Evolution Line Exhaust SystemFeatures This is a top of the range full system beautifully crafted from high grade ultra lightweight titanium It is the lightest Akrapovic complete exhaust system, weighing just 4. 4 kg which is over 57% lighter than the stock system The deep, true racing sound is perfectly tuned to match the increased performance For perfect performance, throttle response, and durability, special mapping developed by Akrapovic in collaboration with our partner Rapid