S&B filters combines all of their years of experience and design into their filter packages. The more pleats per filter, the higher the air flow. The higher the air flow, the higher the Horse Power and higher efficiency. You cannot deny that as well as being the best, it is also the finest looking air filter you can buy! And remember, it is totally reusable. Yet again, this air filter is proof positive that S & B Filters leads the world in filter design.