18211999 MUFFLER Q4 HEX

Name: FMF MUFFLER Q4 HEX
Brand: FMF
SKU: 18211999
Price: 440.56 GBP
Availability: InStock

Fits 9 bikes

RRP £518.30 Save 15%

£440.56

incl. VAT

In stock — ships in 3 working days

Usually dispatched within 3 working days.

Part #: 18211999

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§ 02 / About this part

What it is

The FMF MUFFLER Q4 HEX, motocross part. Stocked by Iron Offroad, the UK MX hard parts specialist.

This muffler is engineered for riders needing to meet strict noise regulations without sacrificing power. It features internal baffles and chambers to reduce decibels while maintaining a free-flowing exhaust path. The integrated spark arrestor makes it suitable for green lanes and enduro events. It sits on the rear subframe and replaces the restrictive stock silencer. The aluminium and stainless steel construction handles the heat of long trail rides. Check the spark arrestor screen regularly for carbon build-up to maintain flow. This unit provides a broader powerband for technical off-road riding.

§ 03 / Specs

The numbers

Brand: FMF
Part number: 18211999
Weight: 2.67 kg
VAT: 20%

// Fitment

Will it fit your bike?

Fits 9 models · 10 year-bands

Gas Gas 2 models

Husqvarna 5 models

KTM 3 models

* Fitment data is provided as a guide. Verify compatibility against the bike's owner's manual or service handbook before ordering. Iron Offroad accepts no liability for incorrect application. Full terms and conditions apply.

§ 05 / About Iron Offroad

Iron Offroad

Iron Offroad is the off-road sibling of Iron City and Iron Stable — a UK shop for motocross, enduro, and trail-bike hard parts. Every fitment lives on the site, listed against KTM, Husqvarna, GasGas, Yamaha, Honda, Kawasaki, Suzuki, and Beta. Pick your bike on the timing-tower. Our USP is the data: fully enriched fitment so you find the right part for your bike quickly and get it fitted accurately. Brands you'd find on a paddock workbench — pads, sprockets, plastics, fork seals, cables, gaskets, bars, the things that actually wear out. Road-bike kit, scooter parts, and quad gear sit elsewhere; dirt and e-moto only. We operate from our storage facility in Leeds. Iron Offroad is a trading name of Iron Stable Ltd, registered in Mildenhall — Company No. 17061294. The business has a rich motorcycle history across multiple moto brands — the photos show where we came from — and recently pivoted into hard parts and online retail.