The exhaust made a good power increase throughout the whole rev range only problem is that it is prone to rust unless looked after exceptionally carefully.
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. Thoroughly tested and developed by the best racers in the sport, this pipe delivers true "works" style technology to the public. Looking to turn your bike into a race-ready powerhouse? The Factory Fatty is the first step you should take for bolt-on performance.
Note: Pipe may include factory indentations for proper installation clearance.