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FMF Factory 4.1 — Full System (044235)

Part # 044235
Item #357753
Fits 4 motorcycles
  • Yamaha
    • WR250F · 2007–2013
    • WR450F · 2007–2011
    • YZ250F · 2006–2009
    • YZ450F · 2006–2009
$499.99 $449.99 Save $50.00
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  • In stock, ready to ship
  • Backordered, shipping soon
  • Flat $10 U.S. shipping, free over $100
  • Ships from one of three U.S. warehouses
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WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov
FMF Factory 4.1 Full System — Yamaha WR250F (2007-2013), Yamaha WR450F (2007-2011) + 2 more, 4-Stroke
Product Details

The Factory 4.1 is FMF's race-bred 4-stroke full system — the foundation of the Factory 4.1 RCT lineup. Lighter than stock with FMF's race-tested tuning across the RPM range.

  • Lighter than stock 4-stroke system
  • FMF race-developed tuning
  • Stainless steel construction
  • Rapid Tuning System (RTS) compatible

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.

Fitment

  • Yamaha WR250F 2007–2013
  • Yamaha WR450F 2007–2011
  • Yamaha YZ250F 2006–2009
  • Yamaha YZ450F 2006–2009

Specifications

System TypeFull system
MaterialTitanium (proprietary alloy grade)
Material GradeAerospace grade
FinishBlue anodized (muffler)
End Cap MaterialCarbon fiber (blue)
TechnologyFMF Resonance Chamber Technology (RCT)
Made InUSA
Best ForOff-road / Trail, MX / Motocross

Verified from Garamoto’s catalog & fitment data.

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