The XD516 kit is built around a set of fuel injectors and a CP4 pump that are both re-manufactured to stringent standards that meet or exceed the OE specifications. Also included is a set of fuel lines, fuel rails, and engine fuel lines. Replacing all of those components is crucial during the repair to help ensure that debris from previous failure cannot contaminate the replacement parts. Bring your Powerstroke back to life with the XDP 6.7L Powerstroke fuel contamination kit XD516 today!