The FMF PowerCore 4 HEX Muffler is designed to deliver race-inspired performance, improved torque, and increased horsepower for select Yamaha four-stroke motorcycles. Built for riders who want dependable performance without sacrificing durability, this muffler features a high-flow internal core and enhanced sonic evacuation to support improved exhaust flow and responsive engine performance. The FMF manufacturer part number is 044423.
Constructed from durable stainless steel and aluminum, the FMF PowerCore 4 HEX is engineered to withstand demanding off-road use. Its space-age internal packing material is designed for extended service life, while the removable spark arrestor helps support responsible trail riding where approved spark-arresting equipment is required. The muffler can be used with either an FMF header or the stock OEM header, providing flexible installation options for compatible Yamaha models.
Fitment includes the 2014-2017 Yamaha YZ250F, 2015-2017 Yamaha YZ250FX, and 2015-2017 Yamaha WR250F. Confirm your motorcycle model and year before ordering to ensure proper compatibility. The FMF PowerCore 4 HEX Muffler combines practical construction, strong exhaust flow, and a performance-focused design for riders seeking a durable replacement or upgrade for their Yamaha motorcycle.
Features:
- Performance: Provides an overall increase in engine power and torque.
- Construction: Durable stainless steel and aluminum materials are built for demanding off-road use.
- Packing: Space-age internal packing material promotes extended muffler longevity.
- Flow Technology: Hi-Flo internal core design supports improved exhaust flow.
- Sound Evacuation: Enhanced sonic evacuation helps increase flow and power.
- Spark Arrestor: Includes a removable spark arrestor for compatible trail-use requirements.
- Header Compatibility: Can be used with an FMF header or the stock OEM header.
- Fitment: Fits 2014-2017 Yamaha YZ250F, 2015-2017 Yamaha YZ250FX, and 2015-2017 Yamaha WR250F.
- Brand: FMF.
- Manufacturer Part Number: 044423.
- Vendor Part Number: 044423.
Fitment:
2014 Yamaha YZ250F
2015 Yamaha WR250F
2015 Yamaha YZ250F
2015 Yamaha YZ250FX
2016 Yamaha WR250F
2016 Yamaha YZ250F
2016 Yamaha YZ250FX
2017 Yamaha WR250F
2017 Yamaha YZ250F
2017 Yamaha YZ250FX
2018 Yamaha WR250F
2018 Yamaha YZ250F
2018 Yamaha YZ250FX
2019 Yamaha WR250F
2019 Yamaha YZ250FX