Ford Focus mk2 ST RS Replacement Foam Panel FilterThe Ramair Panel Filter range is made from twin core Ramair Aeriform foam and our stainless steel cage which is used in many of our tier 1 Motorsport applications for maximum strength. A rubber polymer surround gives a fantastic clean and smooth finish with longevity in mind. These filters are direct replacements for the OEM air filter in your car, making this filter easy to fit and maintain. Ramair twin core foam is unique and like no other in the