The dynamic, bold looking roadster offers a great tuning platform for motorcyclists who desire something special. Our sporty and lightweight SLIP-ON systems offer a great balance between price and performance and represent the first step in the exhaust system tuning process.  The muffler outer sleeve is made of titanium or carbon-fiber, which gives a special hi-tech touch to our SLIP-ON system. We also offer an open and a street legal version.      Performance   Measurements of the Akrapovic SLIP-ON street legal system on the Kawasaki Z 1000 (with noise damper):  The Akrapovic SLIP-ON system will deliver a big power and torque increase from a simple modification. Power output is smoother over the entire rpm range. We measured a max. power increase of 3.7 HP at 10200 rpm. The torque is increased over the entire rpm range, which is exceptionally useful for more comfortable and smooth riding. With our SLIP-ON systems you will also save more than 4 kg in comparison with the stock mufflers.