- The Q4 employs intricate chambers, baffles and proprietary multistage packing material
- With the Q4 you don?t need to hear the power, just feel the power!
- Less sound equals more ground
- Power gains throughout the entire rpm range
- Spark arrestor included
- Pounds lighter than stock
- Rugged design for off-road endurance
- Made in the U.S.A.
Husqvarna -- FE 501 -- (2020, 2021, 2022); Husqvarna -- FE 250 -- (2020, 2021, 2021, 2022); Husqvarna -- FE 350 -- (2020, 2021, 2022); Husqvarna -- FE 450 -- (2021, 2020, 2022, 2023); KTM -- 500 XCF-W -- (2020, 2021, 2022); KTM -- 350 XCF-W -- (2020, 2021, 2022); KTM -- 450 XCF-W -- (2023); Gas Gas -- EC 350F -- (2021); Gas Gas -- EC 250F -- (2021)
