This stunning system is made completely from high-grade titanium. It includes parts cast in the company's in-house foundry, featuring an active X connection and an additional pair of exhaust valves behind the rear mufflers, designed to provide optimal control of the exhaust sound for the best aural enjoyment. The system has been perfectly tuned to deliver the very best sound experience in all modes " enormous effort was invested to give it a sporty, deep higher-frequency V8 sound with an unmistakable Akrapovic character, while keeping it smooth and eliminating any drone for maximum everyday comfort. By using the optional Akrapovic Sound Kit