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FMF Factory 4.1 — RCT Stainless Full System (044443)

Part # 044443
Item #357782
Fits 3 motorcycles
  • Yamaha
    • WR450F · 2019–2026
    • YZ450F · 2018–2026
    • YZ450FX · 2019–2026
$649.99 $584.99 Save $65.00
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  • Low stock - 8 items left
  • 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 RCT Stainless Full System — Yamaha WR450F (2019-2026), Yamaha YZ450F (2018-2026) + 1 more, 4-Stroke
Product Details

The Factory 4.1 RCT in stainless steel construction. Same Resonance Chamber Technology and power gains as the titanium system, with a stainless mid-pipe and muffler body for budget-friendly toughness. Shorter length, lighter than stock, and quieter than OEM with FMF's Rapid Tuning System.

  • FMF Resonance Chamber Technology (RCT)
  • 304 stainless steel construction — rugged and corrosion-resistant
  • Shorter overall length for mass centralization
  • Rapid Tuning System (RTS) — sound insert and spark arrestor swaps
  • Quieter than stock with weight savings

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 WR450F 2019–2026
  • Yamaha YZ450F 2018–2026
  • Yamaha YZ450FX 2019–2026

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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