Optional available headers from the finest titanium offer an upgrade to a full system when used with the Akrapovic Slip-On exhaust system. Let your bike stand out with more power, beautiful design, and the unique Akrapovic sound. EC/ECE type approved, with integrated catalytic converter. Featuring exhaust valve for improved rideability in lower rpm.Optional headers fit also with Akrapovic standard (first fit) / BMW accessory Akrapovic silencer.