Well I've got a buddy that is setting ready to start doing custom tunes on cars and trucks, I asked him about diesels well long story short its going to be like a laptop tune, he showd me the settings he can change and my 01 cummins so going to be like there "test diesel" like with I belive the 01-02 cummins have the tourq management on the trans, with there tunes they can eliminate that so there is no need for the rad box. Change your fuel curves and shift points. He has been doing it with cars and I'm trying to get him in the diesel community, I'll keep updates with everyone and its all obdII. Pm or post if any questions. I'm not the turner just trying to promote a ill bit