Header S/S Pbmb Kx250F 09-13 042179PowerBomb HeaderUtilize FMF's patented module precisely located at the initial stage of the header Position "Bomb" increases performance; horsepower is increased as much as 10% Act as "pre muffler" helping to lower the decibel output The expansion and contraction of exhaust sonics through the system causes increased flow Not for use with stock muffler. NOTE: Will not pass 2025 FIM sound regulation