Akrapovic BMW BMW K 1300 R Slip-On Exhaust 2009-2010. The dynamic roadster offers a great tuning platform for motorcyclists who desire something special. Our sporty and lightweight SLIP-ON system offers a great balance between price and performance and represents the first step in the exhaust system tuning process. The change will be also visual as our conical shaped muffler with carbon-fiber end cap perfectly fit the exterior line of the BMW and add a clean racing image  The muffler outer sleeve is made of our exclusive high temperature and stress resistant titanium, which gives a special hi-tech touch to our SLIP-ON street legal system.         Performance     Measurements of the Akrapovic SLIP-ON STREET LEGAL system on the BMW K1300R (without muffler insert):     Power & Torque: the exhaust system modification with the SLIP-ON OPEN system results in a major boost in performance, delivering a massive 163.4 HP at 9750 rpm on back wheel. But the increased power isn?t available just at the top of the range; the system shows its quality already from 4000 rpm up through entire rpm range. Max. increased power between the Akrapovic and the stock system is 4.4 HP at 9750 rpm. Besides this, the torque is substantially higher in a lower rpm area at 3500 rpm and from middle to high rpm area.