K&N air filter elements are designed to fit the original equipment air cleaners and permanent installation in normal use. When extremely heavy dirt deposits are built up, the filters can be cleaned and re-used again and again. Top professional racers and mechanics rely on K&N filters to protect their expensive engines. K&N filters will give unrestricted air flow, more power, will not be affected by moisture and are quality engineered and manufactured from the best materials in order to meet the highest quality standards.