The Evolution Line (Titanium) exhaust system for the Mercedes-AMG G 63 is Akrapovic?s first venture into the high-performance off-road market. It is constructed with high-grade durable lightweight titanium to reduce weight. This system is beautifully finished with specially-designed tailpipes exiting on either side of the vehicle, perfectly routed to fit within limited space. It delivers a unique sound for a sporty edge, specially programmed by the Akrapovic Sound Engineers, with a pair of exhaust valves behind the rear mufflers to provide optimal control of the exhaust tones while increasing power and torque levels. This system is ECE type approved.An optional Akrapovic Sound Kit is available to control the different sound settings. Optional downpipes are also offered to provide full exhaust-tuning capabilities. Fittment notice: This system does not fit on vehicles equipped with Otto particulate filter (OPF).