K&N's reusable billet oil filter will last the lifetime of your vehicle under normal vehicle operating conditions. The oil filter housing, bypass valve and call plate are CNC machined from Billet 6061 T6 Aluminum. The filter cartridge uses stainless steel micro-screen and end caps bonded into a single piece for extra durability. The mechanical filtration is accomplished with dual woven T 304 stainless steel micro-screen that provides excellent engine protection while providing substantial increase in oil flow when compared to standard disposable oil filters. The filter cartridge contains two Neodymium magnets located in the filter screens for additional capacity and debris removal. All of the seals are dependable long lasting mil-spec Viton for a dependable seal. The billet by-pass valve is removable for cleaning and uses a stainless steel sealing ball with a stainless steel spring for increased service life. Each oil filter is manufactured from high quality material and components, designed for very high flow rates at low restriction, provides excellent engine protection and is easy to clean and maintain. A K&N Reusable Billet Oil Filter by Pure Power is truly the last oil filter you will ever need to buy. K&N automotive oil filters can help improve engine performance by reducing oil filter restriction.