I red a thraed last week about the design falws of the emission controlls. the author pointed out the problem of introducing a water coold system and the problems related to it, he compared it to a ford system. I can't find it, but I know its here someware. My system doesn't work and my turbo is caked with carbon after 4 trips to the service department. the author sounded like he knew what he was talking about.have an 07-6.7 Cunnins