- 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.
Beta -- 390 RR 4T -- (2020, 2021, 2024, 2023); Beta -- 480 RR 4T -- (2020, 2021, 2024, 2023); Beta -- 350 RR 4T -- (2020, 2021, 2024, 2023); Beta -- 430 RR 4T -- (2020, 2021, 2023, 2024)
