Clevite MS-590A-20 High Performance Main Bearing Set

The Clevite MS-590A-20 is a precision-engineered main bearing set designed for high-performance and racing applications. This bearing set features advanced tri-metal construction that provides exceptional strength, durability, and wear resistance under extreme operating conditions.

Key Features:

• Tri-metal bearing construction for superior strength and longevity
• Optimized 180-degree upper shell grooving for efficient oil distribution to connecting rods
• Ungrooved lower shells to maximize oil film thickness and bearing life
• High crush design for maximum bearing retention
• Reduced overlay thickness to prevent overlay fatigue
• Enlarged chamfers for increased crankshaft fillet clearance
• Non-flash plated back for improved bearing seating

Engineering Excellence:

Clevite's main bearing design philosophy centers on maintaining optimal oil film thickness while ensuring adequate lubrication to connecting rod bearings. The upper shell features a precision 180-degree oil groove that effectively feeds oil to the connecting rods while maintaining maximum load-carrying capacity. The ungrooved lower shells operate under higher loads and benefit from uninterrupted oil film development, resulting in improved bearing performance and extended service life.

Performance Applications:

This main bearing set is ideal for medium to high RPM performance engines, circle track racing, road racing, and other demanding applications where reliability and consistent performance are critical. The bearing's medium eccentricity provides optimal contact patterns covering approximately two-thirds to three-quarters of the bearing surface, ensuring proper load distribution and heat dissipation.

Clevite performance bearings are manufactured to exacting tolerances and undergo rigorous quality control to ensure they meet the demanding requirements of professional engine builders and serious enthusiasts. Whether you're building a competition engine or a high-performance street motor, the MS-590A-20 main bearing set delivers the reliability and performance you need.