The Radical Racing GP-Carbon is a sporty exhaust system in GP style. The exhaust system, i.e. the connecting pipes as well as the rear silencer are made of stainless steel. In addition, the exhaust system is supplied with a matching catalytic converter. A dB-Killer is pre-assembled. This, together with the existing EG-BE, makes the exhaust system completely legal for use on public roads. If the dB-killer or catalytic converter is removed of course, this will result in a small increase in performance of about 3-5PS and a loss of the approval.