We made our own bumpstop extensions for the rear (left) using some 1.75-inch, 0.120-wall DOM tubing, four plates, and two 10mm bolts. We tapped the upper spring perch with a 10mm, 1.5-pitch tap and weaseled these extensions inside the rear coil springs and threaded them in. Up front we used some 2-inch, 0.120-wall DOM and four long 8mm, 1.25-pitch bolts (right). All four spacers are about 41⁄2 inches long. The length of your bumpstop extensions will depend on shock length and the tire size you are running.