The MotoSport Rock Steering Stem is a big upgrade from your stock part, providing more strength and durability, along with the ability to raise the handlebars by up to 2 inches. Made of 4130 chromoly for high strength. These stems raise your bars 0 - 2" higher than stock (varies per application). Notes: MUST use Replacement Steering Stem Clamp Mounting Hardware, sold separately. Fitment Note: Yamaha YFZ450, Raptor 660 and Raptor 700 steering stem heights are NOT exact measurements according to the drop down selection. 2004 - 2005 YFZ450 model height measures 2" TALLER than stock while the 2006 - 2012 model measures 1-3/16" TALLER than stock.