FMF Racing Factory Exhaust Pipe KTM Husaberg TE 2 Stroke 250 300 11-14 025133 Same shaped cone sections as the popular fatty pipe. Factory fatty is constructed with 2 different thicknesses of us steel. 19-gauge steel for the header portion for optimum strength and durability. 20-gauge steel for the body and rear cone section for increased weight savings. The thinner steel yields a slight increase in power when compared to thicker materials due to more e