The BMC air filter is composed of a metallic mesh containing an oiled four ply cotton filtration material. This ensures a high level of filtering efficiency with guaranteed containment of all impurities down to 7 microns, where paper filters generally only offer filtration of particles of 10 microns. BMC air filters are also designed and produced to ensure a higher air flow than original filters, producing less than half the pressure drop when compared to paper filters. BMC air filters allow more air into the engine in comparison, while providing better protection. The unique construction of BMC Air Filters results in both Increased Power and Improved Fuel Economy.