KTM FMF Fatty Pipe Expansion Chamber

High-strength steel expansion chamber for KTM two-stroke models

The KTM FMF Fatty Pipe Expansion Chamber delivers factory-level performance and craftsmanship for KTM two-stroke motorcycles. Modeled after the “works” pipes used by professional race teams, this expansion chamber is built to broaden and smooth the power curve, offering stronger low-end torque, improved midrange pull, and enhanced top-end over-rev for balanced power across the RPM range.

Details:
• High-quality, extra-strong steel construction for durability
• Lighter 20-gauge steel body and 19-gauge header for optimized performance
• Hand-pounded seams ensure smooth exhaust flow and consistent power delivery
• Untreated raw steel finish for a genuine factory appearance
• Improves throttle response and broadens usable power band
• Includes O-rings for installation
• Recommended for use with FMF silencer for best results
• Designed for closed-course and off-road competition use

Compatibility:
Fits select KTM two-stroke motocross and off-road models. Verify model and year before purchase to ensure proper fitment.

Engineered for riders seeking proven performance and durability, the FMF Fatty Pipe Expansion Chamber provides a factory-level upgrade that enhances power delivery and maintains a professional-grade look.