The FMF MegaBomb exhaust header is designed for the 2027 Kawasaki KX250F and KX250FX. It is a header rather than a complete exhaust system and is intended to improve response across the rev range for motocross and technical off-road riding.

Features

• MegaBomb design is intended to strengthen low-to-mid-range response while broadening power into the upper range; these are design aims, not measured results for this part.
• The chamber may help reduce exhaust noise, depending on the exhaust set-up.
• Designed to pair with a compatible FMF muffler. Fitment with a standard muffler is not guaranteed; confirm the matching FMF muffler before ordering.

Specifications

• Material: stainless steel. FMF describes its stainless-steel headers as more durable, but heavier, than its titanium versions.
• Configuration: single.
• FMF cites noise reductions of up to 1.5 dB for the MegaBomb header design generally, depending on set-up; this is not a model-specific measurement for this part.

Cross-Reference OEM Part Numbers

• FMF: 042422

Vehicle Fitments

• Kawasaki KX250F — 2027
• Kawasaki KX250FX — 2027