Clevite MS757A20 Tri-Metal Main Bearing Set 0.020 in. Undersize

The Clevite MS757A20 is a complete crankshaft main bearing set ground to 0.020 in. undersize, designed for engine rebuilds where the crankshaft journals have been reground to restore proper clearances. Part of the trusted Clevite 77 precision bearing family, these main bearings are engineered to meet or exceed OEM standards for fit, finish, and durability.

Key Features:

• Tri-Metal construction — combines a steel backing for structural support, a copper-lead alloy intermediate layer for load capacity, and an electroplated Babbitt overlay for excellent surface conformability and break-in characteristics
• 0.020 in. undersize — engineered for crankshafts that have been reground 0.020 in. under standard journal diameter
• Precision wall thickness tolerances — ensures consistent oil clearance and proper bearing crush upon installation
• High crush design — promotes secure bearing retention within the housing bore
• Sold as a complete main bearing set

Installation Notes: All bearing surfaces and housing bores must be thoroughly cleaned prior to installation. Verify oil clearances using Plastigauge or a micrometer before final assembly. Torque main caps to the manufacturer's specified sequence and values.

Clevite 77 engine bearings have set the standard in the precision bearing industry and are trusted by professional engine builders for street, performance, and racing applications alike.