Greetings Tom, Just wondering how your work came out. I have an S4 and presently facing the same issue. My thought is to take two 5/8ths threaded rods and join them with a long-nut at the center. The ends would be where the suspension arm and frame attach. The extended bolt assembly would rest in the recess of the trunk floor, where the heads of the bolts are presently. This method would strengthen and also add some rigidity to the rear end of the car. Anyway, let me know if you can. Jeff Jeff.Butzer@gmail.com
