Q4 Exhaust Silencer 03-06 Yamaha WR YZ 450 F - FMF 044199

FMF’s Q4 044199 is engineered for off-road enthusiasts demanding maximum power without excessive noise. Leveraging years of championship-proven design, the Q4 delivers industry-leading sound reduction using precision chambers, multi-stage packing, and robust aircraft-grade materials. Its versatile construction allows compatibility with both OEM and FMF headers, making it a versatile, durable upgrade that excels in performance without breaching noise limitations. Includes a removable spark arrestor for safe, controlled riding.

Features

• High-performance quiet technology developed for competitive off-road use


• Maximum sound output 96dB; most applications output below 93dB


• Aircraft-grade aluminium body with stainless steel midpipe and endcap for strength and weight savings


• Lightweight at 5.9 lbs for improved handling


• Compatible with FMF or stock OEM headers for flexible installation


• Removable screen-type spark arrestor included for regulation compliance

Specifications

• Variant Code: 044199


• Type: Slip-On


• Configuration: Single


• Construction: Aluminium


• Finish: Natural


• Midpipe: Stainless Steel


• Endcap: Stainless Steel


• Spark Arrestor: Screen Insert (included)


• Weight: 5.9 lbs


• Maximum Sound Output: 96dB (most models below 93dB)


• Intended Use: Closed Course Only


• Carb Warning: No

Vehicle Fitment

Yamaha

• WR450F (2003–2006)


• YZ450F (2003–2005)