Clevite MS-1157A-30 Engine Crankshaft Main Bearing Set

The Clevite MS-1157A-30 is a precision-engineered crankshaft main bearing set designed to deliver exceptional durability and performance in demanding engine applications. This complete bearing set provides the critical interface between the crankshaft and engine block, ensuring smooth rotation and reliable operation.

Advanced Bi-Metal Construction:

• 100% lead-free aluminum silicon alloy composition for environmentally responsible performance
• Engineered with 60% more silicon content than competitive replacements for superior material properties
• Enhanced journal surface conditioning capability reduces wear and extends service life
• Exceptional seizure resistance protects against bearing failure under high-load conditions
• Improved wear resistance maintains proper oil clearances throughout the bearing's service life

Clevite bearings continue a long-standing tradition of quality and reliability in the engine rebuilding industry. The bi-metal aluminum construction combines the benefits of a steel backing with an advanced aluminum silicon bearing surface, delivering the optimal balance of strength, conformability, and wear resistance for professional rebuilds and performance applications.