Back to Exhaust

FMF Factory 4.1 — RCT Titanium Anodized Full System (044486)

Part # 044486
Item #357890
Fits 3 motorcycles
  • Yamaha
    • WR250F · 2023–2026
    • YZ250F · 2019–2026
    • YZ250FX · 2020–2026
Regular price $849.99 Sale price$764.99 Save $85.00
/
Shipping calculated at checkout.
  • In stock, ready to ship
  • Backordered, shipping soon

  • Flat $10 U.S. shipping, free over $100
  • Ships from one of three U.S. warehouses
  • Secure checkout
WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov
FMF Factory 4.1 RCT Titanium Anodized Full System — Yamaha WR250F (2023-2025), Yamaha YZ250F (2019-2026) + 1 more, 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

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 2023–2026
  • Yamaha YZ250F 2019–2026
  • Yamaha YZ250FX 2020–2026

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.

You may also like