Vibrant Exhaust Manifold Flange for Audi 2.7T - 3/8in Thick - Sold in PairsVibrant Performance has developed one of the largest offerings of Exhaust Manifold Flanges in the industry. All of our Exhaust Manifold Flanges have had their exhaust port size optimized for either standard wall round tubing or Schedule 10 weld fittings. Catalog This Part Fits: Year Make Model Submodel 2000 2004 Audi A6 Quattro Base 2001 2005 Audi Allroad Quattro Base 2001 2002 Audi S4 Avant 2000 2002 Audi S4 Base