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FMF Factory 4.1 — RCT Stainless Full System — Kawasaki KX250F/KX250X (042413)

Part # 042413
Item #357709
Fits 2 motorcycles
  • Kawasaki
    • KX250F · 2025-2026
    • KX250X · 2025-2026
Regular price $1,049.99 Sale price$944.99 Save $105.00
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FMF Factory 4.1 RCT Stainless Full System — Kawasaki KX250F (2025-2026), Kawasaki KX250X (2025-2026), 4-Stroke
Product Details

The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology™ both internally and externally. In addition, we achieve a shorter overall length that is less susceptible to crash damage and complementary to our Factory Forward Engineering - moving the muffler closer to the motor to centralize mass. The Factory 4.1 RCT is constructed from only aerospace grade materials that meet our exacting specifications and is manufactured 100% at our Southern California factory.

  • Available in Natural Aluminum with Carbon Fiber End Cap
  • Massive Power gains throughout the RPM range.
  • Huge weight savings
  • New RTS (Rapid Tuning System)
  • FMF uses the highest quality proprietary blend stainless steel made especially to our standards.

Full system. Header and muffler included.

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

  • Kawasaki KX250F 2025–2026
  • Kawasaki KX250X 2025–2026

Specifications

System TypeFull system
MaterialAluminum
Material GradeAerospace grade
FinishNatural
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.