main bearing: 1. It is Cummins 6BT engine main bearin 2. OEM number: 3901176 main bearingRemarks: 1) We manage in auto engine valve, piston, piston ring, piston ... rod, main bearing, crankshaft bearing, connecting rod bearing, vribbed belt, belt tensioner, water pump, lubricating oil pump, engine valve seat, engine valve oil seal, engine valve guide ...