The Akrapovic Racing and Evolution complete exhaust systems are the flagships of our product lines. They are designed for competition-oriented MX riders who demand maximum performance from their exhaust systems. With their production quality, engine performance improvements and modern Hexagonal muffler design they satisfy the requirements of all riders. New for 2008 is additional chamber that helps to reduce noise emission and provides better power and torque at low rpm range. simple mounting excellent upgrade in performance deep sound hexagonal shape muffler eye-catching product which significantly changes the appearance of the bike improved engine characteristics: more power and torque in comparison with the stock muffler and competing products high quality and exotic materials: combination of carbon-fiber and titanium precision workmanship choice of carbon-fiber or titanium muffler outer sleeve lower weight in comparison with stock muffler and competing products Click Here for Additional Exhaust Information