I have a Strömung SS Dual Tip cat-back exhaust but it weighs a quite a bit more than the stock set-up. The poor thing would sway and knock and was pretty nasty over bumps. These new hangers are much stiffer than the stock rubber hangers. The exhaust barely moves now, no more knockin', no more swingin'. For the $40 they cost, they are a nice detail to keep things tight and noise free.