FMF Racing Yamaha YZ/WR450F 03-06/ YFZ450 04-09/ 12-15 SS Powerbomb HeaderThe redesigned PowerBomb is a 4 stroke header that incoporates FMF's patented PowerBomb module at a precise location in the initial stage of the header, resulting in performance gains and improved flow. This Part Fits: Year Make Model Submodel 2003 2006 Yamaha WR450F Base 2004 2009,2012 2015 Yamaha YFZ450 Base 2009,2012 2015 Yamaha YFZ450R Base 2009,2012 2015 Yamaha YFZ450R SE Base 2003 2006 Yamaha YZ450F Base