CPT Universal Water Guard Short Ram Cold Air Intake Pre-Filter Air Filter Cover CPT-WG-M-B (Medium 5.50"Wx6.75"H, Blue) Most affordable cold air and short ram pre-filter on the market Pre-filter mesh works in conjunction with your filters mesh to keep out even more water and debris from getting in, while still allowing for the passage of cold air Prolongs the life of your engine Easy to install and clean Universal, fits most cone and cylinder shaped filters from 4.75" to 5.25" wide x 5.25" to 5.75" High