SS Inductions Cold Air Induction Kit Subaru WRX incl.STI>10/2000The standard system is small and extremely restrictive. SS Inductions’ Big Mouth™ system incorporates a chunky induction with airflow deflectors and a high volume air chamber. Expect up to 9kW, smoother performance, more responsive throttle and a considerable fuel saving. The three-part kit consists of plastic induction unit, plastic air chamber and replacement bonnet rod.