Compatible Models: Husaberg FE250 2013-2014 KTM XC-F 250 2011 SX-F 250 2011-2012 XCF-W 250 2012-2013 FMF Part no 045391 Features: 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. Reduces sound output by as much as 1.5 dB. Notice: For Closed Course Competition Use Only. Not Intended for Street Use. - Type: Header. - Midpipe: Stainless Steel. - Header Const: Stainless Steel. - Header Type: MegaBomb. *This product is legal only for closed course competition use and is not legal for use on street vehicles or recreational vehicles. Notice: Closed Course Use Only Item ID: 045391 Type: Header Midpipe: Stainless Steel Carb Warning: no Header Const: Stainless Steel Header Type: MegaBomb Fitment: fits FMF silencer only Weight: 2.5 lbs.