Slip-Ons represent the first step in the exhaust system tuning process, and they offer a great balance between price and performance. Change the nature of your bike by adding more power, improved performance, and the unique Akrapovic sound. Everything packed in stylishly designed Slip-On exhaust systems. The GP-styled Slip-On Line system is a high-performance system for race-oriented riders. Made from titanium, a race-proven material. The exhaust system modification results in a boost in performance and noticeable weight reduction.