FMF FACTORY 4.1 RCT ALUMINUM S/S SLIP-ON MUFFLER W/ CARBON END CAP

§ 01 / Part

18211414 FACTORY 4.1 RCT ALUMINUM S/S SLIP-ON MUFFLER W/ CARBON END CAP

Fits 2 bikes
RRP £565.39 Save 15%
£480.58

incl. VAT

In stock — ships in 3 working days

Usually dispatched within 3 working days.

Part #: 18211414

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FMF

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§ 02 / About this part

What it is

The FMF FACTORY 4.1 RCT ALUMINUM S/S SLIP-ON MUFFLER W/ CARBON END CAP, motocross part. Stocked by Iron Offroad, the UK MX hard parts specialist.

This slip-on utilizes Resonance Chamber Technology to refine the exhaust pressure wave, improving power across the entire curve. The stainless steel mid-pipe and aluminium canister offer a robust alternative to the stock unit. A carbon fibre end cap reduces weight at the rear of the bike, aiding handling in technical sections. It is designed for four-stroke machines and bolts directly to the OEM header pipe. Regular maintenance of the internal packing is necessary to protect the canister and maintain peak performance. Ensure all mounting hardware is secured with thread lock during installation.

§ 03 / Specs

The numbers

Brand
FMF
Part number
18211414
Weight
2.97 kg
VAT
20%

// Fitment

Will it fit your bike?

Fits 2 models · 2 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