Exhaust F-Pipe Yz65 024069Factory Fatty PipeThe Factory Fatty is reminiscent of the works or cone pipe once used by Factory Teams and it shares many of the same characteristics with its craftsmanship and material quality Broadens and smooths 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 looking for Lighter 20 gauge steel used for