Literally took them out of the box and slapped them on. No changes no adjustments, all the hardware was tight and ready to go. Pre set height was perfect for me. I appreciate a product that arrives ready to go, it inspires allot of confidence. Also I was worried the spring rate would be to aggressive for a street car, but I have no complaints so far, I'll try to do an update in a few months but if I don't, it'll be because I've completely forgot about them because they're working perfectly for my tastes.