This ProRam range of replacement air filters from RamAir feature a pleated synthetic nanofibre filtration media for maximum surface area and increased filtration. This allows for higher air flow with excellent dust and dirt filtration to protect your engine. The top cap of the filter includes an inverted cone to increase the intake area (excluding 63mm high filter) and the base has a 152mm diameter rubber polymer neck designed to fit a velocity stack insert which has an aluminium neck to allow fitment to rubber or silicone hoses.Pleated filtration media for maximum airflow and dust / dirt retention152mm wide air filter intake to fit the RamAir velocity stack insertSuitable for fitting to a rubber or silicone intake hoseInverted cone end cap provides increased airflow (not on 63mm high filter)Dimensions: 197mm base diameter, 120mm top diameter, 25mm neck length, 152mm neck diameter.