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I designed this bumper because I wanted something to match the front bumper on my Wraith and also something to protect the back of my body. To do so I designed it to sit just under the body and wrap around the sides too. It has built in shackle mounts and a hitch receiver made for ¼” aluminum square bar. It also comes with a pin for holding the hitch place, a ball mount, and a ball tongue designed for use with standard (not heavy duty) Team Associated ball studs. The ball tongue has a hole in the back end for an M3 thread.
To mount it, remove the two M3x30mm screws from the rear of the roll cage, put the bumper in place and secure with two M3x35mm screws (AXA0442 (or AXIA0442 on Amain)). They may rub on the bumper as they are going in, but they will clear. I believe that this leaves a cleaner look than if I were to notch the tube for screw clearance.