FMF Factory 4.1 RCT Exhaust System (Aluminum/Stainless Steel/Carbon Fiber) 044477 - Yamaha WR450F / YZ450F / YZ450FX 2023-2026

Product Description

Maximize your machine's potential with the FMF Factory 4.1 RCT Exhaust System, engineered for serious off-road riders demanding elite performance. This complete system incorporates advanced FMF Resonance Chamber Technology both internally and externally to maximize power output while reducing sound levels.

Designed with a shorter overall length that is less susceptible to crash damage, this system complements Factory Forward Engineering by moving the muffler closer to the motor to centralize mass. Built entirely from aerospace-grade materials, it features an anodized aluminum muffler body, a durable stainless steel header, and a lightweight carbon fiber end cap.

Top Features: FMF Factory 4.1 RCT

• Incorporates FMF Resonance Chamber Technology™ both internally and externally
• Shorter overall length that is less susceptible to crash damage and complementary to Factory Forward Engineering, moving the muffler closer to the motor to centralize mass
• Constructed from only aerospace grade materials that meet exacting specifications and is manufactured 100% at the southern California factory
• Spark arrestor screen insert included
• 94dB insert included

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 exhaust system include a spark arrestor?
A: Yes, a spark arrestor screen insert is included in the package.

Q: What sound reduction inserts come with the system?
A: It includes a 94dB sound insert right out of the box.

Q: What materials are used in this exhaust build?
A: It features an aluminum muffler, stainless steel header, and carbon fiber end cap.

Expert Pro-Tip

Expert Pro-Tip: When servicing your exhaust system, inspect the packing material inside the aluminum canister every 20-30 hours of riding. Fresh packing ensures optimal performance, maintains proper sound levels, and protects your carbon fiber end cap from excessive heat degradation.

Recommended Pairings:

• Yamaha YZ450F Performance Upgrades & Accessories
• Yamaha 4-Stroke Performance Parts
• Motorcycle Tools & Accessories

About Moto-House MX

At Moto-House MX, we carry the best brands in motocross and off-road performance. Our team has over 40 years of experience helping riders get more out of their bikes. We pride ourselves on great customer service, and every item ships FAST - straight to your door.

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