Akrapovic BMW S 1000 R / M 1000 R 21-26 Slip-On Line Exhaust (Carbon Fibre) - S-B10SO16-HZCThis updated design uses race proven materials in the construction of the system, with a high grade lightweight titanium link pipe, titanium inner muffler structure, and new style of end cap all matched to a carbon fibre outer muffler sleeve, which has created an exhaust that is over 23% lighter than the standard stock version. A full and intense sound is emitted when the machine is idling, offering a deep, full tone with a distinctive Akrapovic