Alta Performance Filter PanelALTA Performance was the first to offer you a replacement high flow drop in filter for your R56 and JCW. This environmentally responsible filter iscompletelyreusableand will last you the life of your car! High Flow Drop In Our high flowing, super cleaning foam media allows us to make the filter thinner while keeping the maximum amount of volume to hold dirt. This simple change allows for more air to be drawn across the entire filter. This also allows