- 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
KTM -- 250 XC-W -- (2017, 2018); KTM -- 300 XC -- (2017, 2018, 2019); KTM -- 300 XC-W -- (2017, 2018, 2019); KTM -- 250 XC -- (2017, 2018); KTM -- 250 SX -- (2017, 2018); Husqvarna -- TX 300 -- (2017, 2018); Husqvarna -- TE 250 -- (2017, 2019, 2018); Husqvarna -- TC 300 -- (2017, 2018); Husqvarna -- TC 250 -- (2017, 2018); Husqvarna -- TE 300 -- (2017, 2018, 2019); Husqvarna -- TX 250 -- (2017, 2018)