BMC Conical Twin Air Pod Filter 4" Inlet 143mm Diameter 186mm LengthBMC conical filters for direct air intake can be installed on most types of engine by removing the original airbox. BMC direct induction conical filters are manufactured using a characteristic red rubber that allows the connection of the intake to be particularly resistant to both engine stress and heat without suffering from deformations caused by the high temperature. The special filtration mesh allows the production of filters with a power up to