The Black Maxx race tuner is part of the next generation of diesel downloadersfrom H&S Performance that offer everything a diesel owner could want, all in one high tech unit. Exclusive to H&S Performance, the Black Maxx offers the flexibility of shift-on-the-fly tuning, as well as giving you the ability to monitor vital engine statistics at a glance. The full color, high resolution screen allows the user to view up to four parameters at one time. Choose from 20+ engine parameters including boost, transmission temp, intake temp, fuel rail pressure, exhaust gas temps, plus many more (varies depending on application). The Black Maxx comes loaded with 3 power levels that can be changed at any time, on the fly, and is sure to leave the competition in the dust. When you are ready to step up to the next level of performance, step up to the Black Maxx !