FMF Fatty Pipe Expansion Chamber Exhaust

The FMF Fatty Pipe is a 2-stroke expansion chamber exhaust (also called an expansion pipe or tuned pipe) for off-road, motocross and ATV engines. It is built to improve engine performance and make the power band easier to use.

Key Features:

• Fatty design has an enlarged mid-section. It is intended to boost low-end and mid-range power and give strong throttle response.
• Tuned expansion chamber shape helps scavenge the cylinder and improve combustion efficiency.
• Fabricated by FMF, a long-established name in 2-stroke and 4-stroke exhaust for racing and trail riding.
• Designed to work as part of a complete 2-stroke exhaust setup. Pair it with a compatible FMF silencer for the best results.

The Fatty Pipe is a popular upgrade for riders who want more usable power out of a 2-stroke engine. Each part number in this line is made for a specific application, so choose the one that matches your machine.