FMF MUFFLER ALUM FCTR 4.1RCT

§ 01 / Part

18211920 MUFFLER ALUM FCTR 4.1RCT

Fits 11 bikes
RRP £665.41 Save 15%
£565.60

incl. VAT

In stock — ships in 3 working days

Usually dispatched within 3 working days.

Part #: 18211920

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FMF

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§ 02 / About this part

What it is

The FMF MUFFLER ALUM FCTR 4.1RCT, motocross part. Stocked by Iron Offroad, the UK MX hard parts specialist.

This aluminum silencer uses Resonance Chamber Technology to increase exhaust volume and improve flow. This results in power gains throughout the rev range while lowering the decibel level. It sits at the rear of the exhaust system and connects to the header pipe. The design allows for a shorter canister which moves the weight closer to the centre of the bike. Use this for motocross or fast enduro where performance and noise compliance are both required. Repack the silencer at regular intervals to maintain the resonance chamber's effectiveness and protect the canister.

§ 03 / Specs

The numbers

Brand
FMF
Part number
18211920
Weight
3.44 kg
VAT
20%

// Fitment

Will it fit your bike?

Fits 11 models · 11 year-bands

* 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.
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Free UK shipping over £100 14-day no-quibble returns OEM-grade parts only UK support · Tue–Fri 9–5, Sat 9–4 Race-shop prices, paddock service Collection from Leeds by arrangement
Free UK shipping over £100 14-day no-quibble returns OEM-grade parts only UK support · Tue–Fri 9–5, Sat 9–4 Race-shop prices, paddock service Collection from Leeds by arrangement