Designed to work with 1984–2016 Big Twin models with spherical exhaust port; also compatible with earlier style systems.Exhaust packing for cylinder head.Steel mesh, beveled gaskets—non-flat design.Replaces OEM part numbers 65324-83A, 17048-98, 65324-83B, 65834-98-X2.Fits Evolution and Twin Cam Big Twins from 1984 to present, and Evolution Sportster models from 1986 to present.Not compatible with V-Rod, Sportster 1200 (2010), Sportster XL883 (1989), XL1200S (1999), Softail Deluxe FLSTN (2005), or Road King FLHRC (2007).Package includes one pair of exhaust gaskets.