I have run multiple different versions and none of them have given me a ample or noticable amount of smoke. What i resorted to was a smoke switch that basically bypasses the MAP sensor and sends a full boost reading thus overfueling. I find this advantageous because im able to run SW1 and get 24 MPG and roal a lil only when i want to. If you go to the diesel bombers website and search cummins 6.7 smoke switch click on the one titled can you smoke switch a 6.7 and everything you need is there. I have run it for almost 20K now and have had no issues with it. Hope this helps.