- 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 2.1 utilizes a shape inspired by the 4.1 system
- Utilizes exclusive FMF "Turbine Dampening System"
- U.S. Forest Service legal status
Husqvarna -- TE 300i -- (2020, 2021, 2022, 2023); Husqvarna -- TE 250i -- (2020, 2021, 2022, 2023); Husqvarna -- TX 300i -- (2020, 2021, 2022, 2023); Husqvarna -- TC 250 -- (2021, 2021, 2022, 2019, 2020); Husqvarna -- TX 300 -- (2019, 2020); KTM -- 250 XC TPI -- (2020, 2021, 2022); KTM -- 300 XC TPI -- (2020, 2021, 2022); KTM -- 250 XC-W TPI -- (2020, 2021, 2022); KTM -- 300 XC-W TPI -- (2020, 2021, 2022); KTM -- 250 SX -- (2021, 2022, 2019, 2020); KTM -- 300 XC -- (2019, 2020); KTM -- 250 XC -- (2019, 2020); Gas Gas -- EC 300 -- (2021, 2022); Gas Gas -- EX 300 -- (2021, 2022); Gas Gas -- EC 250 -- (2021, 2022); Gas Gas -- EX 250 -- (2022)