My Fiberfab Californian had less than 200 miles on it since it was built in 2006. It had not shown any signs of the common butt sag but I asked Carey of Special Edition to come up with a way to strengthen the rear support of my car while he had it in for the Subaru conversion. His approach is somewhat different but I am confident in the results. He took 2" X 1" steel channels and welded them to the frame posts behind the doors. He then glassed and riveted them to the inner walls.
