My 2 cents is this is crap. I have seen tons of tuners like this and unless you know what you are doing you can really damage your engine with this. In almost all of these cheap units there are no safegaurds on them so you can go to far on your fuel curve and blow your engine. If you want a piggyback tuner then invevst in a Greddy AVCR or somethibg like that, much better unit and far safer.;Dr;