first id reccommend taking the heat shroud off cuz that could be vibrating. also, from the pictures, it looks like ur muffler section is upside down. my n1 hung down not up, by that i mean the hangers should go from the rubber pieces down to the muffler, not up to the muffler. try to rotate it around. also, ur last missing rubber piece should be on the right side of the muffler. it seems u are missing that.