Sierra 18-2849-1 MerCruiser Exhaust Elbow GasketStandard cooling, full flow 4 slot gasket. For use on MerCruiser 1998-2001 GM V-6 & V-8 with center rise outlet exhaust manifolds.Interchangeable with: Barr; MC 47 27 87105; GLM; 32080; Mallory; 9-61414; MerCruiser Stern Drive; 27-863726; 27-860232; 27-818832; 27-871051; 27-87105; Osco; 8503-GO; Use with: 18-1908: Manifold Riser Spacer; 18-1952-1: Manifold; 18-1957-1: Manifold; 18-1970-1: Elbow; 18-1985: Manifold Spacer; 18-1974-1: Elbow; 18-8556: Exhaust Elbow Mounting Kit; 18-1953-2: Manifold; 18-1958-1: Manifold; 18-1962-1: Manifold; 18-8554: Exhaust Elbow Mounting Kit; 18-1976-2: Manifold Elbow;