BMC (FB813/01) High Performance Air Filter BMC Filters are constructed using a process called "Full Moulding" developed by the BMC F1 R&D team BMC air filters are designed and produced to ensure a higher air flow than OEM air filters The filtering material is composed of a special cotton gauze soaked with low-viscosity oil to give you the best air permeability BMC Air Filters are washable and reusable, perfect for high performance applications For more options and other great products check out MADNESS Autoworks.com