aFe Magnum SHIELD Pre-Filter: For use with skus ending in XX-91039 & XX-90

24-91039 21/72-90049 (Black) aFe Magnum Shield Pre-Filters protect your performance air filter and extends your filter cleaning intervals by removing large particles from the air stream prior to the air filter. This pre-filter does not restrict air flow and is made of a dry weave fabric that does not attract dirt and cleans with soap and water.