Very easy to install. 1 hole lined up w/ the factory shock mount hole, the other 2 I drilled out to 7/16". I mounted them in such a way to allow the maximum possible suspension compression on the up stroke, and nothing more. The rest is all droop I removed the inner fender well for ease of install. They won't fit w/ factory fenders, but what I did was cut a notch into them for the shock towers to fit, and then reinstalled them.