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FMF Q4 — S/A Slip-On — Yamaha WR450F (2019-2026), Yamaha YZ450F (2018-2026) + 1

Part # 044442
Item #357781
Fits 3 motorcycles
  • Yamaha
    • WR450F · 2019–2026
    • YZ450F · 2018–2026
    • YZ450FX · 2019–2026
$449.99 $404.99 Save $45.00
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WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov
FMF Q4 HEX S/A Slip-On — Yamaha WR450F (2019-2026), Yamaha YZ450F (2018-2026) + 1 more, 4-Stroke
Product Details

The Q4 HEX is FMF's quietest 4-stroke slip-on — a hexagonal canister with sound-attenuating internal architecture and integrated spark arrestor. Built for noise-restricted tracks and U.S. Forest Service trails where you need quiet, low-decibel operation without losing performance feel.

  • Quietest FMF 4-stroke slip-on
  • U.S. Forest Service approved spark arrestor
  • Hexagonal aluminum canister
  • Stainless steel endcaps
  • Ideal for noise-restricted tracks and off-road

Fitment: 4-stroke bike specific — fits the following models:

  • Yamaha WR450F (2019-2026)
  • Yamaha YZ450F (2018-2026)
  • Yamaha YZ450FX (2019-2026)

This is a 4-stroke exhaust. It is engineered for the 4-stroke engine architecture above and physically will not fit a 2-stroke bike. Verify your engine type before purchase.

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