QuadBoss 12-13 Arctic Cat 550 EFI 4x4 Exhaust Gasket KitTwo stroke kits include all applicable O rings, springs, washers and gaskets. Four stroke kits include the exhaust gasket. Multi cylinder applications include enough items for the entire machine. Polaris kits include gasket, both header donuts and springs This Part Fits: Year Make Model Submodel 2009 2011 Arctic Cat 550 4x4 Auto TRV Base 2010 2011 Arctic Cat 650 H1 4x4 Auto Mud Pro Base 2011,2014 Arctic Cat 700 LTD Base 2013 2014 Arctic Cat 700 XT