The K& N E-4900 is a synthetic oil-free replacement air filter provides exceptional filtration to your small engine or light industrial equipment. This air filter reduces restriction allowing the engine to breathe more efficiently. It is reusable, so it can be washed with K& N synthetic air filter cleaner then reinstalled to use again. It is the last air filter you will have to buy. K& N E-4900 air filter fits some Tecumseh engines and other applications.