Akrapovic Kawasaki ZX-6R EVO Conical Exhaust 2009. Akrapovic Evolution system is designed for racing-oriented riders who demand maximum performance. It features exceptional production quality, hi-tech materials and of course increased engine performance. Quality and reputation is further augmented by the use of the high-tech HYDROFORMING production process to form the header tubes. Beside performance you will also benefit from great weight savings, up to 7.51 kg if compared to stock system. The change will be also visual as our conical muffler perfectly fit the exterior line of the Ninja and add a clean racing image. Evolution system is made entirely of our exclusive high grade titanium. System is not street legal and is developed only for race track use.