Features:
- Overall increase in power and torque
- Space age internal packing material for maximum longevity
- Internal shape of core uses Hi-Flo technology
- Durable stainless steel and aluminum construction
- Includes removable spark arrestor
- Enhanced sonic evacuation provides for higher flow and increased power
- For closed course competition use only.
- NOTE: Will not pass 2025 FIM sound regulation
Fit the models:
| KAWASAKI |
KX 250 |
2025 |
| KAWASAKI |
KX 250 |
2026 |
| KAWASAKI |
KX 250 X |
2026 |
| KAWASAKI |
KX 250 X |
2025 |

FMF - Flying Machine Factory - 1973 was founded by a twenty-two-year-old named Donny Emler, a typical Southern Californian who, like everyone else in the 1970s, found a passion for riding and racing dirt bikes. FMF is now one of the most recognizable logos in motocross. The main area of FMF is the highest quality exhaust systems for dirt bikes.