Vibrant Exhaust Manifold Flange for Porsche 996/911 Motor - 3/8in Thick - Sold in PairsPrecision laser cut from 3 8 thick 304 Stainless Steel, this manifold flange can be used to create a turbo manifold or header. Vibrant Performance Stainless Flanges have port sizing that is optimized for use with standard wall round tubing. This Part Fits: Year Make Model Submodel 2004 Porsche 911 40th Anniversary Edition 1999 2004 Porsche 911 Carrera 1999 2004 Porsche 911 Carrera 4 2002 2005 Porsche 911 Carrera 4S 2002 2005 Porsche 911 GT2 2004 2005