FMF 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)

Supplier SKU: 06-1728.FMF.Q4. Supplier availability is subject to change.

Why Buy From FDY Performance?

Shop with FDY Performance Ltd, a UK-based motorcycle parts and accessories retailer. We offer friendly product support and UK delivery options. Please check your bike make, model and year against the fitment information before ordering.