FMF Racing Factory Fatty Big Bore Pipe for KTM 85SX/105SX 18-24/Husqvarna TC85/TC105 18-24/Gas Gas MC85/MC105 21-24FMF Factory Fatty Pipe KTM Husqvarna Gas Gas 85cc The FMF Factory Fatty Exhaust is reminiscent of the works or custom cone pipes once used by Factory Teams when two strokes ruled the dirt. It shares many of the same characteristics with its factory works predecessors including the craftsmanship and material quality. Constructed with two thicknesses of high quality carbon steel, the lower portion is comprised of 19 gauge steel for optimum strength and