Caterpillar Cat 3126 6PZ 8SZ 9SZ 7AS 3 valve Truck IF4621/22 IF4621/22 Truck Applications Kits 2 piece pistons: Piston Skirt?s, Piston Crown?s Piston Pins, Piston Clips, Main Bearings, Rod Bearings, Thrust Washer, Upper Gasket Set & Oil Pan Gasket (Repair Sleeve?s are available for purchase)