Quote Originally Posted by texasboy21 View Post
You don't have to cut anything, you simply remove the snow screen. With an upgraded turbo inlet and snow screen delete you can hear the induction noise more. The inlets are metal and metal induction tubes tend to be louder than silicone or plastic. That said, there a devise that sends artificial intake sound into the cabin that can be adjusted or disabled (volume set to 0).

The 'engineering' is the same as it is on any modern turbo car, meaning it is more about pressure differential than "flow". The stock airbox and filter can easily support all the airflow the turbo can move, and therefore is not a restriction limiting power. The aftermarket turbo inlets increase performance of the engine by reducing the pressure drop pre-turbo (as does larger diameter piping, less turns, shorter distance, etc.) creating efficiencies - less heat, more airflow at the same manifold PSI, etc.

The same principle is seen post turbo as well. You don't have to increase the downpipe diameter to increase performance, you simply need to remove the cat (although the increase in diameter can help as well). Lower restriction, higher efficiency, more power!

there is a part that can be dremeled out. you do not have to but there are multiple videos out there that show what im talking about