1. It is Cummins 6BT engine main bearin 2. OEM number: 3901091 3. Competitive ... , camshaft, cylinder head, cylinder block, connecting rod, main bearing, crankshaft bearing, connecting rod bearing, vribbed belt, belt tensioner, water pump, lubricating oil pump ... , Japan, Middle East, Africa and Southeast Asia. Desire our cooperation! Cummins 6BT5.9 Main Bearing 3901091