I just looked at them on Summit, not shipping until mid-August. I purchased a set similar to the Summit ones from a website and they really did nothing by looking at the truck height. I previously had a set of cheap aftermarket shackles that did more to lower the truck. I don`t want to do an axle flip as I bracket race the truck , I thought about doing the front spring hanger flip but my gas tank is very close to the front spring hanger to do this modification. I am thinking of just putting the cheap shackles back in as they seemed to work better.