The aFe Magnum SHIELD foam pre-filter is a 1/2-inch-thick open-cell polyurethane foam layer designed for use with part numbers 81-10068 and 87-10068. It captures large particles before they reach the main filter, increases dust-holding capacity by about 50%, and is washable and reusable to extend filter service intervals. Intended for off-road and dirty environments where extra protection is needed.
aFe Magnum SHIELD Foam Pre-Filter For Use With 81-10068 & 87-10068