yeah this was a big contraversey about 2 years ago with them. I run their weight jacker lowers along with their double adjustable uppers. If I had to do it again, i would spend the extra money and get wolfe racecraft, Team Z, or the Steeda's. Yes, they all cost about double, but it will be the last set you ever buy. Mine are doing good for me but i havent had the chance to really launch on them good. Hope they dont break like the others i have seen. Do it once and do it right!!! You get what you pay for!!