FMF Factory 4.1 RCT Exhaust System (Megabomb/Titanium/Carbon End Cap) 044489 — Yamaha YZ450F / WR450F / YZ450FX 2023-2026

FMF Factory 4.1 RCT Exhaust System (Titanium / Carbon End Cap) 044489 — Yamaha YZ450F / WR450F / YZ450FX 2023-2026

Product Description

The FMF Factory 4.1 RCT Exhaust System incorporates the latest in FMF Resonance Chamber Technology™ both internally and externally to maximize power output.

Engineered with a shorter overall length that reduces susceptibility to crash damage, it supports Factory Forward Engineering by moving the muffler closer to the motor to centralize mass. Constructed entirely from aerospace-grade materials meeting exacting specifications, it is manufactured 100% at the Southern California facility.

Top Features: FMF Factory 4.1 RCT Exhaust System

• Incorporates FMF Resonance Chamber Technology™ both internally and externally for enhanced performance.
• Shorter overall length resists crash damage and centralizes mass by shifting the muffler closer to the engine.
• Constructed exclusively from aerospace-grade materials meeting exacting specifications.
• Manufactured 100% at the Southern California factory.

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: Is this exhaust system street legal?
A: No, it is designated for closed course use only.

Q: Where is the Factory 4.1 RCT manufactured?
A: It is manufactured 100% at FMF's Southern California factory.

Expert Pro-Tip

Expert Pro-Tip: When mounting a full titanium exhaust system, use anti-seize on the slip joints to prevent galling, and leave all header flange nuts and mid-pipe hardware loose until the entire system aligns naturally to avoid stress cracking.

Recommended Pairings:

• Yamaha YZ450F Performance Parts
• Motorcycle Tools & Accessories
• Motorcycle Chemicals & Maintenance

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