The 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 than the factory air intake, for more power and acceleration throughout the engine's RPM range. Not only will this air intake system help generate more power, but it also improves engine sound with more aggressive and deeper acoustics during acceleration. The mandrel-bent aluminum tube delivers fierce looks, with its sleek, sturdy black powder-coated finish. Depending on driving conditions, the oversized, cone-shaped K&N high-flow air filter can be used for up to 100,000 miles before cleaning is needed. Installation is simple, usually requiring 90 minutes or less. This air intake installs using existing factory mounting points. The included heat shield mounts into the original air box space and the tube accommodates the factory mass air sensor and crank case vent hose. The only tools you'll need are a ratchet set, a couple of screwdrivers, and several wrenches.