FMF YAM YZ250'99-23 FACTORY F-PIPE 24056FMF YAM YZ250'99 23 FACTORY F PIPE 24056 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 youre