FMF Factory 4.1 RCT Full Exhaust System (Stainless/Aluminum/Carbon) 044456 - Yamaha YZ250F / YZ250FX / WR250F 2019-2026

FMF Factory 4.1 RCT Full Exhaust System (Stainless Steel / Aluminum / Carbon Fiber) 044456 — 2019-2026 Yamaha YZ250F, YZ250FX, and WR250F

Product Description

The FMF Factory 4.1 RCT Full Exhaust System integrates FMF's patented Resonance Chamber Technology™ both internally and externally[cite: 1] to deliver massive power gains across the entire RPM range[cite: 1] while maximizing weight savings[cite: 1].

Engineered with a shorter overall length that resists crash damage[cite: 1], this system pairs FMF's Factory Forward Engineering[cite: 1] to centralize mass by moving the muffler closer to the motor[cite: 1]. Handcrafted entirely at FMF's Southern California facility[cite: 1] using aerospace-grade materials[cite: 1], this complete system pairs a stainless steel MegaBomb header[cite: 1] with an aluminum muffler and a carbon fiber end cap.

Top Features: FMF Factory 4.1 RCT Full System

• Incorporates internal and external Resonance Chamber Technology™ (RCT)[cite: 1].
• Shorter profile centralizes mass and reduces vulnerability to crash damage[cite: 1].
• Constructed from premium aerospace-grade materials 100% in Southern California[cite: 1].
• Includes a stainless steel MegaBomb header and a spark arrestor screen insert[cite: 1].
• Delivers massive power gains across the entire powerband alongside major weight savings[cite: 1].

Please review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.

Fitment List

Frequently Asked Questions

Q: Does this full exhaust system include the MegaBomb header?
A: Yes, this complete system includes the stainless steel MegaBomb header[cite: 1].

Q: Is a spark arrestor and quiet insert included?
A: Yes, it includes both a 94dB sound insert[cite: 1] and a spark arrestor screen insert[cite: 1].

Expert Pro-Tip: When installing a new full exhaust system, leave all head pipe flange nuts and mid-pipe clamp bolts loose until the entire system is properly aligned on the chassis to eliminate pre-load and prevent exhaust leaks.

Recommended Pairings:

• Yamaha YZ250F Performance Parts
• Yamaha 4-Stroke Performance Parts
• Motorcycle Tools & Accessories

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