FDY Performance
END OF LINE Factory 4.1 RCT Exhaust Silencer 14-18 Yamaha WR YZ 450 F FX - FMF 044406
END OF LINE Factory 4.1 RCT Exhaust Silencer 14-18 Yamaha WR YZ 450 F FX - FMF 044406
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The FMF Racing Factory 4.1 RCT Stainless Slip-On with Carbon End Cap is engineered for discerning riders, featuring advanced FMF Resonance Chamber Technology™ to enhance power and centralise mass. This slip-on exhaust, crafted from aerospace-grade materials, offers substantial power and weight advantages, a short profile to reduce crash vulnerability, and FMF’s innovative Factory Forward Engineering. Built with a natural aluminium muffler, stainless steel mid-pipe, and striking carbon end cap, the Factory 4.1 RCT is designed and manufactured in Southern California to exacting standards.
Features
- Closed course use only
- Advanced FMF Resonance Chamber Technology™
- Compact design helps avoid crash damage
- Natural aluminium muffler with carbon fibre end cap
- Aerospace-grade construction for high durability
- Significant power increase across the RPM range
- Substantial weight savings
- Includes Rapid Tuning System (RTS) for easy adjustments
- Spark arrestor screen insert included
- Quiet insert available separately (not included)
- Manufactured exclusively in FMF’s Southern California factory
Specifications
- Type: Slip-On
- Configuration: Single
- Construction: Aluminium
- Finish: Natural
- Midpipe: Stainless Steel
- Endcap: Carbon
- Spark Arrestor: Screen insert (included)
- Weight: 5.2 lbs
- Item ID: 044406
Vehicle Fitment
Yamaha
- WR450F (2016–2018)
- YZ450F (2014–2017)
- YZ450FX (2016–2018)
FDY Performance – Engineered for riders who demand more.
At FDY Performance, we deliver precision-engineered motorcycle parts trusted by riders across the UK and beyond. Every component is tested for reliability, durability, and peak performance so you can ride harder, longer, and with confidence.
We’re not just a brand — we’re a movement built by riders, for riders. Whether you’re chasing podiums, upgrading your build, or maintaining your machine, FDY Performance keeps you on the road and at the top of your game.
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