The XDP X-TRA Cool Water Pump XD669 will replace the failed or leaking water pump on your Ford 6.4 Powerstroke. This water pump is manufactured to meet the factory specifications to provide you with a perfect fit, finish, and function. Each unit comes with a new o-ring and is ready for installation.Features: High-Quality MaterialsDirect-Fit ReplacementIncludes Mounting O-Ring2 Year/Unlimited MileageSpecs: Housing Material: AluminumHub Height: 3.898 InchHub Hole Quantity: 4Impeller Material: IronImpeller Rotation: StandardImpeller Vane Quantity: 8Mounting Hole Quantity: 5