The FMF Q4 Hex Muffler is designed for select Kawasaki KX450F and KX450X models, providing controlled exhaust performance with reduced sound output. Its internal baffles, chambers, and advanced sound-absorbing materials help accelerate exhaust flow while minimizing noise and limiting power loss. The result is a practical replacement or upgrade for riders who need dependable performance while meeting strict sound requirements.
This FMF muffler features a U.S. Forestry-approved spark arrestor with a maintenance-free stainless steel screen, making it suitable for off-road riding environments where spark-arresting equipment is required. The Q4 Hex Muffler is engineered for a precise fit on the listed Kawasaki applications and is identified by FMF manufacturer and vendor part number 042368.
Fitment includes the 2019, 2020, 2021, 2022, and 2023 Kawasaki KX450F, along with the 2021 and 2022 Kawasaki KX450X. Verify the motorcycle model and year before ordering to ensure compatibility. The FMF Q4 Hex Muffler combines efficient exhaust flow, practical sound control, and durable spark-arrestor protection in a purpose-built system for compatible Kawasaki motocross and off-road motorcycles.
Features:
- Internal baffles, chambers, and sound-absorbing materials help accelerate exhaust flow with less noise and minimal power loss
- Sound output is well below 96 dB on most compatible machines to help satisfy strict sound requirements
- U.S. Forestry-approved spark arrestor includes a maintenance-free stainless steel screen
- Designed to fit 2019–2023 Kawasaki KX450F and 2021–2022 Kawasaki KX450X models
- Brand: FMF
- Model: Q4 Hex Muffler
- Manufacturer part number: 042368
- Vendor part number: 042368
Fitment:
2019 Kawasaki KX450F
2020 Kawasaki KX450F
2021 Kawasaki KX450F
2021 Kawasaki KX450X
2022 Kawasaki KX450F
2022 Kawasaki KX450X
2023 Kawasaki KX450F
2023 Kawasaki KX450X