Clevite MS-1344P High Performance Engine Crankshaft Main Bearing Set

The Clevite MS-1344P is a high-performance engine crankshaft main bearing set engineered for demanding applications. This precision-manufactured bearing set features Clevite's proven TriMetal construction, designed to provide superior durability and reliability in performance and racing engines.

Understanding Main Bearing Grooving Technology:

Clevite's engineering research demonstrates that a 180-degree groove in the upper main shell provides optimal bearing performance. This design maximizes oil film thickness on the lower bearing shell while efficiently delivering oil to connecting rod bearings. The ungrooved lower shell maintains the thickest possible oil film for superior load capacity and extended bearing life.

P-Series Performance Features:

• Full groove design maximizes oil flow to rod bearings
• High crush construction ensures maximum bearing retention
• Reduced overlay thickness prevents overlay fatigue and hen tracking
• Hardened steel backing on rod bearings for added strength and fretting resistance
• High eccentricity design narrows bearing contact patterns
• Optimized for extreme high-RPM applications

Additional Clevite Performance Series Available:

Clevite offers multiple bearing series to match specific engine requirements. H-Series bearings feature medium eccentricity with enlarged chamfers for oversize crankshaft fillets, ideal for NASCAR and medium-to-high RPM applications. K-Series bearings incorporate proprietary moly/graphite TriArmor coating for exceptional protection under high loads and temperatures. V-Series bearings utilize lead-indium overlay for superior conformability, while M-Series "Micro" bearings feature thick babbitt lining for maximum conformability in engines experiencing severe crankshaft deflection.

Application Guidance:

Use P-Series main bearings where increased oil delivery to rod bearings is critical, or when rod bearing oil starvation is indicated by surface polishing, smearing, or discoloration at the bearing's axial center. These bearings are specifically designed for extreme high-RPM conditions that cause severe rod bore close-in, typically shown by nearly full parting line contact.

This main bearing set represents Clevite's decades of bearing engineering expertise, delivering the performance and reliability demanded by professional engine builders and serious racers.