K&N REPLACEMENT AIR FILTER TO SUIT TOYOTA PRIUS ZVW30R ZVW35R ZVW40R ZVW41R 2ZR-FXE 1.8L I4This K&N replacement air filter is designed to increase horsepower and acceleration while providing excellent filtration. It is washable and reusable, and is custom designed to fit into your existing factory air box. Its drop in design means adding performance is simple. With most vehicles, you simply have to remove the disposable air filter and replace it with a K&N air filter. This air filter suits Toyota Prius vehicles fitted with the 2ZR FXE I4