Description
The FMF Racing Factory 4.1 RCT Slip-On is engineered for riders seeking the ultimate blend of mass centralisation, power, and durability. Developed with FMF's proprietary Resonance Chamber Technology™ and Factory Forward Engineering, this system utilises aerospace-grade materials, delivering both weight reduction and exceptional strength. The short, robust design improves mass centrality and decreases the risk of crash damage, while a carbon end cap and stainless steel midpipe ensure outstanding longevity and aesthetics. Manufactured entirely at FMF’s Southern California facility, this premium slip-on offers serious power gains across the RPM range for demanding off-road applications.
Features
- Closed course competition use only for maximum performance
- Robust slip-on configuration with single outlet
- Aerospace-grade aluminium construction with carbon fibre end cap for strength and lightweight
- Rapid Tuning System (RTS) streamlines setup and adjustments
- Reduced weight improves handling (7.8 lbs)
- Substantial power and torque enhancements across all revs
- Includes screen-type spark arrestor and 94dB quiet insert
- Premium stainless steel midpipe for resilience and corrosion resistance
Specifications
- Item ID: 044453
- Type: Slip-On
- Configuration: Single
- Construction: Aluminium
- Finish: Natural
- Midpipe: Stainless Steel
- End Cap: Carbon
- Spark Arrestor: Screen Insert (included)
- Carb Warning: No
- Quiet Insert: 94dB Insert (included)
- Weight: 7.8 lbs
Vehicle Fitment
YAMAHA
- WR250F (2023–2024)
- YZ250F (2019–2026)
- YZ250FX (2020–2026)