Really, Thats kind of strange for some of the Cobra's to have HP gains , and others to not really make a difference. I've had A G-Tech for a little while now, and I've had the hardest time with it. I think the softwear needs to be updated. I actually got it from a buddy of mine at work, he has like 3 of them. The one that I'm using is not the Newest latest and greatest. It's first Gen. of last years modle. Also my Cigarette lighter is kind of wishy washy. It works when it wants to. I'll get that thing to work one way or another.