Our best selling Turbinecore 2 uses the exclusive "Turbine Dampening System". This top-notch product has well earned its U.S. Forest legal status. 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. The Turbinecore 2 is the #1 spark arrestor in the world. Fits: GasGas EC250 2021 EC300 2021 Husqvarna TE 250i 2023 TE250i 2020-2021 TE300i 2019-2021 KTM 250 XC-W 2T TPI 2023 EXC 250 2023