i bought the bd rad box hoping to feel a difference on the bottom end. i will be honest though i was not expecting a whole lot just because its not really a popular box talked about here. well the truck didnt shoot me through the sky but wow, what a difference the way it takes off nowOo. . it feels as if the truck is set free with out being held back in the low rpms of 1st and 2nd gear. now i can feel the drag comp work from 0-? mph. no hesitation. it just takes off through the gears. oh and all the gauges work but the rpm tach.