Clevite MS-1344A-20 Engine Crankshaft Main Bearing Set

The Clevite MS-1344A-20 is a high-performance crankshaft main bearing set engineered for demanding applications. This bearing set features advanced TriMetal construction that provides exceptional strength and durability under extreme operating conditions.

Key Features:

• TriMetal bearing construction for superior strength and wear resistance
• Optimized oil groove design for maximum lubrication efficiency
• High crush design ensures excellent bearing retention
• Reduced overlay thickness prevents overlay fatigue
• Enlarged chamfers provide greater crankshaft fillet clearance
• Non-flash plated backing for improved seating characteristics

Performance Engineering:

Clevite main bearings utilize advanced grooving technology to balance oil film thickness with connecting rod lubrication. The upper main shells feature a 180-degree groove that supplies oil to connecting rods while maintaining optimal oil film pressure. Lower main shells are designed without grooves to maximize oil film thickness, providing a greater safety margin and improved bearing life under high-load conditions.

Available Series Options:

Clevite offers multiple bearing series to match specific engine requirements. P-Series bearings provide maximum eccentricity and oil flow for extreme RPM applications. H-Series bearings feature medium eccentricity with hardened steel backs, ideal for NASCAR and competition engines running medium to high RPM ranges. K-Series bearings incorporate proprietary moly/graphite TriArmor coating for enhanced protection during start-up and high-load conditions. V-Series bearings utilize lead-indium overlay for superior conformability. M-Series Micro bearings feature thick babbitt lining for exceptional conformability in engines experiencing severe crankshaft deflection.

This main bearing set is designed for professional engine builders and performance enthusiasts who demand precision-engineered components. Proper clearance checking and installation procedures are essential for optimal performance and longevity.