Like said, unless you are able to duplicate the force of air while driving 70mph, you wont see 30hp on a dyno. The performance gains have been documented many times at the dragstrip with most trucks dropping .2-.4 off their 1/4 mile times depending on weather. That kind of gain at the track is equivalent of a 30hp increase. Vararam is so confident of this that they even offer a no questions asked guarantee. In the past year, we have sold upwards of 200 Vararam units, and only 2 have come back because customers said they didn't feel the difference. Both of these were also returned in the heat of summer where no cold air intake is going to perform to its full potential. Even with the Vararam forcing in ambient air, that air is still 95-100* here in the south. This intake, in the cooler months to come, is going to show some great gains for those of you that are running 1.