RTMG Performance Muffler Delete for K04-064 Turbochargers Black - RTMG-901-0887 - The K04-064 Turbocharger has a muffler in the compressor housing which resonates with the turbocharger noise and creates turbulence in the airflow. This results in reduced airflow and performance, especially in high-performance applications. Attention: For installing this product, a modification of the intercooler piping is required because the stock coupling is with clips. In addition, a small silicone hose is required which is not included in the kit. * This product is not suitable for EA888 Engines.