Pay your Sportster the ultimate compliment with an Akrapovič exhaust system. That classic, legendary Harley-Davidson design now comes with more attitude. Chose our Open System for optimum performance and deep resonant sound. Akrapovič Open Systems includes header, silencer and heatshield, optional noise reduction insert is available. For perfect performance, throttle response and durability special developed mapping from our partner Dynojet has to be used.