EuroCustoms Diverter Valve. Fits all VW/Audi 1.8T & 2.7T Engines. A must have for tuned/chipped vehicles. The stock diverter valves tend break down and leak boost pressure which results in loss of power. Our diverter valve will maintain boost pressure for less lag, quicker and smoother throttle response. Our diverter valve includes a lifetime warranty and is made of high grade billet aluminum with a mirror polished finish.