The new AC Twister Power Filter has a high flow, rapid, increased twisting of airflow for sound and performance. This Twister Filter delivers the most power and sound. This unique design decrease restriction allowing a substantial improvement in airflow and power. The stainless steel twister is constructed of stainless steel mesh, so you don’t have to worry about deterioration. Filter has carbon fiber look top, or colored aluminum top. The cotton mesh element comes in Blue, Green, Red, Silver, and Yellow.