FMF FATTY GOLD SERIES EXHAUST PIPE 2-STROKE

§ 01 / Part

FMF Fatty Gold Series 2-Stroke Exhaust Pipe 18220631 for Beta RX300 2025

Fits Beta RX 300
RRP £346.87 Save 15%
£294.84

incl. VAT

In stock — delivered in 6–10 working days

Dispatched in 2–3 working days · delivered in 6–10.

Part #: 18220631

Authorised stockist

FMF

14-day returns

Easy & hassle-free

Secure checkout

256-bit encryption

§ 02 / About this part

What it is

FMF Fatty Gold Series 2-stroke exhaust pipe to fit Beta RX300 (2025).

This expansion chamber provides a linear power increase across the entire rev range. It improves throttle response and broadens the usable powerband for both MX and cross-country use. The nickel-plated finish protects the steel from corrosion in wet UK conditions. It sits between the cylinder manifold and the silencer. Fitment is model-specific and usually requires no jetting changes on modern carburetted bikes. Check your exhaust springs for tension and replace them if they are stretched. This pipe offers a versatile power delivery that suits a wide variety of riding styles and terrain.

§ 03 / Specs

The numbers

Brand
FMF
Part number
18220631
Category
Mid Pipes
Weight
2.34 kg
VAT
20%

// Fitment

Will it fit your bike?

Fits 1 model · 1 year-band

* 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.
Iron Offroad Iron Offroad Iron Offroad Iron Offroad Iron Offroad
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 ✦