FMF Factory 4.1™ Exhaust System 044438 NOTE: Will not pass 2025 FIM sound regulation Yamaha YFZ 450 R 2009-2017, 2019-2027 Yamaha YFZ 450 R 2018 (AMERICA) Yamaha YFZ 450 RSE Special Edition 2009-2020 Yamaha YFZ 450 X 2010-2011 (AMERICA) Yamaha YFZ 450 XBB Bill Ballance Edition 2010 (AMERICA) Yamaha YFZ 450 XSE Special Edition 2011 (AMERICA)
Check fitmentFMFPart no. 044438
Our price £1,151.88
RRP £1,212.50Save £60.62 (5%)
Quantity 1 buys one item.
Price includes applicable VAT. Delivery calculated separately.
Choose your make, model and year to view its supplier application.
Product details
Factory 4.1™ Exhaust System Complete system Superior power and performance - horsepower improved throughout the rpm range Factory forward engineering centralizes mass, improves handling NOTE: Will not pass 2025 FIM sound regulation Features FMF Megabomb header.
Supplier reference: 18300410
Manufacturer reference: 044438
Dimensions & specification
- Weight Imperial
- 5 lb
- Design/Configuration
- 1-Into-1 System
- Muffler Material
- Titanium
- Weight
- 2,27 kg (5 lb)
- Model
- Factory 4.1
- Riding Style
- ATV
- Pipe Material
- Stainless Steel
- Product Name
- Exhaust System
- Type
- Full System
- End Cap Material
- Carbon Fiber
- Weight Metric
- 2.27 kg
- Muffler Color/Finish
- Anodized Blue
- Units
- Each
Delivery & returns
UK standard delivery: 6–10 working days. In-stock parts dispatch within 2–3 working days.
The right part starts
with the right details.
Compare your model, year and exact variant, then check the number on your original part.
Vehicle fitment
35 supplier-listed vehicle applications.
| Make | Model & variant | Year | Vehicle type | Vehicle ID | Variant | Market |
|---|---|---|---|---|---|---|
| YAMAHA | YFZ 450 R | 2009 | 28585 | ALL | ||
| YAMAHA | YFZ 450 R | 2010 | 28593 | ALL | ||
| YAMAHA | YFZ 450 R | 2011 | 50091 | ALL | ||
| YAMAHA | YFZ 450 R | 2012 | 68247 | ALL | ||
| YAMAHA | YFZ 450 R | 2013 | 79387 | ALL | ||
| YAMAHA | YFZ 450 R | 2014 | 86399 | ALL | ||
| YAMAHA | YFZ 450 R | 2015 | 89439 | ALL | ||
| YAMAHA | YFZ 450 R | 2016 | 99277 | ALL | ||
| YAMAHA | YFZ 450 R | 2017 | 101039 | ALL | ||
| YAMAHA | YFZ 450 R | 2018 | 105169 | AMERICA | ||
| YAMAHA | YFZ 450 R | 2019 | 109939 | ALL | ||
| YAMAHA | YFZ 450 R | 2020 | 117961 | ALL | ||
| YAMAHA | YFZ 450 R | 2021 | 141707 | ALL | ||
| YAMAHA | YFZ 450 R | 2022 | 156556 | ALL | ||
| YAMAHA | YFZ 450 R | 2023 | 156557 | ALL | ||
| YAMAHA | YFZ 450 R | 2024 | 169593 | ALL | ||
| YAMAHA | YFZ 450 R | 2025 | 186749 | ALL | ||
| YAMAHA | YFZ 450 R | 2026 | 209784 | ALL | ||
| YAMAHA | YFZ 450 R | 2027 | 217617 | ALL | ||
| YAMAHA | YFZ 450 RSE | 2009 | 28587 | Special Edition | ALL | |
| YAMAHA | YFZ 450 RSE | 2010 | 28595 | Special Edition | ALL | |
| YAMAHA | YFZ 450 RSE | 2011 | 50093 | Special Edition | ALL | |
| YAMAHA | YFZ 450 RSE | 2012 | 68249 | Special Edition | ALL | |
| YAMAHA | YFZ 450 RSE | 2013 | 79389 | Special Edition | ALL | |
| YAMAHA | YFZ 450 RSE | 2014 | 86401 | Special Edition | ALL | |
| YAMAHA | YFZ 450 RSE | 2015 | 89441 | Special Edition | ALL | |
| YAMAHA | YFZ 450 RSE | 2016 | 99279 | Special Edition | ALL | |
| YAMAHA | YFZ 450 RSE | 2017 | 101035 | Special Edition | ALL | |
| YAMAHA | YFZ 450 RSE | 2018 | 105167 | Special Edition | ALL | |
| YAMAHA | YFZ 450 RSE | 2019 | 109937 | Special Edition | ALL | |
| YAMAHA | YFZ 450 RSE | 2020 | 117959 | Special Edition | ALL | |
| YAMAHA | YFZ 450 X | 2010 | 1TD | 28589 | AMERICA | |
| YAMAHA | YFZ 450 X | 2011 | 1TD | 50095 | AMERICA | |
| YAMAHA | YFZ 450 XBB | 2010 | 1TD | 28591 | Bill Ballance Edition | AMERICA |
| YAMAHA | YFZ 450 XSE | 2011 | 1TD | 50097 | Special Edition | AMERICA |