BMC air filters for various BMW S55 and S63 engines are produced using a "Full Molding" system that enables the characteristic red filter to be realized from a single mold with no welded joints thus avoiding easy breakage.

The panel air filters are commonly referred to as "replacement air filters". They are installed in the vehicle's original airbox to replace the OEM air filters. It is made of highly performing materials that allow an increased air flow combined with a more efficient filtration, guaranteeing containment of all impurities from as small as 7 microns (compared to OEM's 10 microns).

The rubber used in BMC air filtering systems have a long life, are very durable and have optimum adhesion characteristics to all shapes of airboxes. BMC filters are made of a multi-layered cotton gauze soaked with low viscosity oil covered with an epoxy coated alloy mesh to ensure protection from petrol fumes and oxidization due to air humidity.

All BMC air filters are pre-oiled, and they can be washed and regenerated by using the appropriate BMC regeneration kit (sold separately).