The BMC CDA filter system is composed of a cylindrical carbon air box containing a washable filtering element. Substituting the original air box with the CDA, cold air is directly channelled through an internal airflow deflector to the filter and drawn into the engine with a very small pressure drop (it is a patented system). The CDA system also includes a black alloy ducting (60 cm length) for connecting the system to an air intake on the front of the car. Dyno and Datron Laser tests demonstrate the great performance of the CDA filtering system.