Vibrant Performance's 14627 Audi 2.7T and 3.0 2AZFE Exhaust Manifold Flange will save you the time and high cost of getting header flanges cut when you need to fabricate a custom header or turbo manifold. This flange is cut from 1/2'' (12.7mm) thick mild steel. The port sizing on these exhaust header flanges is optimized for use with Schedule 10 or Schedule 40 pipe.