Caterpillar Cat C12 BDL1-UP Straight Head Gasket IF2948/042STR Truck Applications 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