Fitment:For Coleman CT100U Mini bike.Note: It is only applicable to CT100U and not to other models. Package Include:1 x Exhaust Pipe,1 x Exhaust Muffler,1 x screws and gasket kit. Please confirm the suitable model and size of the product to ensure that it can be properly adapted and there will be no collision. Easy installation: Install the exhaust pipe first and ensure that it is firmly installed before installing the muffler. Note: To prevent the muffler from coming loose under intense vibration, it is recommended to secure it to the vehicle frame using clamp-type parts.