Product Info: - Part: Coolant Thermostat Housing - Material: Plastic - Color: Black - Packaging Type: Box - Bolt Hole Center To Bolt Hole Center: 2.5 inches; 2.325 inches; 2.325 inches - Flange Thickness: 0.25 inches - Housing Neck Angle: 45 degrees - Inlet Port Diameter: 3 inches - Mounting Hole Diameter: 0.