The aFe MagnumSHIELD Pre-Filter (black, part 28-10043) is an outer wrap that slides over a compatible aFe performance air filter. The manufacturer says it removes large particles from the air stream before they reach the air filter, which extends filter cleaning intervals. It is a practical add-on for owners of aFe intake setups who drive in dusty conditions and want to stretch the life of a filter they already paid for.
Its main advantage over a bare filter is airflow. The manufacturer states the pre-filter does not restrict air flow, and its dry weave fabric resists dirt, so it can be cleaned with soap and water rather than replaced. For a shopper weighing a generic foam sock against this option, the aFe design is built specifically for aFe filter dimensions, so it fits without modification.
Fitment is tied to the filter part number. The manufacturer lists the pre-filter as confirmed for specific aFe POWER air filters, including 24-91018, 21/72-90020, and 24/24-91107. Before ordering, match your filter's part number to that list. Search terms that fit this product include aFe pre-filter for 21-90020 air filter, aFe 28-10043 dry weave pre-filter, and aFe MagnumSHIELD black pre-filter cleaning.
The manufacturer lists compatibility with aFe POWER air filters 24-91018, 21/72-90020, and 24/24-91107. Confirm your filter's part number against that list before buying.
The manufacturer states that the pre-filter does not restrict air flow.
The manufacturer states that the dry weave fabric cleans with soap and water and does not attract dirt in the way oiled media does.
