BMC sport filters provides over 150% better airflow than stock filters. Potential 8-10 HP gain. Less oily than other brands, they won't mess up mass flow sensors. BMC air filters are washable and re-oilable. Last a lifetime. BMC has developed a particular production system based on soft rubber moulding which produces the familiar BMC red filters. They are made in one single piece with no welded joints in the corners, thus avoiding breaking