Hey guyz, I have a quick question. I have 2 sets of springs for my ef-9. One is eibach sportlines which I bought last year, and another is suspension techniques. Which one has stiffer spring rates? now the ride height for both of them are slightly the same except the sportlines drop 1/4 an inch more. Now here my situation, if I use the rear springs from eibach in front ... will it lower the front more? and if i use rear springs all around my car... would there be that much of a difference in performance?