BRAND NEW, NEVER USED!!! YOU WILL BE GETTING A TWO HOLE GASKET THAT SEPARATE THE HEADER AND THE DOWN PIPE ON THE TWO PIECE DESIGNED 4-2-1 HEADER. DESIGNED TO OPTIMIZE AIR FLOW AND PREVENT EXHAUST LEAK BETWEEN THE TRANSITION. EASY TO INSTALL AND REPLACE. NO INSTRUCTIONS INCLUDED. GASKET IS GRAPHITE COATED WITH ALUMINUM CORE LAMINATE