FMF Factory 4.1 RCT Slip-On Muffler (Titanium/Carbon End Cap) 044488 - Yamaha YZ450F / WR450F / YZ450FX 2018-2026

FMF Factory 4.1 RCT Slip-On Muffler (Titanium / Carbon End Cap) 044488 — Yamaha YZ450F / WR450F / YZ450FX 2018-2026

Product Description

The FMF Factory 4.1 RCT Slip-On Muffler incorporates advanced FMF Resonance Chamber Technology™ both internally and externally to optimize performance.

Engineered with a shorter overall length, it reduces vulnerability to crash damage while supporting Factory Forward Engineering by shifting the muffler closer to the engine to centralize mass. Built entirely from aerospace-grade materials meeting exacting specifications, it is manufactured 100% in Southern California.

Top Features: FMF Factory 4.1 RCT Slip-On Muffler

• Incorporates FMF Resonance Chamber Technology™ internally and externally for enhanced performance.
• Achieves a shorter overall length that resists crash damage and centralizes mass by moving closer to the motor.
• Constructed strictly from aerospace-grade materials meeting exacting specifications.
• Proudly 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 slip-on muffler 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 installing a titanium slip-on muffler, clean the mid-pipe connection thoroughly and apply a thin layer of high-temperature anti-seize or silicone sealant to prevent leaks before tightening the mounting clamp.

Recommended Pairings:

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

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