FMF Racing Factory Fatty 2-Stroke Exhaust Pipe

FMF Racing Factory Fatty 2-Stroke Exhaust Pipe
$206.99 - $224.99
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  • Details
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  • Q & A

FMF Racing Factory Fatty 2-Stroke Exhaust Pipe - Details

The FMF Racing Factory Fatty was once only available to factory race teams. This pipe is based on the world famous Fatty but constructed from a thinner gauge metal with hand pounded seams materials and techniques that make a true "works" pipe. The Factory Fatty is renowned for its thick and linear power band - always with power on demand. No matter what type of riding you do, the Fatty has the benefits you're looking for.

  • Unplated carbon steel 2-stroke motorcycle exhaust pipe reminiscent of the cone pipe used by factory dirt bike race teams
  • Constructed of materials and techniques that make a true "works" pipe
  • Lighter 20 gauge steel used for the body of the pipe with heavier 19 gauge steel used for the header portion
  • Hand pounded seams provide smooth flow transitions and a superior flow
  • Boosts gains throughout the entire power band, more low end, more mid, and increased over-rev
  • Broader, smoother power band with the factory sound
  • More tractable power, better throttle control
  • Includes O-rings

Note: For closed course competition use only. Not intended for street use.

Note: Image for reference only. Actual product may vary according to vehicle.

Note: This product may not be legal for sale or use in California or in other localities due to state and/or federal anti-tampering laws. Refer to before purchasing.


FMF Racing Factory Fatty 2-Stroke Exhaust Pipe - Reviews

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Questions and Answers

FMF Racing Factory Fatty 2-Stroke Exhaust Pipe - Questions and Answers

Have a product related question about fit, features, or functionality? Ask your question here and get answers from fellow riders.
If you have a question about availability or need immediate assistance, call 1-800-841-2960 to speak with our motorcycle experts.
I own a 2014 250 sx with a 300 cc big bore kit; does FMF or any other manufacturer make a 300 cc specific pipe for my bike?
Ron M
No, the pipes that they make are for the oem displacements. The 250 pipe will work for you no matter how big you bore the cylinder.
Chaparral Motorsports
Feb 02, 2015
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HI, Will this o5 fmf factory fatty fit and run good on a 03 kx 250 if I do a little welding on the brackets?It looks very similar to a 03 chrome Fatty and this is for an 05 to 07.I know the frame was changed a little,but I think it will fit with a little work. I don't want a chrome fatty pipe on my bike. Welding new attachment brackets and cleaning maintaince is not a problem. I was a machinist for 15 years.Will this pipe run on an earlier o3 kx? Anybody know? Thanks
Fred C
No, this pipe is for the 2005 and up.
Chaparral Motorsports
Jul 31, 2014
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