King Engine Bearings MB319AM040 Main Bearing Set Undersize - 0.040

The King Engine Bearings MB319AM040 is a complete crankshaft main bearing set engineered for Jeep Willys engines. This set is sized at 0.040" undersize, designed for use with crankshafts that have been reground to restore proper journal geometry during engine rebuilds.

King Engine Bearings are manufactured to stringent OEM and performance tolerances, making them a trusted choice among professional engine builders and rebuilders. Each bearing features King's advanced tri-metal construction for superior wear resistance, conformability, and load-bearing capacity under demanding operating conditions.

Key Features:

• Complete main bearing set for Jeep Willys engine applications
• 0.040" undersize for use with reground crankshaft journals
• Precision-engineered to OEM dimensional tolerances
• Tri-metal construction for excellent wear resistance and durability
• High-quality steel-backed babbitt or aluminum alloy bearing material
• Consistent wall thickness for proper oil clearance and film maintenance
• Manufactured under ISO quality standards

Whether you are performing a full engine rebuild or replacing worn main bearings, the King MB319AM040 delivers the precision fit and long-lasting performance that professional mechanics and engine builders rely on. Always verify crankshaft journal measurements before selecting bearing undersize.