AWE Tuning Foiler Wind Diffuser for Porsche 991 / 981 / 718AWE Tuning Foiler Wind Diffuser for Porsche 991 981 718 Presenting the AWE Foiler" Wind Diffuser. The simple, elegant, and proven solution to wind buffeting in Porsche 991 981 718s. What wind buffeting? You know that sound that makes it feel like your head is going to implode when driving your Porsche at speed with one window down? That called wind buffeting. It happens when you're moving fast, and it quite the issue on the new generations of Porsche