2011-13. 4.0 LITER. AIR PUMP AND RELATED COMPONENTS. A threaded rod with a drive head (such as hex, 12 point, torx, etc.) on one end used to secure the Skid Plate to it's mounting point. Engine Coolant Thermostat Housing Bolt. Engine Water Pump Bolt. Hardware to attach the heat Shield to the catalytic converter. Flange. Catalytic Converter Heat. Cover. Engine Coolant Thermostat Housing. Pipe. Powertrain Skid Plate. Screw. Thermostat hsng. Water Pump. Included with: Water Pump assembly.