Akrapovic Yamaha XT1200Z Slip-On Exhaust The Akrapovic Slip-On is an excellent choice for riders who do not wish to make excessive modifications to their bikes. It is an easy-to-install base level exhaust system component, and an excellent combination of production quality, performance, affordability and visual enhancement. The striking muffler with titanium muffler outer sleeve and carbon fiber outlet cap perfectly complements the lines of the bike. The Slip-On system is legal for street use.   Performance   Measurements of the Akrapovic SLIP-ON STREET LEGAL exhaust system on the YAMAHA XT1200Z Super T�n�r� (with muffler insert):  Power & Torque: the Akrapovic SLIP-ON STREET LEGAL EXHAUST SYSTEM radically changes this bike?s performance. The increase begins at the low end, and keeps on growing right to the top of the range. Max. increased power of 3.4 HP is recorded at 6130 rpm. The increased power is available just at the right moment as the system shows its quality already from 2000 rpm up to 7300 rpm. The torque curve also gets a major boost, indicating the system?s exceptional synergetic effects on the engine