The bumpstop kit welds into place right above the coil spring and in the place of the original rubber bumpstop and its supporting structure. To get to all this, you must first support the vehicle and remove the coil springs. You might as well take out the factory air intake box and move the coolant overflow bottle (depending on what year) as well, since they sit over the points in the body that you'll be cutting and welding on later. Also realize that you might have to modify the placement of these items depending on your installation job. Once we had these parts removed, head fabber Big Steve Wilson took special care to grab a Sawzall and hack off the original bumpstops.