Caterpillar Cat CS Liner C15 1807351 6NZ 6NZ Skirts and Crowns Included Truck Applications IF7351/002/CS Kits 2 piece pistons: Liners, Liner O-Ring, Piston Skirt?s, Piston Crown?s Piston Pins, Piston Clips, Main Bearings, Rod Bearings, Thrust Washer, Upper Gasket Set & Oil Pan Gasket IPD Crevice Seal Cylinder Liner is included with this item.