FMF Aluminum Factory 4.1 RCT (Slip-On) Carbon Fiber End Cap 2018-2022 Yamaha YZ450F

FMF Aluminum Factory 4.1 RCT (Slip-On) Carbon Fiber Rear End Cap

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Fitment - 2018-2022 Yamaha YZ450F / 2019-2021 Yamaha YZ450FX / 2019 Yamaha WR450F

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.

FMF Aluminum Factory 4.1 RCT (Slip-On) Carbon Fiber Rear End Cap:

• Patented RCT lowers decibels while maintaining maximum power output.
• Increase exhaust flow and power gains with RCT system's internal ducts for improved performance.
• FMF's Factory Forward Engineering centralizes mass and is less prone to crash damage
• Innovative rear end cap features simple installation of tuning tip inserts or spark arrestor with the removal of four screws
• Compatible with stock header or FMF header
• Meet AMA and FIM sound requirements
• Quiet Core 94db insert included - Made in the USA