The FMF Q4 HEX S/A 041601 exhaust system is engineered for riders demanding superior off-road performance while keeping sound emissions to a minimum. Utilising sophisticated chambers, baffles, and advanced multi-stage packing materials, this slip-on muffler delivers robust power gains across the entire RPM range, all while meeting strict USFS and FIM World Enduro noise regulations. Its lightweight, durable construction makes it ideal for enduring the rigours of off-road racing, and it includes a spark arrestor for rider safety and regulatory compliance. Designed and manufactured in the USA, the Q4 HEX sets the benchmark for quiet, high-performance exhaust technology.
Features
- Meets USFS and FIM World Enduro sound regulations for legal compliance
- Noticeably lighter than OEM exhaust systems
- Delivers increased power and torque across the full RPM range
- Includes a spark arrestor and quiet insert
- Constructed for rugged off-road durability
- Manufactured in the USA with high-grade materials
- Proprietary packing materials enhance long-term performance
- Slip-on installation for ease of fitment
Specifications
- Item ID: 041601
- Type: Slip-On
- Configuration: Single
- Construction: Aluminium body
- Finish: Natural
- Midpipe: Stainless Steel
- Endcap: Stainless Steel
- Spark Arrestor: Screen Insert (included)
- Quiet Insert: Included
- Carb Warning: No
Vehicle Fitment
Honda
- CRF450R (2021?2026)
- CRF450RX (2021?2026)
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