Akrapovic BMW K 1600 GT/GTL SLIP-ON Street Legal Exhaust  Ride in style with the Akrapovič Slip-On exhaust system for this top-of-the-line BMW touring motorcycle. You will recognize this street-legal system by its unique design, which is outstandingly executed using top-quality materials such as titanium and carbon fiber for the outlet caps and outer sleeves of both mufflers. In order to make long trips enjoyable sound experiences as well, Akrapovič engineers have introduced further sound enhancements to this fine six-valve engine with this Slip-On system.    Performance   Akrapovič Slip-On system specifications for the BMW K 1600 GT/GTL (with muffler insert):  Power & Torque: The Akrapovič Slip-On exhaust system increases engine power and torque at practically every rpm. Maximum power of 144 HP is reached at 6900 rpm. The greatest power gain is 2 HP at 5870 rpm.