Full exhaust systems for 4 strokes. Utilising FMF's famous MegaBomb or PowerBomb header systems, and matched with FMF's wide range of slip-on muffler options. FMF designs and builds everything by hand, from the ground up in the USA. As long as you dream of flying higher and going faster, FMF will continue to innovate for style, power and performance. We recommend all motorcycle parts are fitted and tested by qualified professionals. Fits: Honda CRF450R 2021 CRF450RX 2021-2022