Pay your Dyna the ultimate compliment with an Akrapovič chrome Slip-On exhaust system. This classic, legendary Harley-Davidson design now comes with an aftermarket Akrapovič exhaust system that offers more power, less weight, and a unique sound and looks.EC type-approval is valid only when optional catalytic converter is installed.The Slip-Ons feature an optional valve system enabling you to adjust the sound level with a simple switch and keep your hands clean!