Akrapovic Exhaust System Kawasaki ZX-6R 2007-2008 The Akrapovic Racing System fit perfectly with the Supersport performance and styling of the Kawasaki ZX 6-R. We use the Hydroforming process to shape the header tubes for both systems, by which we ensure the optimal tube shape for the exhaust gas flow. These systems are designed for people who expect the maximum from their exhaust systems and know how to squeeze every bit of advantage out of them. Akrapovic's Racing exhaust system will certainly help you reduce lap times on the race track. Racing System uses stainless steel header tubes and link pipe Power Torque Akrapovic's exhaust system gives the ZX 6-R even more racing character. Power starts to grow significantly from 6000 rpm through midrange and overrev range, where we measured 121,5 HP at back wheel. Biggest power increase is 6.5 HP at 14280 rpm. The torque curve is increased throughout the entire rpm range and makes the bike easier to drive. Click here to view performance figures for this part NOTE Please check local laws before purchasing. Some modifications may be prohibited in some states.