Akrapovič kit "Evolution Line" 990 DUKE 24-25Optimum manifold guidance Greater performance due to special engine mapping Great sound Uncompromising race look Manufactured entirely from high grade titanium Complies with current FIM noise regulations Better response Significantly more torque Substantial weight saving Developed for use on the race track High quality look Highest quality workmanship The weight of the Akrapovi Evolution Line" exhaust system is just 4. 6 kg. Compared to the standard