The FMF Q4 Hex Spark Arrestor Muffler, manufacturer part number 045667 and vendor part number 045667, is designed for select Beta RR four-stroke off-road motorcycles. This exhaust muffler fits 2020-2023 Beta 350 RR, 430 RR and 480 RR models, including Race Edition (RE) applications where specified. Its Q4 Hex design supports efficient exhaust flow while helping maintain controlled sound output for trail and off-road riding.
FMF incorporates internal baffles, chambers and advanced sound-absorbing materials to accelerate exhaust flow with less noise and minimal power loss. The muffler is engineered to remain well below the 96 dB sound limit on most machines, helping riders meet strict sound requirements in applicable riding areas. A U.S. Forestry-approved spark arrestor with a maintenance-free stainless steel screen adds trail-ready functionality and helps prevent the discharge of hot exhaust particles.
Built for riders who need dependable performance, sound control and trail compliance, the FMF Q4 Hex is a practical replacement or upgrade for compatible Beta RR exhaust systems. Verify the motorcycle model, model year and Race Edition designation before installation to confirm fitment. Compatible applications include the 2020 Beta 350 RR (RE), 430 RR (RE) and 480 RR (RE); 2021 Beta 350 RR (RE), 430 RR (RE) and 480 RR (RE); 2022 Beta 350 RR (RE), 430 RR (RE) and 480 RR (RE); and 2023 Beta 350 RR (RE).
Features:
- Internal baffles, chambers and advanced sound-absorbing materials help accelerate exhaust flow with less noise and minimal power loss
- Designed to remain well below the 96 dB sound output on most machines to support strict sound requirements
- U.S. Forestry-approved spark arrestor with a maintenance-free stainless steel screen
- Fitment for select 2020-2023 Beta 350 RR, 430 RR and 480 RR Race Edition models
- Brand: FMF
- Model: Q4 Hex Spark Arrestor Muffler
- Manufacturer part number: 045667
- Vendor part number: 045667
Fitment:
2020 Beta 350 RR
2020 Beta 350 RR (RE)
2020 Beta 390 RR
2020 Beta 430 RR
2020 Beta 430 RR (RE)
2020 Beta 480 RR
2020 Beta 480 RR (RE)
2021 Beta 350 RR
2021 Beta 350 RR (RE)
2021 Beta 390 RR
2021 Beta 430 RR
2021 Beta 430 RR (RE)
2021 Beta 480 RR
2021 Beta 480 RR (RE)
2022 Beta 350 RR
2022 Beta 350 RR (RE)
2022 Beta 390 RR
2022 Beta 430 RR
2022 Beta 430 RR (RE)
2022 Beta 480 RR
2022 Beta 480 RR (RE)
2023 Beta 350 RR
2023 Beta 350 RR (RE)
2023 Beta 390 RR
2023 Beta 430 RR
2023 Beta 430 RR (RE)
2023 Beta 480 RR
2023 Beta 480 RR (RE)
2024 Beta 350 RR
2024 Beta 350 RR (RE)
2024 Beta 390 RR
2024 Beta 430 RR
2024 Beta 430 RR (RE)
2024 Beta 480 RR
2024 Beta 480 RR (RE)
2025 Beta 350 RR
2025 Beta 350 RR (RE)
2025 Beta 390 RR
2025 Beta 430 RR
2025 Beta 430 RR (RE)
2025 Beta 480 RR
2025 Beta 480 RR (RE)
2026 Beta 350 RR (RE)
2026 Beta 430 RR (RE)
2026 Beta 480 RR (RE)