The VTA from GFB is a high quality performance blow off valve. If you want sound with your performance (or performance with your sound!), GFB s VTA delivers just that! By combining the proven performance benefits of the ground-breaking DV+ with atmosphere venting, the VTA delivers an aggressive blow-off sound, improved throttle response and boost recovery, as well as superior boost holding and reliability in extreme conditions.The factory diverter valve found on these cars has two distinct issues reliability, and performance, a high quality aftermarket blow off valve such as this solves these issues.Reliability There are two ways in which the factory diverter valve can fail; the un-reinforced rubber diaphragm can rupture, and the metal valve stem that slides in the plastic cap can stick. In both cases, there is a risk to the turbocharger, as the ECU will attempt to compensate for a boost leak by increasing the wastegate duty cycle, which increases the turbo RPM significantly. The V