- 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
Beta -- 200 RR 2T -- (2020, 2021, 2022, 2024, 2023); Beta -- 250 RR 2T -- (2021, 2020, 2022, 2023, 2024); Beta -- 300 RR 2T -- (2020, 2021, 2022, 2023, 2024); Beta -- 300 RX -- (2021, 2022, 2024, 2023)