Replace the failed water pump in your Dodge Ram 5.9/6.7 diesel with the XDP XTRA Cool Water Pump XD672. This water pump is a direct-fit replacement that's manufactured to meet the factory specifications providing you with a perfect fit, finish, and function. Each unit includes a new o-ring and comes ready for installation. If shopping by OEM cross reference numbers, there are many water pumps that cover the 5.9L and 6.7L engines and many versions that have been superseded over the years. This water pump has the 82mm iron impeller which is an upgrade over the plastic impeller that was originally equipped on many models. Features: High-Quality MaterialsDirect-Fit ReplacementIncludes Mounting O-RingSpecifications:Fan Clutch Included: NoHousing Material: Grey IronHub Height Inch: 3.861Impeller Material: Grey IronImpeller Rotation: ReverseImpeller Vane Quantity: 7Includes Back Housing: NoInstallation Warnings: NoMounting Hardware Included: NoMounting Hole Quantity: 2Pulley Diameter: 88mm