Upgrade the exhaust performance of your Yamaha YFZ450R with the FMF Factory 4.1 RCT slip-on muffler. Designed with FMF Resonance Chamber Technology, this exhaust system uses a patented core shape to reduce sound levels while maintaining strong power output. Its chamber design helps refine exhaust pressure for responsive performance across the rev range.
The patented canister shape increases internal volume for additional sound-absorbing material, while FMF Factory Forward Engineering centralizes mass and helps reduce the likelihood of crash damage. Application-specific core specifications provide a tuned exhaust configuration developed for the Yamaha YFZ450R platform. The titanium canister and mid-pipe provide a lightweight, durable construction suited to demanding off-road and racing environments.
The innovative rear end cap allows straightforward installation of tuning tip inserts or a spark arrestor. This FMF muffler includes a spark arrestor and wash plug for convenient trail preparation and maintenance. It fits 2009–2018 Yamaha YFZ450R models and is designed as a direct-fit slip-on replacement for compatible factory exhaust components. Manufacturer part number: FMF 044400. Vendor part number: 044400.
Features:
- Resonance Chamber Technology helps reduce sound while maintaining maximum power output
- Patented core shape refines exhaust performance and sound control
- Patented canister design provides increased internal volume for sound-absorbing material
- Patented chamber design enhances and refines exhaust pressure
- Factory Forward Engineering centralizes mass and helps reduce crash exposure
- Application-specific tuned core specifications optimize performance for the Yamaha YFZ450R
- Rear end cap supports simple installation of tuning tip inserts or a spark arrestor
- Titanium canister and mid-pipe provide lightweight, durable construction
- Includes spark arrestor and wash plug
- Fits 2009–2018 Yamaha YFZ450R models
Fitment:
2009 Yamaha YFZ450R
2010 Yamaha YFZ450R
2011 Yamaha YFZ450R
2012 Yamaha YFZ450R
2013 Yamaha YFZ450R
2014 Yamaha YFZ450R
2015 Yamaha YFZ450R
2016 Yamaha YFZ450R
2017 Yamaha YFZ450R
2018 Yamaha YFZ450R
2019 Yamaha YFZ450R
2020 Yamaha YFZ450R
2021 Yamaha YFZ450R
2022 Yamaha YFZ450R