The Akrapovic EVOLUTION complete exhaust systems are the championship winning flagships of our product lines. They are designed for competition-oriented MX riders who demand maximum performance from their exhaust systems, made of extremely durable high grade titanium. With their production quality, engine performance improvements, weight reduction and modern muffler design they satisfy even top pro racers. Our patented additional chamber helps to reduce noise emission and provides better power and torque delivery. The systems are designed for two markets; in the USA they are available with an approved spark arrester (second noise damper for usage without spark arrester is also included), and for the EU and other non-US markets they come with a noise damper (2mMax insert).