-Series features strategic grooving that balances oil film strength with adequate rod lubrication. The reduced overlay thickness specifically addresses the durability requirements of competition engines while maintaining the conformability needed for reliable operation.

This bearing set represents Clevite's original high-performance series with proven performance across decades of racing applications. The unique core part numbers distinguish these from standard passenger car bearings, ensuring you receive components specifically engineered for performance use.