FMF Gnarly Pipe Expansion Chamber — KTM 250 SX / 250 XC / 250 XC-W / 300 XC / 300 XC-W (also Husaberg TE250/300, Husqvarna TC250/TE250/TE300) 2011–2016

This FMF expansion chamber is pipe-tuned for a broader, more tractable power delivery than the stock unit.

Fits: KTM 250 SX / 250 XC / 250 XC-W / 300 XC / 300 XC-W (also Husaberg TE250/300, Husqvarna TC250/TE250/TE300) 2011–2016.

Why riders pick it:

• Expansion chamber tuning sharpens throttle response and broadens the power spread
• Works with your stock silencer or any FMF 2-stroke silencer
• Classic FMF chamber design refined for consistent, predictable power delivery
• Direct bolt-on installation, no tuning required

⚠️ For closed-course competition / off-road use only — not legal for street use in some states. Confirm your local regulations.

Not sure it fits your bike? Send us your year and model and we'll confirm.