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FMF Factory 4.1 — RCT Titanium Anodized Full System — Yamaha YFZ450R (2009-2026), Yamaha

Part # 044400
Item #357768
Fits 2 motorcycles
  • Yamaha
    • YFZ450R · 2009–2026
    • YFZ450X · 2010–2011
$674.99 $607.49 Save $67.50
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WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov
FMF Factory 4.1 RCT Titanium Anodized Full System — Yamaha YFZ450R (2009-2026), Yamaha YFZ450X (2010-2011), 4-Stroke
Product Details

The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology (RCT) — both internally and externally. A patent-pending shape enhances and refines the exhaust pressure wave for optimal power output while lowering the sound level. Constructed from aerospace-grade titanium with a carbon end cap, the system is shorter, lighter, and quieter than stock.

  • FMF Resonance Chamber Technology (RCT) for power + quieter operation
  • Aerospace-grade titanium construction with carbon end cap
  • Shorter overall length — less crash-damage exposure, mass centralized
  • Rapid Tuning System (RTS) for easy insert and spark-arrestor swaps
  • Quieter than stock with huge weight savings
  • Manufactured 100% in Southern California

Fitment: 4-stroke bike specific — fits the following models:

  • Yamaha YFZ450R (2009-2026)
  • Yamaha YFZ450X (2010-2011)

This is a 4-stroke exhaust. It is engineered for the 4-stroke engine architecture above and physically will not fit a 2-stroke bike. Verify your engine type before purchase.

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