Clevite MS-2007A-.25MM High Performance Main Bearing Set Oversize

The Clevite MS-2007A-.25MM is a high-performance engine crankshaft main bearing set designed for demanding automotive applications. This precision-engineered bearing set features .25mm (.010") oversize dimensions to accommodate machined crankshafts, providing the critical oil film separation needed for reliable engine performance.

Advanced Bearing Design:

Clevite main bearings utilize optimized grooving patterns to balance lubrication delivery with maximum load capacity. The upper main shells feature a 180-degree groove design that efficiently supplies oil to connecting rod bearings while maintaining optimal film thickness. Lower main shells are ungrooved to provide maximum load-bearing surface area and thicker oil films for improved safety margins and extended bearing life.

Key Features:

• TriMetal construction with hardened steel backing for superior strength
• Optimized 180-degree upper shell grooving for efficient rod bearing lubrication
• Ungrooved lower shells for maximum load capacity and oil film development
• High crush design ensures positive retention in the bearing bore
• Reduced overlay thickness prevents overlay fatigue and "hen tracking"
• .25mm (.010") oversize for machined crankshafts
• Precision-manufactured to OEM specifications and tolerances

Performance Series Applications:

Clevite offers multiple bearing series to meet specific performance requirements. P-Series bearings feature maximum eccentricity and full grooving for high-RPM applications where extreme rod bore deformation occurs. H-Series bearings provide medium eccentricity with enlarged chamfers for oversize crankshaft fillets, making them ideal for medium to high-RPM engines. V-Series bearings utilize lead-indium overlay for enhanced conformability. M-Series micro bearings feature thick babbitt linings for severe crankshaft deflection conditions. K-Series bearings incorporate TriArmor moly/graphite surface treatment for additional wear protection.

This main bearing set delivers the precision fitment and durability required for performance builds, engine rebuilds, and racing applications where bearing reliability is critical.