FMF Racing MEGABOMB HDR YZ/WR250 01-10 Headers Exhaust POL STAINLESS STEELYAMAHA YZ250F 01-06, WR250F 01-10 - 044350 Most copied header in the world Patented technology (Patent # 7510050) Gain up to three horsepower with a single bolt-on mod The ultimate compliment to our Factory 4.1 muffler Quality construction for maximum durability