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Today installed the DX cat back extension along with a DC sport twin canister EX system. Everything attached well but the rubber suspension/attachment along with the motor mount softness has cause so much movement in the exhaust system that at times the sysems rubs the underside of the chassis. Does anyone supply firmer hangers so there would be greater resistence to this excessive movement. I wonder whether the DX hangers are so soft for the very light standard system that something heavier is too much for it. I have begun to look at the motor mounts and the engine tensioner decribed elsewhere but stiffer hangers likely would help at a less costly fix. Any suggestions. Thanks