This exhaust is constructed from high-grade lightweight titanium and features a central muffler that expands to produce two sets of tailpipes, with a choice of either a titanium or carbon-fibre finish designed to complement the lines of the car. Two valves on either side of the muffler control the airflow and are contained in valve housings cast in the Akrapovič in-house foundry. The Evolution Line (Titanium) will reduce overall vehicle weight while delivering extra power and torque through the whole rev range. With a specially developed and tuned sound, the system delivers a very high-frequency and sporty tone, especially when the car is in the higher rev range. In the normal mode, the sound is quiet and ideal for town driving and cruising, but it still has the unmistakable Akrapovič feel. This is achieved through a carefully designed X-crossing element in the link pipes that influences the sound. This allows the exhaust gases to mix from both sides of the engine, placing the resulting combination on par with a finely tuned musical instrument and creating incredible high-frequency overtones as the revs rise, all without any compromise to aural clarity and comfort.An optional Akrapovič Sound Kit is available, which will increase the aural pleasure at lower revs and further supplement the sound as the revs rise, adding a thrill to the launch of the car from a standstill. Installation is plug&play, with no need to remap the ECU.