Unlimited Diesel Coolant Filter Kit With Shutoff ValvesA bypass coolant filter will prolong the oil cooler life in your 6. 0L, 6. 4L, or 6. 7L Powerstroke by removing debris from the coolant that would normally plug the oil cooler. We recommend changing the coolant filter after 500 1000 miles initially, and then every other oil change thereafter. *Shutoff valves included Product may vary from image depending on engine model. 6. 0L kit shown.