Titanium made link pipe for low installed muffler of exhaust system The low-positioned slip-on with link pipe can only be mounted if the pillion passenger frame is removed An additional aluminium muffler holder from accessories range (product code 77 11 8 564 071) must be mounted, and covers for the main frame's threaded fasteners (product code 77 25 8 536 857) are also recommended to hide the unattractive screw connections on the main frame .