Ok basically I was wondering if anyone had any problems with these springs, http://www.americanmuscle.com/sr-springs-0513gt.html. The fronts went on no problem, and so did the rears but now while riding around, when I hit a big bump or go over a speed bump, I hear this god awful smacking, like its bottoming out. Its not that low, its only on a 1.5 inch drop. My question is, has anyone else had this problem? I shouldn't need aftermarket shocks I've been told, and there was nothing else needed for the install for them to fit on 2011+ mustangs, despite what the website says about the strut mounts and dampers . Any help would be greatly appreciated. Ill put up pic later!