FMF Racing Factory 4.1 RCT Slip-On Exhaust

Part Number: 044445
Muffler: Anodized Titanium
End Cap: Carbon Fiber
Spark Arrestor: Screen Insert (included)

• Constructed from only aerospace grade materials that meets FMF exact specifications
• Shorter overall length is less susceptible to crash damage
• Shorter length design moves the muffler closer to the motor and improves centralize mass
• Greater canister volume helps reduce sound and increases packing life
• Race team tested and approved
• 100% Made in the USA
• Massive Power gains throughout the RPM range
• Huge weight savings
• New RTS (Rapid Tuning System)

​​The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology™ both internally and externally. In addition, we achieve a shorter overall length that is less susceptible to crash damage and complementary to our Factory Forward Engineering - moving the muffler closer to the motor to centralize mass. The Factory 4.1 RCT is constructed from only aerospace grade materials that meet our exacting specifications and is manufactured 100% at our Southern California factory.

Fits: 
2024 Yamaha YZ450F
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2022 Yamaha YZ450F
2021 Yamaha YZ450F
2020 Yamaha YZ450F
2019 Yamaha YZ450F
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2023 Yamaha YZ450FX
2022 Yamaha YZ450FX
2021 Yamaha YZ450FX
2020 Yamaha YZ450FX
2019 Yamaha YZ450FX
2019 Yamaha WR450F

Notice: Closed Course Use Only