FMF Factory 4.1 RCT Slip-On Muffler (Blue Anodized Titanium/Carbon Fiber) 044445 - Yamaha YZ450F / YZ450FX 2018-2026

FMF Factory 4.1 RCT Slip-On Muffler (Blue Anodized Titanium/Carbon Fiber) 044445 - Yamaha YZ450F / YZ450FX 2018-2026

Product Description

The FMF Factory 4.1 RCT slip-on muffler delivers top-tier performance and championship engineering to your Yamaha YZ450F or YZ450FX. Designed with Resonance Chamber Technology, this system utilizes a patented core shape that reduces decibel levels while maintaining peak engine power output.

Crafted from a blue anodized titanium canister paired with a carbon fiber end cap, this muffler incorporates Factory Forward Engineering to centralize mass and improve crash resistance. Internal chamber ducts optimize exhaust gas volume to yield continuous power gains across the entire powerband.

Top Features: FMF Factory 4.1 RCT

• RCT (Resonance Chamber Technology) patented core shape lowers decibels while maintaining peak power.
• Internal chamber ducts increase volume to optimize exhaust flow and boost power throughout the RPM range.
• Factory Forward Engineering centralizes mass and provides greater crash resilience.
• Innovative rear end cap allows quick installation of tuning inserts or the included spark arrestor.
• Includes a pre-installed QuietCore 94 dB insert and spark arrestor for ultimate versatility.

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 a spark arrestor included with this muffler?
A: Yes, a spark arrestor is included in the muffler along with a QuietCore 94 dB insert.

Q: Does this slip-on require an aftermarket header, or will it work with stock?
A: This muffler is fully compatible with either your stock header or an aftermarket FMF header.

Expert Pro-Tip: When servicing your slip-on muffler, inspect the packing material regularly and repack it according to manufacturer intervals to maintain optimal decibel levels and preserve peak exhaust scavenging efficiency.

Recommended Pairings:

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

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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