ENGINE REBUILD KIT MITSUBISHI K4N DI ENGINE AFTERMARKET PARTS DIESEL ENGINE PARTS BUY PARTSMitsubishi K4N Engine Rebuilt Kit for 305CR CX45 EC45 2290cc Excavator Tractor. Mitsubishi K4N Engine Rebuilt Kit for 305CR CX45 EC45 2290cc Excavator Tractor. Mini Hydraulic Excavator and Compact Tractor.