FMF Factory 4.1 RCT Complete System (w/ Stainless MegaBomb Header) — Kawasaki KX250F / KX250X 2021–2024

Header and muffler tuned as one unit: broader pull out of corners, a lighter overall package, and the throttle response FMF's factory race team chases.

Fits: Kawasaki KX250F / KX250X 2021–2024.

Why riders pick it:

• RCT (Resonance Chamber Technology) tuning throughout the header and muffler
• Durable stainless steel MegaBomb header widens the powerband and sharpens throttle response
• Aerospace-grade muffler materials shave significant weight off the complete system
• 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.