The FMF Racing PowerBomb 040073 is a high-performance four-stroke header engineered to enhance power and efficiency through innovative exhaust technology. Featuring the patented PowerBomb module at a precise location within the header, it dramatically increases exhaust flow—boasting a nearly 10% gain—while also reducing sound output. The moto version is tailored to deliver robust power gains in the mid to upper RPM range, making it ideal for competitive riding environments.

Features

• Closed course use only
• Incorporates FMF’s patented PowerBomb expansion chamber for increased exhaust velocity and power
• Acts as a pre-muffler to help reduce sound output
• Specifically tuned moto version for optimal mid to upper RPM performance
• Constructed from durable stainless steel for strength and longevity
• Lightweight at just 1.4 lbs (approx.)

Specifications

• Item ID: 040073
• Type: Header
• Header construction: Stainless steel
• Header type: PowerBomb
• Version: Moto
• Weight: 1.4 lbs
• Carburettor warning: No

Vehicle Fitment

Yamaha

• WR250F (2001–2013)
• YZ250F (2001–2006)