The Akrapovic slip-on exhaust is simple to install and a direct replacement. The hexagonal silencer dramatically improves your bike's visual appearance, whilst the exhaust itself gives more power, more torque, and less weight.The Akrapovic slip-on exhaust is simple to install and a direct replacement. The hexagonal muffler with it's twin outlet dramatically improves your bike's visual appearance, whilst the exhaust itself gives more power, more torque, and less weight.