What is the benefit of the shorter muffler length?

The shorter muffler length is part of FMF's Factory Forward Engineering. It helps centralize mass by moving the muffler closer to the motorcycle's motor, which can improve handling and makes the exhaust less prone to damage from crashes.

What does the Resonance Chamber Technology do?

FMF's Resonance Chamber Technology, used both internally and externally on this muffler, helps manage exhaust pulses. This design choice contributes to improved power delivery and performance gains across the entire RPM range.

What materials are used in this exhaust system?

This system is constructed from aerospace-grade titanium for the muffler, which is blue anodized and features a carbon fiber end cap. The header and mid-pipe are made from stainless steel.

Specifications

Brand: FMF Racing
Part #: 044477

FMF Racing Yamaha YZ450F 24-25 AL Factory 4.1 RCT w/ R. Carbon Cap Comp Sys w/SS MB Header/ Mid Pipe

Name: FMF Racing Yamaha YZ450F 24-25 AL Factory 4.1 RCT w/ R. Carbon Cap Comp Sys w/SS MB Header/ Mid Pipe
Brand: FMF Racing
SKU: fmf-racing-fmf-racing-yamaha-yz450f-24-25-al-factory-4-1-rct-w-r-carbon-cap-comp-t14-680953
Price: 1183.35 USD
Availability: BackOrder

$1183.35

On Backorder — Expected to ship by Apr 28, 2026

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

FMF Racing Yamaha YZ450F 24-25 AL Factory 4.1 RCT w/ R. Carbon Cap Comp Sys w/SS MB Header/ Mid Pipe. Offers massive power gains with advanced resonance chamber technology.

Key Features

Fits Yamaha YZ450F 2024-2025.
Constructed from aerospace-grade titanium with a blue anodized finish and a carbon fiber end cap.
Incorporates FMF's Resonance Chamber Technology for improved exhaust pulse management.
Features a shorter overall muffler length, moving the unit closer to the motorcycle's center of mass.
Includes stainless steel header and mid-pipe for efficient exhaust flow.
Equipped with the Rapid Tuning System (RTS) for easier performance adjustments.

This exhaust system is designed to fit Yamaha YZ450F models from 2024 to 2025.

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About this part

Product Details

The FMF Factory 4.1 RCT exhaust system starts with aerospace-grade titanium, chosen for its strength and light weight. This particular system is built for the Yamaha YZ450F models from 2024 and 2025, featuring a blue anodized titanium muffler with a carbon fiber end cap for a distinctive look and added durability. The design incorporates FMF's Resonance Chamber Technology, both inside and outside the muffler, to help manage exhaust pulses and improve power delivery across the entire RPM range. This updated design also results in a shorter overall muffler length, which not only looks good but also moves the unit closer to the motorcycle's center of mass. This centralization of weight is part of FMF's Factory Forward Engineering, aiming to improve handling and reduce susceptibility to damage in the event of a crash.

This system includes a stainless steel mid-pipe and header, ensuring a solid connection and efficient exhaust flow from the engine. The Rapid Tuning System (RTS) is also a notable feature, allowing for easier adjustments to fine-tune the exhaust's performance. Every component of this exhaust system is manufactured at FMF's Southern California factory, adhering to their strict quality standards. The result is a well-built exhaust that is designed to provide significant power gains throughout the RPM range, making your Yamaha YZ450F feel more responsive and potent.