*Please compare the plug with your old part and make sure it's the same before purchasing

Engine number: Perkins 404C-22T

PC120 Excavator

Logger 322C

4TN78L 4TN78TL-RB Overhaul Rebuild Kit Yanmar Engine YB451 YB501 Excavator Con rod bearing size:+0.5mm *Please compare the plug with4TN78L 4TN78TL RB Overhaul Rebuild Kit Yanmar Engine YB451 YB501 Excavator Condition: new, aftermarket Application: Models with Yanmar 4TN78L 4TN78TL RB Engine Compatible with Yanmar YB451 YB501 Excavator This kit includes: 1 Set of Overhaul Gasket Kit 4 Cylinder Liners 4 Pistons STD 4 Piston Pins 8 Snap Rings 4 Rod Bushings 1 Set of piston rings 1 Set of Main Bearings 1 Set of Rod Bearings 1 Set of Thrust Bearings 4 Intake Valves 4 Exhaust Valves 8