For 36 years now, innovating the line of reusable cotton gauze filter technology for automobiles has been the bread and butter for K&N Engineering. And what bread and butter it is that the steady growth has been established to make K&N a global company. From its roots of being a family undertaking, the filter company grew into immense proportions, having offices already in the United Kingdom and Netherlands. A leader in its field, K&N already has an extensive line of factory and replacement drop-in filters, Fuel Injection Performance Kits and its own line of Golden oil filters.