FMF Turbinecore 2 Universal Spark Arrestor - 2-Stroke (1-1/8") This is a great universal spark arrestor for 2-stroke machines! Using the proven design of the FMF Turbine Core Spark Arrestor, this version is made specifically for those machines that do not have a bolt on application. Using the exclusive "Turbine Dampening System" makes it a U.S. Forestry approved silencer. The Universal is also perfect for the older vintage machines in need of a legal spark arrestor. The straight-through design of the spark arrestor canister and the performance flow stainless steel end cap ensures strength, durability and most importantly, track and trail-proven unrestricted power.