K&N 17-18 Subaru Impreza 2.0L H4 F/I Typhoon Short Ram IntakeThe K&N 69 8010TTK Typhoon air intake system is an air induction system designed to fit specific Subaru Impreza models. The K&N Typhoon air intake replaces the restrictive factory air filter and air intake housing. The tube dramatically reduces air flow restriction, smoothing and straightening the air flow. Air is delivered directly into the engine's throttle body for a guaranteed power gain. This allows your engine to inhale a larger amount of air