Yamaha YZ250 1999 - 2025 FMF Factory Fatty Exhaust Pipe Expansion Chamber Raw

FMF Factory Fatty Exhaust Pipe Expansion Chamber Raw

The Factory Fatty is reminiscent of the works or cone pipe once used by Factory Teams. It shares many of the same characteristics with its craftsmanship and material quality. The Factory Fatty broadens and smoothes out the power curve while boosting gains throughout the entire power band, more low-end, more mid, and increased over-rev. No matter what type of riding you do, the Fatty has the benefits you're looking for.

- Lighter 20 gauge steel used for the body of the pipe.
- 19 Gauge steel used for the header portion.
- Includes O-rings on most models
- Hand pounded seams for smooth flow transitions.
- O-Rings Included

Fitment Details

• Yamaha YZ250 1999
• Yamaha YZ250 2000
• Yamaha YZ250 2001
• Yamaha YZ250 2002
• Yamaha YZ250 2003
• Yamaha YZ250 2004
• Yamaha YZ250 2005
• Yamaha YZ250 2006
• Yamaha YZ250 2007
• Yamaha YZ250 2008
• Yamaha YZ250 2009
• Yamaha YZ250 2010
• Yamaha YZ250 2011
• Yamaha YZ250 2012
• Yamaha YZ250 2013
• Yamaha YZ250 2014
• Yamaha YZ250 2015
• Yamaha YZ250 2016
• Yamaha YZ250 2017
• Yamaha YZ250 2018
• Yamaha YZ250 2019
• Yamaha YZ250 2020
• Yamaha YZ250 2021
• Yamaha YZ250 2022
• Yamaha YZ250 2023
• Yamaha YZ250 2024
• Yamaha YZ250 2025