High-performance heavy-duty two-stroke expansion chamber engineered to deliver robust, tractor-like bottom-end and midrange power for vintage and 90s-era KTM big-bore off-road applications. Constructed from tough 18-gauge carbon steel to withstand severe rock strikes, heavy trail abuse, and extreme thermal cycling while significantly improving low-end torque and throttle response.
Specs & Details
- Manufacturer Part Number: 78-1514
- Alternative Part Number: FMF 025005 / 1820-0082
- Component Type: 2-Stroke Expansion Chamber / Exhaust Pipe
- Material & Construction: Heavy-gauge 18-gauge carbon steel with a nickel-plated finish
Two-Stroke Vehicle Fitment
| Make | Model | Engine Type | Year Range |
| KTM | 250 / 300 / 350 MX / EXC / M/XC | Two-Stroke Motocross / Off-Road | 1990–1997 |
TSO Garage Note
The ultimate armor upgrade for vintage 90s Austrian big-bores. This heavy 18-gauge chamber thickens up low-end torque to help you lug through nasty terrain, while easily absorbing the brutal trail impacts that would instantly crush a thin stock expansion chamber on an older restoration or trail rig.
