Use the HD Clamps to finish the custom piping on your 4BT 3.9L Diesel. You'll find the ideal clamp you need as they offer up to 12 degrees of radial, angular, and axial movement while holding pressure. With the ability to handle temperatures up to 400 degrees Fahrenheit and aluminum construction, these units can handle the harshest conditions. XDP carries top manufacturers such as Vibrant Performance and Mishimoto among many others.