Clevite MS-1625P High Performance Main Bearing Set

The Clevite MS-1625P is a high-performance main bearing set engineered for demanding racing and performance applications. This bearing set features optimized oil film development and grooving design to maximize both lubrication efficiency and bearing longevity under extreme operating conditions.

Advanced Bearing Design:

• Optimized 180-degree groove in upper main shell provides ideal balance of oil supply to connecting rods while maintaining maximum oil film thickness
• Ungrooved lower shells maximize load-carrying capacity and bearing life where loads are highest
• TriMetal construction with reduced overlay thickness prevents overlay fatigue and "hen tracking"
• High crush design ensures maximum retention in the housing
• Non-flash plated back promotes superior seating characteristics

P-Series Performance Features:

The MS-1625P belongs to Clevite's P-Series lineup, the company's original high-performance bearing line designed for extreme RPM applications. These bearings feature maximum eccentricity in the rod bearings and full grooving in main sets to maximize oil flow to connecting rod bearings. The hardened steel backing provides exceptional strength and resistance to fretting, while the thin overlay construction resists fatigue under high-load conditions.

Applications:

Ideal for high-RPM engines experiencing severe rod bore close-in, indicated by near full parting line contact. Use when increased oil delivery to rod bearings is critical to prevent oil starvation. Extra clearance versions available for select fitting and .001" additional clearance requirements.

Clevite bearings utilize advanced bearing science: as the crankshaft rotates, it pulls oil into the loaded bearing area, creating a protective film that keeps metal surfaces separated. The strategic grooving pattern in these bearings channels oil to critical areas while preserving oil film integrity where loads are greatest, similar to how tire treads channel water while maintaining road contact.