2-into-1 equal-length headersStepped 1-3/4'' to 1-7/8'' headpipesUtilizes an advanced inner collector for maximum performanceStainless Steel 304 ConstructionUpswept Megaphone Muffler with removable end capHand Tig Welded18 mm O2 Ports with 12 mm Adapters and plugsMade in the U.S.A.Fits Mid-Controls '91- 2017 and forward controls '07-2017