4.6 LITER. Thermostat outlt bolt. All Required. Bolt for Cylinder Head. Bolt used to fasten The Engine Intake Manifold. Engine Coolant Thermostat Housing Bolt. Engine Oil Filter Adapter Bolt. Lower Intake Manifold to Head. and Washer Assembly. and Washer Assembly - Hex. Head. Coolant Housing. Cylinder Head. hsng screw. Intake Manifold. Oil Filter Adapter. outlt. Inlet screw. Oil pan. Included with: Thermostat Housing, Thermostat unit, Water Manifold.