FMF Racing Universal 1-1/4" Turbinecore 2 Spark ArrestorFMF Universal 2 Stroke Turbinecore Silencer The FMF Universal 2 Stroke Silencer is made specifically for those machines that do not have a direct bolt on application. Utilizing the Turbine Dampening System from the FMF Turbine Core Spark Arrestor, the Universal 2 Stroke Silencer is also perfect for the vintage rider in need of a legal spark arrestor. The Universal 2 Stroke Pipe comes with all hardware needed for the home mechanic to retrofit the unit