The FMF Fatty exhaust pipe, part number 025329, is a 2-stroke pipe for the 2026 Beta 350RX, developed from over 35 years of racing experience. It is designed to broaden and smooth the power curve while increasing performance across the entire power band, including stronger low-end response, improved mid-range output and increased over-rev. It also offers more tractable power and improved throttle control, and can be used with an FMF or standard silencer unless otherwise noted.

Features

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  Broadens and smooths the power curve

  
  


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  Increases low-end power

  
  


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  Improves mid-range power

  
  


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  Increases over-rev

  
  


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  Provides power gains throughout the entire power band

  
  


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  More tractable power

  
  


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  Improved throttle control

  
  


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  Can be used with FMF or standard silencer unless otherwise noted

  
  

Specifications

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  Part number: 025329

  
  


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  Carbon steel construction

  
  


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  Nickel-plated finish

  
  


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  Manufactured using FMF Racing Tru-Flo stamping process

  
  


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  O-rings included

  
  

Vehicle Fitments

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  Beta 350RX 2026