i have this box on my car. the flip switch is nice. I drive around on my pump gas/meth tune. and at the flip of a switch I have my nitrous tune ready to go. the same switch arms my nitrous and loads the correct tune for it, soon as my pass is over I just flip it off and driving tune is right there.
Procharger F1X, 4L80E, E85, CBI Street Cars, DSX Tuning